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* [Bug 207629] BISECTED Bluetooth: hci0: command 0x2042 tx timeout - suspend fails - Dell XPS 9300
       [not found] <bug-207629-62941@https.bugzilla.kernel.org/>
@ 2020-05-11  3:05 ` bugzilla-daemon
  2020-05-11  4:06 ` bugzilla-daemon
                   ` (25 subsequent siblings)
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From: bugzilla-daemon @ 2020-05-11  3:05 UTC (permalink / raw)
  To: linux-bluetooth

https://bugzilla.kernel.org/show_bug.cgi?id=207629

Len Brown (lenb@kernel.org) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |abhishekpandit@chromium.org
            Summary|Bluetooth: hci0: command    |BISECTED Bluetooth: hci0:
                   |0x2042 tx timeout - suspend |command 0x2042 tx timeout -
                   |fails - Dell XPS 9300       |suspend fails - Dell XPS
                   |                            |9300

--- Comment #4 from Len Brown (lenb@kernel.org) ---
dd522a7429b07e4441871ae75ebbfcf53635bdd4 is the first bad commit
commit dd522a7429b07e4441871ae75ebbfcf53635bdd4
Author: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
Date:   Wed Mar 11 08:54:02 2020 -0700

    Bluetooth: Handle LE devices during suspend

    To handle LE devices, we must first disable passive scanning and
    disconnect all connected devices. Once that is complete, we update the
    whitelist and re-enable scanning

    Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
    Signed-off-by: Marcel Holtmann <marcel@holtmann.org>


Unfortunately this commit, by itself, does not cleanly revert from upstream.

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* [Bug 207629] BISECTED Bluetooth: hci0: command 0x2042 tx timeout - suspend fails - Dell XPS 9300
       [not found] <bug-207629-62941@https.bugzilla.kernel.org/>
  2020-05-11  3:05 ` [Bug 207629] BISECTED Bluetooth: hci0: command 0x2042 tx timeout - suspend fails - Dell XPS 9300 bugzilla-daemon
@ 2020-05-11  4:06 ` bugzilla-daemon
  2020-05-11  4:59 ` bugzilla-daemon
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  To: linux-bluetooth

https://bugzilla.kernel.org/show_bug.cgi?id=207629

Len Brown (lenb@kernel.org) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Blocks|                            |178231


Referenced Bugs:

https://bugzilla.kernel.org/show_bug.cgi?id=178231
[Bug 178231] Meta-bug: Linux suspend-to-mem and freeze performance optimization
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* [Bug 207629] BISECTED Bluetooth: hci0: command 0x2042 tx timeout - suspend fails - Dell XPS 9300
       [not found] <bug-207629-62941@https.bugzilla.kernel.org/>
  2020-05-11  3:05 ` [Bug 207629] BISECTED Bluetooth: hci0: command 0x2042 tx timeout - suspend fails - Dell XPS 9300 bugzilla-daemon
  2020-05-11  4:06 ` bugzilla-daemon
@ 2020-05-11  4:59 ` bugzilla-daemon
  2020-05-11 19:11 ` bugzilla-daemon
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From: bugzilla-daemon @ 2020-05-11  4:59 UTC (permalink / raw)
  To: linux-bluetooth

https://bugzilla.kernel.org/show_bug.cgi?id=207629

Len Brown (lenb@kernel.org) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Kernel Version|5.7.rc1, 5.7-rc2, 5.7-rc3,  |5.7-rc1, 5.7-rc2, 5.7-rc3,
                   |5.7-rc4                     |5.7-rc4, 5.7-rc5

--- Comment #5 from Len Brown (lenb@kernel.org) ---
5.7-rc5 also fails.

It works with the following two commits reverted:

# "Bluetooth: Pause discovery and advertising during suspend"
git revert 4867bd007d25a8dfd4ffc558534f7aec8b361789

# "Bluetooth: Handle LE devices during suspend"
git revert dd522a7429b07e4441871ae75ebbfcf53635bdd4

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* [Bug 207629] BISECTED Bluetooth: hci0: command 0x2042 tx timeout - suspend fails - Dell XPS 9300
       [not found] <bug-207629-62941@https.bugzilla.kernel.org/>
                   ` (2 preceding siblings ...)
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From: bugzilla-daemon @ 2020-05-11 19:11 UTC (permalink / raw)
  To: linux-bluetooth

https://bugzilla.kernel.org/show_bug.cgi?id=207629

--- Comment #7 from Abhishek Pandit-Subedi (abhishekpandit@chromium.org) ---
Does your system rfkill Bluetooth on suspend? I think that's what was happening
on https://bugzilla.kernel.org/show_bug.cgi?id=207169

Without rfkill (directly entering suspend), the issue seemed to disappear:
https://bugzilla.kernel.org/show_bug.cgi?id=207169#c14

The bluetooth commits you've identified added a suspend hook in bluetooth so it
gracefully disconnects active connections and sets up wakeup hooks on
reconnections. If Bluetooth is rfkill-ed, it won't be able to do this and will
cmd timeout as seen.

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* [Bug 207629] BISECTED Bluetooth: hci0: command 0x2042 tx timeout - suspend fails - Dell XPS 9300
       [not found] <bug-207629-62941@https.bugzilla.kernel.org/>
                   ` (3 preceding siblings ...)
  2020-05-11 19:11 ` bugzilla-daemon
@ 2020-05-12 16:00 ` bugzilla-daemon
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From: bugzilla-daemon @ 2020-05-12 16:00 UTC (permalink / raw)
  To: linux-bluetooth

https://bugzilla.kernel.org/show_bug.cgi?id=207629

--- Comment #8 from Len Brown (lenb@kernel.org) ---
I'm invoking suspend via sleepgraph, which does
"echo freeze > /sys/power/state" without any prior interaction
with any user-space distro hooks.

The distro in this case is Ubuntu 18.04, which comes pre-installed on this box.

Exactly what would you like me to observe, and how?

