[Bluez-devel] Oops with multiple hcitool commands

[Bluez-devel] Oops with multiple hcitool commands

[Williams, Richard]

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Hello All,
 
I am building a project that will use multiple HCI devices on a single
Linux PC. I have a USB hub, and several Linksys Bluetooth dongles. On my
PC I open two terminal windows and then run the following commands:
 
window 1#  hcitool -i hci0 info 00:18:C5:2C:5E:C2
window 2#  hcitool -i hci1 info 00:18:C5:2C:5E:C2
 
The two commands must run simultaneously. Just these two commands run
quickly one after the other will almost always cause the oops. The
problem does not occur if the two hcitool info commands are examining
different remote devices. You must go after the same remote device.
 
Its very easy to demonstrate the problem with two simple scripts:
 
window 1 # while true
> do
> hcitool -i hci0 info 00:18:C5:2C:5E:C2
> sleep 1
> done
 
and the same script in window 2 using hci1. Within a few seconds, you
will get a collision and then oops!
 
 
I am running Fedora Core 2.6.19-1.2895.fc6
Bluez-libs-3.9
Bluez-utils-3.9
 
I realize that two hcitool info commands toward the same remote device
is probably not a good thing to do, but it should not cause an oops!
 
Thanks very much.
 
Rich Williams
New Jersey, USA
 
 
 
 
 

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Re: [Bluez-devel] Oops with multiple hcitool commands

[Marcel Holtmann]

Hi Richard,

> I am building a project that will use multiple HCI devices on a single
> Linux PC. I have a USB hub, and several Linksys Bluetooth dongles. On
> my PC I open two terminal windows and then run the following commands:
>  
> window 1#  hcitool -i hci0 info 00:18:C5:2C:5E:C2
> window 2#  hcitool -i hci1 info 00:18:C5:2C:5E:C2
>  
> The two commands must run simultaneously. Just these two commands run
> quickly one after the other will almost always cause the oops. The
> problem does not occur if the two hcitool info commands are examining
> different remote devices. You must go after the same remote device.

please post the oops message from the kernel.

Regards

Marcel



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Re: [Bluez-devel] Oops with multiple hcitool commands

[Williams, Richard]

 
Greetings Marcel,

When the oops occurs, I lose the keyboard on my PC and I can only reboot
with the mouse.

So, the best I can do is to tail -f /var/log/messages in another
terminal window, and then copy the oops output to send to you. Is there
another way ??

So I did 
hcitool -i hci0 info xx:xx:xx:xx:xx:xx in one window,
hcitool -i hci1 info xx:xx:xx:xx:xx:xx in a second window,

Note that the remote BD address is the same, but two USB dongles are
installed.

Here is the output from /var/log/messages. I hope this is sufficient for
what you need.