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* [Bug 207629] BISECTED Bluetooth: hci0: command 0x2042 tx timeout - suspend fails - Dell XPS 9300
       [not found] <bug-207629-62941@https.bugzilla.kernel.org/>
                   ` (4 preceding siblings ...)
  2020-05-12 16:00 ` bugzilla-daemon
@ 2020-05-12 22:12 ` bugzilla-daemon
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From: bugzilla-daemon @ 2020-05-12 22:12 UTC (permalink / raw)
  To: linux-bluetooth

https://bugzilla.kernel.org/show_bug.cgi?id=207629

--- Comment #9 from Abhishek Pandit-Subedi (abhishekpandit@chromium.org) ---
Could you collect grab dmesg w/ dynamic debug enabled? This will give us some
confirmation about what's going on in Bluetooth (especially since 0x0c1a is
sent before 0x2042 and that should be timing out first).

Dyndebug instructions:
https://www.kernel.org/doc/html/latest/admin-guide/dynamic-debug-howto.html

Please enable debug for files hci_core.c, hci_request.c and hci_event.c:
(for example: echo 'file hci_core.c +p' > <debugfs>/dynamic_debug/control)

Collecting this is probably the most useful observation of this bunch.

--

I'm not familiar with what power hooks Ubuntu uses but it might be worth
checking the systemd-sleep programs to see if any of them are going to rfkill
bluetooth:

https://wiki.archlinux.org/index.php/Power_management#Hooks_in_/usr/lib/systemd/system-sleep

--

You can also try running `rfkill event` in shell while suspending. This might
capture any service that is rfkill-ing without your knowledge.

http://manpages.ubuntu.com/manpages/bionic/man8/rfkill.8.html

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* [Bug 207629] BISECTED Bluetooth: hci0: command 0x2042 tx timeout - suspend fails - Dell XPS 9300
       [not found] <bug-207629-62941@https.bugzilla.kernel.org/>
                   ` (5 preceding siblings ...)
  2020-05-12 22:12 ` bugzilla-daemon
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From: bugzilla-daemon @ 2020-05-13  4:00 UTC (permalink / raw)
  To: linux-bluetooth

https://bugzilla.kernel.org/show_bug.cgi?id=207629

--- Comment #10 from Len Brown (lenb@kernel.org) ---
Created attachment 289101
  --> https://bugzilla.kernel.org/attachment.cgi?id=289101&action=edit
dmesg 5.7-rc5

# file 'hci_core.c +p' > /sys/kernel/debug/dynamic_debug/control
# file 'hci_request.c +p' > /sys/kernel/debug/dynamic_debug/control
# file 'hci_event.c +p' > /sys/kernel/debug/dynamic_debug/control

# sleepgraph -m freeze -multi 10 0

where the 1st and 5th suspend cycles succeeded, and the other 8 failed due to
bluetooth.

dmesg attached.

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* [Bug 207629] BISECTED Bluetooth: hci0: command 0x2042 tx timeout - suspend fails - Dell XPS 9300
       [not found] <bug-207629-62941@https.bugzilla.kernel.org/>
                   ` (6 preceding siblings ...)
  2020-05-13  4:00 ` bugzilla-daemon
@ 2020-05-13  4:11 ` bugzilla-daemon
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From: bugzilla-daemon @ 2020-05-13  4:11 UTC (permalink / raw)
  To: linux-bluetooth

https://bugzilla.kernel.org/show_bug.cgi?id=207629

Len Brown (lenb@kernel.org) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #289101|0                           |1
        is obsolete|                            |

--- Comment #11 from Len Brown (lenb@kernel.org) ---
Created attachment 289103
  --> https://bugzilla.kernel.org/attachment.cgi?id=289103&action=edit
dmesg 5.7-rc5

oops, copy/paste typo in my script, did it right this time:

# file 'hci_core.c +p' > /sys/kernel/debug/dynamic_debug/control
# file 'hci_request.c +p' > /sys/kernel/debug/dynamic_debug/control
# file 'hci_event.c +p' > /sys/kernel/debug/dynamic_debug/control

# sleepgraph -m freeze -multi 10 0

This time the 1st, 4, 5, 6th and 8th failed.

full dmesg attached.

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* [Bug 207629] BISECTED Bluetooth: hci0: command 0x2042 tx timeout - suspend fails - Dell XPS 9300
       [not found] <bug-207629-62941@https.bugzilla.kernel.org/>
                   ` (7 preceding siblings ...)
  2020-05-13  4:11 ` bugzilla-daemon
@ 2020-05-13  4:56 ` bugzilla-daemon
  2020-05-13 16:51 ` bugzilla-daemon
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From: bugzilla-daemon @ 2020-05-13  4:56 UTC (permalink / raw)
  To: linux-bluetooth

https://bugzilla.kernel.org/show_bug.cgi?id=207629

--- Comment #13 from Len Brown (lenb@kernel.org) ---
Re: rfkill

$ sudo rfkill
ID TYPE      DEVICE      SOFT      HARD
 0 wlan      phy0   unblocked unblocked
 1 bluetooth hci0   unblocked unblocked

$ sudo rfkill event
2020-05-13 00:41:30,772265-0400: idx 0 type 1 op 0 soft 0 hard 0
2020-05-13 00:41:30,772289-0400: idx 1 type 2 op 0 soft 0 hard 0

Here I ran 10 suspend/resume attempts (4 succeeded),
but rfkill didn't print any more lines.

If I manually run "bluetooth off", rfkill prints this:

2020-05-13 00:49:00,003851-0400: idx 1 type 2 op 2 soft 1 hard 0

If I manually run "bluetooth on", rfkill prints this:

2020-05-13 00:49:15,297390-0400: idx 1 type 2 op 2 soft 0 hard 0

I get the same two lines by turning bluetooth off/on in the
system settings GUI, no matter if the bluetooth program is available or not.

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* [Bug 207629] BISECTED Bluetooth: hci0: command 0x2042 tx timeout - suspend fails - Dell XPS 9300
       [not found] <bug-207629-62941@https.bugzilla.kernel.org/>
                   ` (8 preceding siblings ...)
  2020-05-13  4:56 ` bugzilla-daemon
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  2020-05-13 21:55 ` [Bug 207629] BISECTED Bluetooth: hci0: command 0x2042 tx timeout - suspend fails - Dell XPS 9300, Dell XPS 7390, Dell Inspiron 7386, Intel NUC7JYB bugzilla-daemon
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From: bugzilla-daemon @ 2020-05-13 16:51 UTC (permalink / raw)
  To: linux-bluetooth

https://bugzilla.kernel.org/show_bug.cgi?id=207629

--- Comment #14 from Abhishek Pandit-Subedi (abhishekpandit@chromium.org) ---
Ok -- this one is not a systemic problem as I predicted. This looks to be the
controller not responding to a specific command. In the logs below, the
controller is responding to everything except for 0x2042 and even that is
intermittent (responds to some 0x2042 but not others).

So this is increasingly starting to look like a controller firmware problem.
Looks like the Dell XPS 9300 uses an Intel AX wifi+bt chipset. You're using
firmware from 2019 and there's been several updates in the past few months.

Could you try a newer firmware to see if this is still happening? The latest
update was in April:
https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/commit/?id=c5ac1add86be7a90d0c573c957e37c610f3d7f25

If you can still repro it w/ new firmware, could you collect an hci trace when
it occurs?
`btmon -w <file location>` will collect the trace.

--
[  855.188312] PM: Preparing system for sleep (s2idle)
[  855.188792] hci0 opcode 0x0c1a plen 1
[  855.188793] skb len 4
[  855.188794] hci0 opcode 0x2042 plen 6
[  855.188795] skb len 9
[  855.188795] length 2
[  855.188799] hci0 cmd_cnt 1 cmd queued 2
[  855.188801] hci0 type 1 len 4
[  855.327410] hci0
[  855.327412] hci0 Event packet
[  855.327414] hci0 status 0x00
[  855.327415] hci0 opcode 0x0c1a
[  855.327416] opcode 0x0c1a status 0x00
[  855.327417] hci0 opcode 0x0c1a
[  855.327421] hci0 cmd_cnt 1 cmd queued 1
[  855.327422] hci0 type 1 len 9
[  855.352390] hci0
[  855.352391] hci0 Event packet
[  855.352392] hci0 status 0x00
[  855.352392] hci0 opcode 0x2042
[  855.352393] opcode 0x2042 status 0x00
[  855.352394] hci0 opcode 0x2042
[  855.352394] hci0: Request complete opcode=0x2042, status=0x0

# Notice that 0x2042 completes successfully

[  855.352407] hci0 opcode 0x0c05 plen 1
[  855.352408] skb len 4
[  855.352409] hci0 opcode 0x0c1a plen 1
[  855.352410] skb len 4
[  855.352411] hci0 opcode 0x2042 plen 6
[  855.352411] skb len 9
[  855.352412] hci0: LE passive scan with whitelist = 1
[  855.352412] hci0 opcode 0x2041 plen 8
[  855.352413] skb len 11
[  855.352413] hci0 opcode 0x2042 plen 6
[  855.352413] skb len 9
[  855.352414] length 5
[  855.352416] hci0 cmd_cnt 1 cmd queued 5
[  855.352417] hci0 type 1 len 4
[  855.353392] hci0
[  855.353392] hci0 Event packet
[  855.353394] hci0 opcode 0x0c05
[  855.353394] opcode 0x0c05 status 0x00
[  855.353395] hci0 opcode 0x0c05
[  855.353398] hci0 cmd_cnt 1 cmd queued 4
[  855.353398] hci0 type 1 len 4
[  855.354342] hci0
[  855.354343] hci0 Event packet
[  855.354343] hci0 status 0x00
[  855.354344] hci0 opcode 0x0c1a
[  855.354344] opcode 0x0c1a status 0x00
[  855.354345] hci0 opcode 0x0c1a
[  855.354346] hci0 cmd_cnt 1 cmd queued 3
[  855.354347] hci0 type 1 len 9
[  857.354012] hci0: Timed out waiting for suspend

# An early timeout in the suspend path

[  857.354014] hci0: Bit 5 is set
[  857.354096] hci0 opcode 0x0c05 plen 1
[  857.354098] skb len 4
[  857.354099] hci0 opcode 0x2042 plen 6
[  857.354099] skb len 9
[  857.354100] hci0: LE passive scan with whitelist = 1
[  857.354101] hci0 opcode 0x2041 plen 8
[  857.354101] skb len 11
[  857.354101] hci0 opcode 0x2042 plen 6
[  857.354102] skb len 9
[  857.354102] length 4
[  857.354107] hci0 cmd_cnt 0 cmd queued 6
[  857.385937] Bluetooth: hci0: command 0x2042 tx timeout
[  857.385938] Bluetooth: hci0: No way to reset. Ignoring and continuing

# Enabling passive scan failed

[  857.385941] hci0 cmd_cnt 1 cmd queued 6
[  857.385943] hci0 type 1 len 11
[  857.386342] hci0
[  857.386342] hci0 Event packet
[  857.386344] hci0 status 0x00
[  857.386344] hci0 opcode 0x2041
[  857.386345] opcode 0x2041 status 0x00
[  857.386345] hci0 opcode 0x2041
[  857.386347] hci0 cmd_cnt 1 cmd queued 5
[  857.386348] hci0 type 1 len 9
[  857.388421] hci0
[  857.388422] hci0 Event packet
[  857.388423] hci0 status 0x00
[  857.388424] hci0 opcode 0x2042
[  857.388425] opcode 0x2042 status 0x00
[  857.388425] hci0 opcode 0x2042
[  857.388428] hci0: Request complete opcode=0x2042, status=0x0