Feb 13 08:34:42 eaton-230-112 pcscd: winscard.c:219:SCardConnect()
Reader E-Gate 0 0 Not Found
Feb 13 08:34:42 eaton-230-112 last message repeated 3 times
Feb 13 08:34:44 eaton-230-112 kernel: mtrr: 0xc0000000,0x8000000
overlaps existing 0xc0000000,0x4000000
Feb 13 08:34:44 eaton-230-112 last message repeated 2 times
Feb 13 08:34:44 eaton-230-112 kernel: [drm] Setting GART location based
on new memory map
Feb 13 08:34:44 eaton-230-112 kernel: [drm] Loading R300 Microcode
Feb 13 08:34:44 eaton-230-112 kernel: [drm] writeback test succeeded in
1 usecs
Feb 13 08:35:00 eaton-230-112 gconfd (rich-3341): starting (version
2.14.0), pid 3341 user 'rich'
Feb 13 08:35:00 eaton-230-112 gconfd (rich-3341): Resolved address
"xml:readonly:/etc/gconf/gconf.xml.mandatory" to a read-only
configuration source at position 0
Feb 13 08:35:00 eaton-230-112 gconfd (rich-3341): Resolved address
"xml:readwrite:/home/rich/.gconf" to a writable configuration source at
position 1
Feb 13 08:35:00 eaton-230-112 gconfd (rich-3341): Resolved address
"xml:readonly:/etc/gconf/gconf.xml.defaults" to a read-only
configuration source at position 2
Feb 13 08:35:01 eaton-230-112 gconfd (rich-3341): Resolved address
"xml:readwrite:/home/rich/.gconf" to a writable configuration source at
position 0
Feb 13 08:35:02 eaton-230-112 hcid[2720]: Default passkey agent (:1.8,
/org/bluez/applet) registered
Feb 13 08:35:04 eaton-230-112 pcscd: winscard.c:219:SCardConnect()
Reader E-Gate 0 0 Not Found
Feb 13 08:35:04 eaton-230-112 last message repeated 4 times
Feb 13 08:36:16 eaton-230-112 kernel: add_conn: Failed to register
connection device
Feb 13 08:36:17 eaton-230-112 kernel: BUG: unable to handle kernel NULL
pointer dereference at virtual address 0000001c
Feb 13 08:36:17 eaton-230-112 kernel:  printing eip:
Feb 13 08:36:17 eaton-230-112 kernel: c061b254
Feb 13 08:36:17 eaton-230-112 kernel: *pde = 0326c067
Feb 13 08:36:17 eaton-230-112 kernel: Oops: 0000 [#1]
Feb 13 08:36:17 eaton-230-112 kernel: SMP 
Feb 13 08:36:17 eaton-230-112 kernel: last sysfs file:
/module/libata/version
Feb 13 08:36:17 eaton-230-112 kernel: Modules linked in: autofs4 hidp
rfcomm l2cap sunrpc ip_conntrack_netbios_ns ipt_REJECT xt_state
ip_conntrack nfnetlink iptable_filter ip_tables ip6t_REJECT xt_tcpudp
ip6table_filter ip6_tables x_tables dm_multipath video sbs i2c_ec dock
button battery ac radeon drm ipv6 lp snd_intel8x0m joydev sg serio_raw
floppy snd_intel8x0 snd_ac97_codec snd_ac97_bus snd_seq_dummy
snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device ipw2200
snd_pcm_oss snd_mixer_oss snd_pcm ieee80211 snd_timer ieee80211_crypt
snd soundcore snd_page_alloc ide_cd iTCO_wdt i2c_i801 pcspkr cdrom
ohci1394 i2c_core ieee1394 tg3 hci_usb nsc_ircc bluetooth irda crc_ccitt
parport_pc parport dm_snapshot dm_zero dm_mirror dm_mod ahci ata_piix
libata sd_mod scsi_mod ext3 jbd ehci_hcd ohci_hcd uhci_hcd
Feb 13 08:36:17 eaton-230-112 kernel: CPU:    0
Feb 13 08:36:17 eaton-230-112 kernel: EIP:    0060:[<c061b254>]    Not
tainted VLI
Feb 13 08:36:17 eaton-230-112 kernel: EFLAGS: 00010282
(2.6.19-1.2895.fc6 #1)
Feb 13 08:36:17 eaton-230-112 kernel: EIP is at klist_del+0x9/0x3b
Feb 13 08:36:17 eaton-230-112 kernel: eax: 00000000   ebx: 00000000
ecx: dfecf000   edx: 00000282
Feb 13 08:36:17 eaton-230-112 kernel: esi: d79098e8   edi: c14d4dc0
ebp: da8dc9dc   esp: dfecff44
Feb 13 08:36:17 eaton-230-112 kernel: ds: 007b   es: 007b   ss: 0068
Feb 13 08:36:17 eaton-230-112 kernel: Process events/0 (pid: 5,
ti=dfecf000 task=c14de030 task.ti=dfecf000)
Feb 13 08:36:17 eaton-230-112 kernel: Stack: d7909898 d79098c8 c14d4dc0
c0554802 d7909898 d790989c c14d4dc0 00000282 
Feb 13 08:36:17 eaton-230-112 kernel:        c043271b 00000282 c14d4dc0
c14d4de0 e098c244 d7909800 c14d4de0 c14d4dc0 
Feb 13 08:36:17 eaton-230-112 kernel:        c14d4dd8 00000000 c04330e0
00000001 00000000 00000000 00010000 00000000 
Feb 13 08:36:17 eaton-230-112 kernel: Call Trace:
Feb 13 08:36:17 eaton-230-112 kernel:  [<c0554802>]
device_del+0x18/0x19a
Feb 13 08:36:17 eaton-230-112 kernel:  [<c043271b>]
run_workqueue+0x97/0xdd
Feb 13 08:36:17 eaton-230-112 kernel:  [<c04330e0>]
worker_thread+0xd9/0x10d
Feb 13 08:36:17 eaton-230-112 kernel:  [<c0435660>] kthread+0xc0/0xec
Feb 13 08:36:17 eaton-230-112 kernel:  [<c0405257>]
kernel_thread_helper+0x7/0x10
Feb 13 08:36:17 eaton-230-112 kernel:  =======================
Feb 13 08:36:17 eaton-230-112 kernel: Code: 8b 04 24 89 46 08 8b 06 e8
87 22 00 00 85 ed 74 08 85 ff 74 04 89 f8 ff d5 8b 04 24 5a 5b 5e 5f 5d
c3 57 56 89 c6 53 8b 18 89 d8 <8b> 7b 1c e8 8e 22 00 00 89 f0 e8 6e ff
ff ff 85 c0 74 11 89 d8 
Feb 13 08:36:17 eaton-230-112 kernel: EIP: [<c061b254>]
klist_del+0x9/0x3b SS:ESP 0068:dfecff44




Many thanks and best regards,

Rich Williams




-----Original Message-----
From: bluez-devel-bounces@lists.sourceforge.net
[mailto:bluez-devel-bounces@lists.sourceforge.net] On Behalf Of Marcel
Holtmann
Sent: Monday, February 12, 2007 2:33 PM
To: BlueZ development
Subject: Re: [Bluez-devel] Oops with multiple hcitool commands

Hi Richard,

> I am building a project that will use multiple HCI devices on a single

> Linux PC. I have a USB hub, and several Linksys Bluetooth dongles. On 
> my PC I open two terminal windows and then run the following commands:
>  
> window 1#  hcitool -i hci0 info 00:18:C5:2C:5E:C2 window 2#  hcitool 
> -i hci1 info 00:18:C5:2C:5E:C2
>  
> The two commands must run simultaneously. Just these two commands run 
> quickly one after the other will almost always cause the oops. The 
> problem does not occur if the two hcitool info commands are examining 
> different remote devices. You must go after the same remote device.

please post the oops message from the kernel.