# 0x2042 completes successfully again

[  857.388431] hci0 cmd_cnt 1 cmd queued 4
[  857.388431] hci0 type 1 len 4
[  857.389383] hci0
[  857.389384] hci0 Event packet
[  857.389385] hci0 opcode 0x0c05
[  857.389386] opcode 0x0c05 status 0x00
[  857.389386] hci0 opcode 0x0c05
[  857.389389] hci0 cmd_cnt 1 cmd queued 3
[  857.389390] hci0 type 1 len 9
[  857.400353] hci0
[  857.400355] hci0 Event packet
[  857.400357] hci0 status 0x00
[  857.400358] hci0 opcode 0x2042
[  857.400359] opcode 0x2042 status 0x00
[  857.400359] hci0 opcode 0x2042
[  857.400363] hci0 cmd_cnt 1 cmd queued 2
[  857.400365] hci0 type 1 len 11
[  857.401330] hci0
[  857.401332] hci0 Event packet
[  857.401333] hci0 status 0x00
[  857.401334] hci0 opcode 0x2041
[  857.401334] opcode 0x2041 status 0x00
[  857.401335] hci0 opcode 0x2041
[  857.401337] hci0 cmd_cnt 1 cmd queued 1
[  857.401338] hci0 type 1 len 9
[  857.403349] hci0
[  857.403349] hci0 Event packet
[  857.403350] hci0 status 0x00
[  857.403351] hci0 opcode 0x2042
[  857.403351] opcode 0x2042 status 0x00
[  857.403352] hci0 opcode 0x2042
[  857.403353] hci0: Request complete opcode=0x2042, status=0x0
[  857.429909] PM: suspend exit

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* [Bug 207629] BISECTED Bluetooth: hci0: command 0x2042 tx timeout - suspend fails - Dell XPS 9300, Dell XPS 7390, Dell Inspiron 7386, Intel NUC7JYB
       [not found] <bug-207629-62941@https.bugzilla.kernel.org/>
                   ` (9 preceding siblings ...)
  2020-05-13 16:51 ` bugzilla-daemon
@ 2020-05-13 21:55 ` bugzilla-daemon
  2020-05-13 22:59 ` bugzilla-daemon
                   ` (15 subsequent siblings)
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From: bugzilla-daemon @ 2020-05-13 21:55 UTC (permalink / raw)
  To: linux-bluetooth

https://bugzilla.kernel.org/show_bug.cgi?id=207629

Len Brown (lenb@kernel.org) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|BISECTED Bluetooth: hci0:   |BISECTED Bluetooth: hci0:
                   |command 0x2042 tx timeout - |command 0x2042 tx timeout -
                   |suspend fails - Dell XPS    |suspend fails - Dell XPS
                   |9300                        |9300, Dell XPS 7390, Dell
                   |                            |Inspiron 7386, Intel
                   |                            |NUC7JYB

--- Comment #15 from Len Brown (lenb@kernel.org) ---
This same Linux Bluetooth regression is seen on additional platforms:

man:Dell Inc. | plat:XPS 13 7390 | cpu:Intel(R) Core(TM) i5-10210U CPU @
1.60GHz | bios:1.5.1 | biosdate:03/09/2020

man:Dell Inc. | plat:Inspiron 7386 | cpu:Intel(R) Core(TM) i7-8565U CPU @
1.80GHz | bios:1.2.0 | biosdate:12/05/2018

man:Intel Corporation | plat:NUC7JYB | cpu:Intel(R) Celeron(R) J4005 CPU @
2.00GHz | bios:JYGLKCPX.86A.0053.2019.1015.1510 | biosdate:10/15/2019

Their failure rates are slighly higher than the Dell 9300:

5.7.0-rc4+      otcpl-dell-7386-whl     freeze-x3547    3261    91.94%
5.7.0-rc4+      otcpl-nuc-kbl           freeze-x3207    2821    87.96%
5.7.0-rc4+      otcpl-dell-7390-cmlu    freeze-x2879    2275    79.02%
5.7.0-rc4+      lenb-Dell-XPS-13-9300   freeze-x2426    1429    58.90%

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* [Bug 207629] BISECTED Bluetooth: hci0: command 0x2042 tx timeout - suspend fails - Dell XPS 9300, Dell XPS 7390, Dell Inspiron 7386, Intel NUC7JYB
       [not found] <bug-207629-62941@https.bugzilla.kernel.org/>
                   ` (10 preceding siblings ...)
  2020-05-13 21:55 ` [Bug 207629] BISECTED Bluetooth: hci0: command 0x2042 tx timeout - suspend fails - Dell XPS 9300, Dell XPS 7390, Dell Inspiron 7386, Intel NUC7JYB bugzilla-daemon
@ 2020-05-13 22:59 ` bugzilla-daemon
  2020-05-13 23:15 ` bugzilla-daemon
                   ` (14 subsequent siblings)
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From: bugzilla-daemon @ 2020-05-13 22:59 UTC (permalink / raw)
  To: linux-bluetooth

https://bugzilla.kernel.org/show_bug.cgi?id=207629

--- Comment #16 from Len Brown (lenb@kernel.org) ---
re: firmware

dmesg showed this:

[    7.833706] Bluetooth: hci0: Minimum firmware build 1 week 10 2014
[    7.835192] Bluetooth: hci0: Found device firmware: intel/ibt-19-32-4.sfi
[    9.324793] Bluetooth: hci0: Waiting for firmware download to complete
[    9.325473] Bluetooth: hci0: Firmware loaded in 1459099 usecs
[    9.355517] Bluetooth: hci0: Firmware revision 0.0 build 62 week 31 2019

even though there are apparently higher numbered of ibt in /lib/firmware/intel.

I downloaded linux-firmware-c5ac1add86be7a90d0c573c957e37c610f3d7f25.tar.gz
and I replaced /lib/firmware/intel/ with the new copy, but it appears
that the driver did not find a newer version for this device:

[    7.766736] Bluetooth: hci0: Firmware revision 0.0 build 62 week 31 2019

What am I missing?

In any case, a bunch of machines are failing with the firmware that they are
running, when they used to work before this regression, and so this appears to
be more of a Linux regression, than a device-specific firmware issue?

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* [Bug 207629] BISECTED Bluetooth: hci0: command 0x2042 tx timeout - suspend fails - Dell XPS 9300, Dell XPS 7390, Dell Inspiron 7386, Intel NUC7JYB
       [not found] <bug-207629-62941@https.bugzilla.kernel.org/>
                   ` (11 preceding siblings ...)
  2020-05-13 22:59 ` bugzilla-daemon
@ 2020-05-13 23:15 ` bugzilla-daemon
  2020-05-14  1:47 ` bugzilla-daemon
                   ` (13 subsequent siblings)
  26 siblings, 0 replies; 27+ messages in thread
From: bugzilla-daemon @ 2020-05-13 23:15 UTC (permalink / raw)
  To: linux-bluetooth

https://bugzilla.kernel.org/show_bug.cgi?id=207629

--- Comment #17 from Abhishek Pandit-Subedi (abhishekpandit@chromium.org) ---
I found another patch in Chromium repository that seems to work around this
issue. It comes down to conditional cmd execution that is specific to the
passive scanning code. It explains why the issue occurs specifically on the
passive scanning and why it only happens sometimes.

https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/1636009

Could you try this patch and see if it fixes your issue? If yes, I'll try to
get it merged upstream.

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* [Bug 207629] BISECTED Bluetooth: hci0: command 0x2042 tx timeout - suspend fails - Dell XPS 9300, Dell XPS 7390, Dell Inspiron 7386, Intel NUC7JYB
       [not found] <bug-207629-62941@https.bugzilla.kernel.org/>
                   ` (12 preceding siblings ...)
  2020-05-13 23:15 ` bugzilla-daemon
@ 2020-05-14  1:47 ` bugzilla-daemon
  2020-06-03 14:32 ` bugzilla-daemon
                   ` (12 subsequent siblings)
  26 siblings, 0 replies; 27+ messages in thread
From: bugzilla-daemon @ 2020-05-14  1:47 UTC (permalink / raw)
  To: linux-bluetooth

https://bugzilla.kernel.org/show_bug.cgi?id=207629

--- Comment #18 from Abhishek Pandit-Subedi (abhishekpandit@chromium.org) ---
I looked at that patch again and it looks like it works around something that
is not upstreamed so please disregard comment #17.

--

re comment #16 - 

Checking on a recent build, the firmware revision I see is build 128 week 11
2020 (I think this is slightly older than the one I linked). I'm not sure why
you're seeing an older firmware.

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* [Bug 207629] BISECTED Bluetooth: hci0: command 0x2042 tx timeout - suspend fails - Dell XPS 9300, Dell XPS 7390, Dell Inspiron 7386, Intel NUC7JYB
       [not found] <bug-207629-62941@https.bugzilla.kernel.org/>
                   ` (13 preceding siblings ...)
  2020-05-14  1:47 ` bugzilla-daemon
@ 2020-06-03 14:32 ` bugzilla-daemon
  2020-06-03 14:37 ` bugzilla-daemon
                   ` (11 subsequent siblings)
  26 siblings, 0 replies; 27+ messages in thread
From: bugzilla-daemon @ 2020-06-03 14:32 UTC (permalink / raw)
  To: linux-bluetooth

https://bugzilla.kernel.org/show_bug.cgi?id=207629

--- Comment #19 from Len Brown (lenb@kernel.org) ---
My test case went away (Dell 9300)
After screwing around with /lib/firmware/intel
the failure went away, and restoring that directory, the failure doesn't come
back.

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* [Bug 207629] BISECTED Bluetooth: hci0: command 0x2042 tx timeout - suspend fails - Dell XPS 9300, Dell XPS 7390, Dell Inspiron 7386, Intel NUC7JYB
       [not found] <bug-207629-62941@https.bugzilla.kernel.org/>
                   ` (14 preceding siblings ...)
  2020-06-03 14:32 ` bugzilla-daemon
@ 2020-06-03 14:37 ` bugzilla-daemon
  2020-06-03 16:17 ` bugzilla-daemon
                   ` (10 subsequent siblings)
  26 siblings, 0 replies; 27+ messages in thread
From: bugzilla-daemon @ 2020-06-03 14:37 UTC (permalink / raw)
  To: linux-bluetooth

https://bugzilla.kernel.org/show_bug.cgi?id=207629

--- Comment #20 from Rafael J. Wysocki (rjw@rjwysocki.net) ---
(In reply to Abhishek Pandit-Subedi from comment #14)
> Ok -- this one is not a systemic problem as I predicted. This looks to be
> the controller not responding to a specific command. In the logs below, the
> controller is responding to everything except for 0x2042 and even that is
> intermittent (responds to some 0x2042 but not others).
> 
> So this is increasingly starting to look like a controller firmware problem.

Which totally doesn't matter.

Evidently, there are multiple cases in which the controller stops responding
and that must not be a reason for failing the system suspend (that may mean
refusing to suspend after a user has closed a laptop lid or similar).

The controller may not be able to suspend cleanly, but that doesn't matter.

There still is time to recover during system resume and if that fails, it will
just not work going forward and so be it.

Failing system suspend is not an option.  You can do that only in critical
situations.

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* [Bug 207629] BISECTED Bluetooth: hci0: command 0x2042 tx timeout - suspend fails - Dell XPS 9300, Dell XPS 7390, Dell Inspiron 7386, Intel NUC7JYB
       [not found] <bug-207629-62941@https.bugzilla.kernel.org/>
                   ` (15 preceding siblings ...)
  2020-06-03 14:37 ` bugzilla-daemon
@ 2020-06-03 16:17 ` bugzilla-daemon
  2020-06-04 14:53 ` bugzilla-daemon
                   ` (9 subsequent siblings)
  26 siblings, 0 replies; 27+ messages in thread
From: bugzilla-daemon @ 2020-06-03 16:17 UTC (permalink / raw)
  To: linux-bluetooth

https://bugzilla.kernel.org/show_bug.cgi?id=207629

--- Comment #21 from Abhishek Pandit-Subedi (abhishekpandit@chromium.org) ---
re #19 - Chromium had an internal patch that was conditionally sending the
passive scanning command. After removing it, we were getting command
disallowed. This is very likely what you were seeing. There's a patch fixing
this on the mailing list now: https://patchwork.kernel.org/patch/11582831/

re #20 - You make a good point. A second problem I encountered with higher
usage of this code is that if the controller stops responding (i.e. it crashes)
and we can't reset it, it will also prevent suspend. This one is unacceptable.