Regards

Marcel



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Re: [Bluez-devel] Oops with multiple hcitool commands

[Marcel Holtmann]

Hi Richard,

> When the oops occurs, I lose the keyboard on my PC and I can only reboot
> with the mouse.
> 
> So, the best I can do is to tail -f /var/log/messages in another
> terminal window, and then copy the oops output to send to you. Is there
> another way ??
> 
> So I did 
> hcitool -i hci0 info xx:xx:xx:xx:xx:xx in one window,
> hcitool -i hci1 info xx:xx:xx:xx:xx:xx in a second window,
> 
> Note that the remote BD address is the same, but two USB dongles are
> installed.
> 
> Here is the output from /var/log/messages. I hope this is sufficient for
> what you need.

my guess is that it might be fixed with 2.6.20 kernel. Please try that
kernel.

Regards

Marcel



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Re: [Bluez-devel] Oops with multiple hcitool commands

[Williams, Richard]

Marcel, 

Thank you for the quick response. I'll try that kernel when I get a
chance. Right now I'm up to my neck with development issues on my "real"
project - you know, the project that pays my salary -)

Regards,

Rich Williams


-----Original Message-----
From: bluez-devel-bounces@lists.sourceforge.net
[mailto:bluez-devel-bounces@lists.sourceforge.net] On Behalf Of Marcel
Holtmann
Sent: Tuesday, February 13, 2007 9:05 AM
To: BlueZ development
Subject: Re: [Bluez-devel] Oops with multiple hcitool commands

Hi Richard,

> When the oops occurs, I lose the keyboard on my PC and I can only 
> reboot with the mouse.
> 
> So, the best I can do is to tail -f /var/log/messages in another 
> terminal window, and then copy the oops output to send to you. Is 
> there another way ??
> 
> So I did
> hcitool -i hci0 info xx:xx:xx:xx:xx:xx in one window, hcitool -i hci1 
> info xx:xx:xx:xx:xx:xx in a second window,
> 
> Note that the remote BD address is the same, but two USB dongles are 
> installed.
> 
> Here is the output from /var/log/messages. I hope this is sufficient 
> for what you need.

my guess is that it might be fixed with 2.6.20 kernel. Please try that
kernel.

Regards

Marcel



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Re: [Bluez-devel] Oops with multiple hcitool commands

[Marcel Holtmann]

Hi Richard,

> Thank you for the quick response. I'll try that kernel when I get a
> chance. Right now I'm up to my neck with development issues on my "real"
> project - you know, the project that pays my salary -)

the Fedora Core 6 should re-sync to 2.6.20 this week if you are lucky.

Regards

Marcel



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Re: [Bluez-devel] Oops with multiple hcitool commands

[Williams, Richard]

Marcel,

Just a quick update on this problem. The 2.6.20 kernel finally became
available from Fedora Core. I installed it this morning, and as you
predicted, the problem has been fixed.

And again, thank you for your support.

Best Regards,

Rich Williams



-----Original Message-----
From: bluez-devel-bounces@lists.sourceforge.net
[mailto:bluez-devel-bounces@lists.sourceforge.net] On Behalf Of Marcel
Holtmann
Sent: Tuesday, February 13, 2007 9:13 AM
To: BlueZ development
Subject: Re: [Bluez-devel] Oops with multiple hcitool commands

Hi Richard,

> Thank you for the quick response. I'll try that kernel when I get a 
> chance. Right now I'm up to my neck with development issues on my
"real"
> project - you know, the project that pays my salary -)

the Fedora Core 6 should re-sync to 2.6.20 this week if you are lucky.

Regards

Marcel



-----Original Message-----
From: bluez-devel-bounces@lists.sourceforge.net
[mailto:bluez-devel-bounces@lists.sourceforge.net] On Behalf Of Marcel
Holtmann
Sent: Tuesday, February 13, 2007 9:05 AM
To: BlueZ development
Subject: Re: [Bluez-devel] Oops with multiple hcitool commands

Hi Richard,

> When the oops occurs, I lose the keyboard on my PC and I can only 
> reboot with the mouse.
> 
> So, the best I can do is to tail -f /var/log/messages in another 
> terminal window, and then copy the oops output to send to you. Is 
> there another way ??
> 
> So I did
> hcitool -i hci0 info xx:xx:xx:xx:xx:xx in one window, hcitool -i hci1 
> info xx:xx:xx:xx:xx:xx in a second window,
> 
> Note that the remote BD address is the same, but two USB dongles are 
> installed.
> 
> Here is the output from /var/log/messages. I hope this is sufficient 
> for what you need.

my guess is that it might be fixed with 2.6.20 kernel. Please try that
kernel.

Regards

Marcel





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