Likely, the fix from Bluetooth end would be just to always allow suspend but
log an error here:
https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git/tree/net/bluetooth/hci_core.c#n3368

Expect a patch today on the mailing list with a fix for this.

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* [Bug 207629] BISECTED Bluetooth: hci0: command 0x2042 tx timeout - suspend fails - Dell XPS 9300, Dell XPS 7390, Dell Inspiron 7386, Intel NUC7JYB
       [not found] <bug-207629-62941@https.bugzilla.kernel.org/>
                   ` (16 preceding siblings ...)
  2020-06-03 16:17 ` bugzilla-daemon
@ 2020-06-04 14:53 ` bugzilla-daemon
  2020-06-25 14:47 ` bugzilla-daemon
                   ` (8 subsequent siblings)
  26 siblings, 0 replies; 27+ messages in thread
From: bugzilla-daemon @ 2020-06-04 14:53 UTC (permalink / raw)
  To: linux-bluetooth

https://bugzilla.kernel.org/show_bug.cgi?id=207629

Rafael J. Wysocki (rjw@rjwysocki.net) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |rjw@rjwysocki.net

--- Comment #22 from Rafael J. Wysocki (rjw@rjwysocki.net) ---
Patch to test: https://patchwork.kernel.org/patch/11586221/

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* [Bug 207629] BISECTED Bluetooth: hci0: command 0x2042 tx timeout - suspend fails - Dell XPS 9300, Dell XPS 7390, Dell Inspiron 7386, Intel NUC7JYB
       [not found] <bug-207629-62941@https.bugzilla.kernel.org/>
                   ` (17 preceding siblings ...)
  2020-06-04 14:53 ` bugzilla-daemon
@ 2020-06-25 14:47 ` bugzilla-daemon
  2020-06-25 14:53 ` bugzilla-daemon
                   ` (7 subsequent siblings)
  26 siblings, 0 replies; 27+ messages in thread
From: bugzilla-daemon @ 2020-06-25 14:47 UTC (permalink / raw)
  To: linux-bluetooth

https://bugzilla.kernel.org/show_bug.cgi?id=207629

Todd Brandt (todd.e.brandt@linux.intel.com) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |todd.e.brandt@linux.intel.c
                   |                            |om

--- Comment #23 from Todd Brandt (todd.e.brandt@linux.intel.com) ---
I tried running this patch over the 5.8.0-rc2 upstream kernel and there was no
appreciable difference in the occurrence of this error. I have 5 machines (in
addition to len's) that have been getting this error since 5.7.0-rc1.

KERNEL(w patch) HOST                    TESTS           FAILS
5.8.0-rc2+      otcpl-dell-7386-whl     freeze-x1141    1073    94.04%
5.8.0-rc2+      otcpl-cml-s-1           freeze-x1064    983     92.39%
5.8.0-rc2+      otcpl-dell-7390-cmlu    freeze-x1631    1419    87.00%
5.8.0-rc2+      otcpl-nuc-glk           freeze-x1083    929     85.78%
5.8.0-rc2+      otcpl-cml-s-2           freeze-x1172    869     74.15%

Without the patch on 5.8.0-rc1 I get this:

KERNEL(w/o patch) HOST                   TESTS          FAILS
5.8.0-rc1+      otcpl-dell-7386-whl      freeze-x2876   2698    93.81%
5.8.0-rc1+      otcpl-cml-s-1            freeze-x2359   2128    90.21%
5.8.0-rc1+      otcpl-dell-7390-cmlu     freeze-x3655   3268    89.41%
5.8.0-rc1+      otcpl-nuc-glk            freeze-x1089   911     83.65%
5.8.0-rc1+      otcpl-cml-s-2            freeze-x2748   1991    72.45%

Len you'll have to try it on your machine.

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* [Bug 207629] BISECTED Bluetooth: hci0: command 0x2042 tx timeout - suspend fails - Dell XPS 9300, Dell XPS 7390, Dell Inspiron 7386, Intel NUC7JYB
       [not found] <bug-207629-62941@https.bugzilla.kernel.org/>
                   ` (18 preceding siblings ...)
  2020-06-25 14:47 ` bugzilla-daemon
@ 2020-06-25 14:53 ` bugzilla-daemon
  2020-06-26 17:31 ` bugzilla-daemon
                   ` (6 subsequent siblings)
  26 siblings, 0 replies; 27+ messages in thread
From: bugzilla-daemon @ 2020-06-25 14:53 UTC (permalink / raw)
  To: linux-bluetooth

https://bugzilla.kernel.org/show_bug.cgi?id=207629

--- Comment #24 from Todd Brandt (todd.e.brandt@linux.intel.com) ---
Here's a comprehensive list of all the machines in our power lab that are
seeing this issue. It started in 5.7.0-rc1:

5.7.0-rc1+      otcpl-dell-7386-whl     freeze-x4344    3892    89.59%
5.7.0-rc1+      otcpl-nuc-kbl           freeze-x984     850     86.38%
5.7.0-rc1+      lenb-Dell-XPS-13-9300   freeze-x607     359     59.14%
5.7.0-rc2+      otcpl-dell-7386-whl     freeze-x4341    3850    88.69%
5.7.0-rc2+      otcpl-cml-u             freeze-x2070    1797    86.81%
5.7.0-rc2+      otcpl-nuc-kbl           freeze-x3697    3164    85.58%
5.7.0-rc2+      lenb-Dell-XPS-13-9300   freeze-x402     214     53.23%
5.7.0-rc3+      otcpl-cml-u             freeze-x4020    3667    91.22%
5.7.0-rc3+      otcpl-dell-7386-whl     freeze-x4404    3979    90.35%
5.7.0-rc3+      otcpl-nuc-kbl           freeze-x3777    3288    87.05%
5.7.0-rc3+      lenb-Dell-XPS-13-9300   freeze-x612     359     58.66%
5.7.0-rc4+      otcpl-cml-u             freeze-x3460    3185    92.05%
5.7.0-rc4+      otcpl-dell-7386-whl     freeze-x3547    3261    91.94%
5.7.0-rc4+      otcpl-nuc-kbl           freeze-x3207    2821    87.96%
5.7.0-rc4+      otcpl-dell-7390-cmlu    freeze-x2879    2275    79.02%
5.7.0-rc4+      lenb-Dell-XPS-13-9300   freeze-x2426    1429    58.90%
5.7.0-rc4+      lenb-Dell-XPS-13-9300   freeze-x931     487     52.31%
5.7.0-rc5+      otcpl-nuc-kbl           freeze-x3254    2950    90.66%
5.7.0-rc5+      otcpl-dell-7386-whl     freeze-x3769    3400    90.21%
5.7.0-rc5+      otcpl-cml-u             freeze-x551     479     86.93%
5.7.0-rc5+      otcpl-dell-3493-icl     freeze-x3628    2992    82.47%
5.7.0-rc5+      otcpl-cml-s-1           freeze-x2949    1675    56.80%
5.7.0-rc5+      lenb-Dell-XPS-13-9300   freeze-x20      11      55.00%
5.7.0-rc6+      otcpl-dell-7386-whl     freeze-x3762    3417    90.83%
5.7.0-rc6+      otcpl-cml-u             freeze-x2420    2181    90.12%
5.7.0-rc6+      otcpl-nuc-glk           freeze-x1049    881     83.98%
5.7.0-rc6+      otcpl-cml-s-1           freeze-x2862    1581    55.24%
5.7.0-rc7+      otcpl-dell-7386-whl     freeze-x3818    3529    92.43%
5.7.0-rc7+      otcpl-nuc-glk           freeze-x3101    2637    85.04%
5.7.0-rc7+      otcpl-dell-7390-cmlu    freeze-x2971    2508    84.42%
5.7.0-rc7+      otcpl-cml-s-1           freeze-x1958    1649    84.22%
5.7.0-rc7+      otcpl-cml-s-2           freeze-x2920    1634    55.96%
5.7.0+          otcpl-dell-7386-whl     freeze-x3836    3550    92.54%
5.7.0+          otcpl-dell-7386-whl     freeze-x3804    3499    91.98%
5.7.0+          otcpl-cml-u             freeze-x1145    1044    91.18%
5.7.0+          otcpl-nuc-glk           freeze-x3160    2815    89.08%
5.7.0+          otcpl-nuc-glk           freeze-x3247    2854    87.90%
5.7.0+          otcpl-dell-7390-cmlu    freeze-x2966    2530    85.30%
5.7.0+          otcpl-dell-7390-cmlu    freeze-x2911    2395    82.27%
5.7.0+          otcpl-cml-s-2           freeze-x2879    1619    56.23%

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* [Bug 207629] BISECTED Bluetooth: hci0: command 0x2042 tx timeout - suspend fails - Dell XPS 9300, Dell XPS 7390, Dell Inspiron 7386, Intel NUC7JYB
       [not found] <bug-207629-62941@https.bugzilla.kernel.org/>
                   ` (19 preceding siblings ...)
  2020-06-25 14:53 ` bugzilla-daemon
@ 2020-06-26 17:31 ` bugzilla-daemon
  2020-07-14  0:20 ` bugzilla-daemon
                   ` (5 subsequent siblings)
  26 siblings, 0 replies; 27+ messages in thread
From: bugzilla-daemon @ 2020-06-26 17:31 UTC (permalink / raw)
  To: linux-bluetooth

https://bugzilla.kernel.org/show_bug.cgi?id=207629

--- Comment #25 from Abhishek Pandit-Subedi (abhishekpandit@chromium.org) ---
Todd, can you confirm you picked up both
https://patchwork.kernel.org/patch/11582831/ and
https://patchwork.kernel.org/patch/11586221/?

Also, what kind of failure are you seeing? Is it failing to enter suspend
completely? Is it waking spuriously? Is it not entering S0ix? (sent up a fix
for this recently)

It would be helpful to have logs for a failure case. Could you collect some
logs with dynamic debug for BT (see comment #11) and collect a btmon trace
(btmon -w /tmp/btsnoop) when reproducing this issue?

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* [Bug 207629] BISECTED Bluetooth: hci0: command 0x2042 tx timeout - suspend fails - Dell XPS 9300, Dell XPS 7390, Dell Inspiron 7386, Intel NUC7JYB
       [not found] <bug-207629-62941@https.bugzilla.kernel.org/>
                   ` (20 preceding siblings ...)
  2020-06-26 17:31 ` bugzilla-daemon
@ 2020-07-14  0:20 ` bugzilla-daemon
  2020-08-20 13:07 ` bugzilla-daemon
                   ` (4 subsequent siblings)
  26 siblings, 0 replies; 27+ messages in thread
From: bugzilla-daemon @ 2020-07-14  0:20 UTC (permalink / raw)
  To: linux-bluetooth

https://bugzilla.kernel.org/show_bug.cgi?id=207629

--- Comment #26 from Todd Brandt (todd.e.brandt@linux.intel.com) ---
Hi Pandit, I only used one patch on the 5.8.0-rc2 build, sorry.

This time around a applied both patches and ran on 5.8.0-rc3 and 5.8.0-rc4 and
am very happy to say the bug has completely disappeared! :)

These are the machines that are now working (all that were affected):

otcpl-dell-7386-whl
otcpl-nuc-glk
otcpl-cml-s-1
otcpl-dell-7390-cmlu
otcpl-nuc-glk
otcpl-cml-s-2
otcpl-cml-u

So this fix is confirmed, thanks!

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* [Bug 207629] BISECTED Bluetooth: hci0: command 0x2042 tx timeout - suspend fails - Dell XPS 9300, Dell XPS 7390, Dell Inspiron 7386, Intel NUC7JYB
       [not found] <bug-207629-62941@https.bugzilla.kernel.org/>
                   ` (21 preceding siblings ...)
  2020-07-14  0:20 ` bugzilla-daemon
@ 2020-08-20 13:07 ` bugzilla-daemon
  2020-08-20 13:38 ` bugzilla-daemon
                   ` (3 subsequent siblings)
  26 siblings, 0 replies; 27+ messages in thread
From: bugzilla-daemon @ 2020-08-20 13:07 UTC (permalink / raw)
  To: linux-bluetooth

https://bugzilla.kernel.org/show_bug.cgi?id=207629

Artem S. Tashkinov (aros@gmx.com) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |aros@gmx.com
             Blocks|178231                      |208975


Referenced Bugs:

https://bugzilla.kernel.org/show_bug.cgi?id=178231
[Bug 178231] Meta-bug: Linux suspend-to-mem and freeze performance optimization
https://bugzilla.kernel.org/show_bug.cgi?id=208975
[Bug 208975] The bluetooth module prevents suspend: Bluetooth: hci0: command
0x2042 tx timeout
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* [Bug 207629] BISECTED Bluetooth: hci0: command 0x2042 tx timeout - suspend fails - Dell XPS 9300, Dell XPS 7390, Dell Inspiron 7386, Intel NUC7JYB
       [not found] <bug-207629-62941@https.bugzilla.kernel.org/>
                   ` (22 preceding siblings ...)
  2020-08-20 13:07 ` bugzilla-daemon
@ 2020-08-20 13:38 ` bugzilla-daemon
  2020-08-20 16:59 ` bugzilla-daemon
                   ` (2 subsequent siblings)
  26 siblings, 0 replies; 27+ messages in thread
From: bugzilla-daemon @ 2020-08-20 13:38 UTC (permalink / raw)
  To: linux-bluetooth

https://bugzilla.kernel.org/show_bug.cgi?id=207629

--- Comment #27 from Artem S. Tashkinov (aros@gmx.com) ---
(In reply to Abhishek Pandit-Subedi from comment #25)
> Todd, can you confirm you picked up both
> https://patchwork.kernel.org/patch/11582831/ and
> https://patchwork.kernel.org/patch/11586221/?
> 
> Also, what kind of failure are you seeing? Is it failing to enter suspend
> completely? Is it waking spuriously? Is it not entering S0ix? (sent up a fix
> for this recently)
> 
> It would be helpful to have logs for a failure case. Could you collect some
> logs with dynamic debug for BT (see comment #11) and collect a btmon trace
> (btmon -w /tmp/btsnoop) when reproducing this issue?

Why haven't these patches been merged with stable? Linux 5.7.15 has neither of
them.

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* [Bug 207629] BISECTED Bluetooth: hci0: command 0x2042 tx timeout - suspend fails - Dell XPS 9300, Dell XPS 7390, Dell Inspiron 7386, Intel NUC7JYB
       [not found] <bug-207629-62941@https.bugzilla.kernel.org/>
                   ` (23 preceding siblings ...)
  2020-08-20 13:38 ` bugzilla-daemon
@ 2020-08-20 16:59 ` bugzilla-daemon
  2020-10-13 14:45 ` bugzilla-daemon
  2020-10-13 14:46 ` bugzilla-daemon
  26 siblings, 0 replies; 27+ messages in thread
From: bugzilla-daemon @ 2020-08-20 16:59 UTC (permalink / raw)
  To: linux-bluetooth

https://bugzilla.kernel.org/show_bug.cgi?id=207629

--- Comment #28 from Abhishek Pandit-Subedi (abhishekpandit@chromium.org) ---
Hi Artem,

5.7.16 got one of the fixes but not the other. I've sent a follow-up email to
netdev@ to add the missing one and cc-ed you.

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* [Bug 207629] BISECTED Bluetooth: hci0: command 0x2042 tx timeout - suspend fails - Dell XPS 9300, Dell XPS 7390, Dell Inspiron 7386, Intel NUC7JYB
       [not found] <bug-207629-62941@https.bugzilla.kernel.org/>
                   ` (24 preceding siblings ...)
  2020-08-20 16:59 ` bugzilla-daemon
@ 2020-10-13 14:45 ` bugzilla-daemon
  2020-10-13 14:46 ` bugzilla-daemon
  26 siblings, 0 replies; 27+ messages in thread
From: bugzilla-daemon @ 2020-10-13 14:45 UTC (permalink / raw)
  To: linux-bluetooth

https://bugzilla.kernel.org/show_bug.cgi?id=207629

Artem S. Tashkinov (aros@gmx.com) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |CODE_FIX

--- Comment #29 from Artem S. Tashkinov (aros@gmx.com) ---
Fixed in 5.8.

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^ permalink raw reply	[flat|nested] 27+ messages in thread

* [Bug 207629] BISECTED Bluetooth: hci0: command 0x2042 tx timeout - suspend fails - Dell XPS 9300, Dell XPS 7390, Dell Inspiron 7386, Intel NUC7JYB
       [not found] <bug-207629-62941@https.bugzilla.kernel.org/>
                   ` (25 preceding siblings ...)
  2020-10-13 14:45 ` bugzilla-daemon
@ 2020-10-13 14:46 ` bugzilla-daemon
  26 siblings, 0 replies; 27+ messages in thread
From: bugzilla-daemon @ 2020-10-13 14:46 UTC (permalink / raw)
  To: linux-bluetooth

https://bugzilla.kernel.org/show_bug.cgi?id=207629

--- Comment #30 from Artem S. Tashkinov (aros@gmx.com) ---
*** Bug 208975 has been marked as a duplicate of this bug. ***

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You are receiving this mail because:
You are the assignee for the bug.

^ permalink raw reply	[flat|nested] 27+ messages in thread

end of thread, other threads:[~2020-10-13 14:46 UTC | newest]

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2020-05-11  3:05 ` [Bug 207629] BISECTED Bluetooth: hci0: command 0x2042 tx timeout - suspend fails - Dell XPS 9300 bugzilla-daemon
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2020-05-13 16:51 ` bugzilla-daemon
2020-05-13 21:55 ` [Bug 207629] BISECTED Bluetooth: hci0: command 0x2042 tx timeout - suspend fails - Dell XPS 9300, Dell XPS 7390, Dell Inspiron 7386, Intel NUC7JYB bugzilla-daemon
2020-05-13 22:59 ` bugzilla-daemon
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2020-05-14  1:47 ` bugzilla-daemon
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