* [Bug 210263] New: brightness device returns ENXIO (?) on brightness restore at boot, with bootoption "quiet"
@ 2020-11-18 22:33 bugzilla-daemon
2021-02-02 11:32 ` [Bug 210263] " bugzilla-daemon
` (7 more replies)
0 siblings, 8 replies; 9+ messages in thread
From: bugzilla-daemon @ 2020-11-18 22:33 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=210263
Bug ID: 210263
Summary: brightness device returns ENXIO (?) on brightness
restore at boot, with bootoption "quiet"
Product: Drivers
Version: 2.5
Kernel Version: 5.9.8
Hardware: x86-64
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Video(DRI - non Intel)
Assignee: drivers_video-dri@kernel-bugs.osdl.org
Reporter: plusfabi@gmail.com
Regression: No
Created attachment 293729
--> https://bugzilla.kernel.org/attachment.cgi?id=293729&action=edit
dmesg
Following: https://github.com/systemd/systemd/issues/17645
If I set kernel boot option "quiet", systemd fails to restore brightness level
with error
Failed to start Load/Save Screen Backlight Brightness of backlight:amdgpu_bl0.
At boot.
full journal output is:
journalctl -b -1 -u systemd-backlight@backlight:amdgpu_bl0.service
-- Logs begin at Thu 2020-09-17 08:15:00 CEST, end at Tue 2020-11-17 14:19:18
CET. --
Nov 17 14:15:15 frigg systemd[1]: Starting Load/Save Screen Backlight
Brightness of backlight:amdgpu_bl0...
Nov 17 14:15:15 frigg systemd-backlight[325]: amdgpu_bl0: Failed to write
system 'brightness' attribute: No such device or address
Nov 17 14:15:15 frigg systemd[1]:
systemd-backlight@backlight:amdgpu_bl0.service: Main process exited,
code=exited, status=1/FAILURE
Nov 17 14:15:15 frigg systemd[1]:
systemd-backlight@backlight:amdgpu_bl0.service: Failed with result 'exit-code'.
Nov 17 14:15:15 frigg systemd[1]: Failed to start Load/Save Screen Backlight
Brightness of backlight:amdgpu_bl0.
This is an AMD Renoir system, with AMD Ryzen 5 4500U APU,
This happens only, if I set 'quiet' as boot option. If I remove it, brightness
restore works fine.
If I boot with quiet set, after login I can do
systemctl start systemd-backlight@backlight:amdgpu_bl0.service
And it will successfully restore my brightness level.
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^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug 210263] brightness device returns ENXIO (?) on brightness restore at boot, with bootoption "quiet"
2020-11-18 22:33 [Bug 210263] New: brightness device returns ENXIO (?) on brightness restore at boot, with bootoption "quiet" bugzilla-daemon
@ 2021-02-02 11:32 ` bugzilla-daemon
2021-02-10 11:19 ` bugzilla-daemon
` (6 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: bugzilla-daemon @ 2021-02-02 11:32 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=210263
--- Comment #1 from ninelore@protonmail.com ---
Can confirm this with a Ryzen 7 4800H. Any news on this?
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^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug 210263] brightness device returns ENXIO (?) on brightness restore at boot, with bootoption "quiet"
2020-11-18 22:33 [Bug 210263] New: brightness device returns ENXIO (?) on brightness restore at boot, with bootoption "quiet" bugzilla-daemon
2021-02-02 11:32 ` [Bug 210263] " bugzilla-daemon
@ 2021-02-10 11:19 ` bugzilla-daemon
2021-02-10 16:10 ` bugzilla-daemon
` (5 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: bugzilla-daemon @ 2021-02-10 11:19 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=210263
--- Comment #2 from ninelore@protonmail.com ---
I just found out that this Issue does NOT occur when you additionally add the
fbcon=nodefer kernel parameter.
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^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug 210263] brightness device returns ENXIO (?) on brightness restore at boot, with bootoption "quiet"
2020-11-18 22:33 [Bug 210263] New: brightness device returns ENXIO (?) on brightness restore at boot, with bootoption "quiet" bugzilla-daemon
2021-02-02 11:32 ` [Bug 210263] " bugzilla-daemon
2021-02-10 11:19 ` bugzilla-daemon
@ 2021-02-10 16:10 ` bugzilla-daemon
2021-07-29 13:23 ` bugzilla-daemon
` (4 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: bugzilla-daemon @ 2021-02-10 16:10 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=210263
--- Comment #3 from Fabian (plusfabi@gmail.com) ---
(In reply to ninelore from comment #2)
> I just found out that this Issue does NOT occur when you additionally add
> the fbcon=nodefer kernel parameter.
This workaround works for me too.
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^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug 210263] brightness device returns ENXIO (?) on brightness restore at boot, with bootoption "quiet"
2020-11-18 22:33 [Bug 210263] New: brightness device returns ENXIO (?) on brightness restore at boot, with bootoption "quiet" bugzilla-daemon
` (2 preceding siblings ...)
2021-02-10 16:10 ` bugzilla-daemon
@ 2021-07-29 13:23 ` bugzilla-daemon
2021-12-02 8:35 ` bugzilla-daemon
` (3 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: bugzilla-daemon @ 2021-07-29 13:23 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=210263
Jonas Platte (jplatte+linux@posteo.de) changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jplatte+linux@posteo.de
--- Comment #4 from Jonas Platte (jplatte+linux@posteo.de) ---
Workaround works for me too, on a Lenovo Ideapad 530S-14ARR with an AMD Ryzen
2500U. I also set acpi_backlight=vendor to fix the same error message for
backlight:acpi_video1. (No idea why it tries to restore backlight brightness
twice)
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* [Bug 210263] brightness device returns ENXIO (?) on brightness restore at boot, with bootoption "quiet"
2020-11-18 22:33 [Bug 210263] New: brightness device returns ENXIO (?) on brightness restore at boot, with bootoption "quiet" bugzilla-daemon
` (3 preceding siblings ...)
2021-07-29 13:23 ` bugzilla-daemon
@ 2021-12-02 8:35 ` bugzilla-daemon
2022-01-05 21:25 ` bugzilla-daemon
` (2 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: bugzilla-daemon @ 2021-12-02 8:35 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=210263
--- Comment #5 from Fabian (fabiscafe@mailbox.org) ---
As of Kernel 5.15, I don't need fbcon=nodefer anymore. By default the backlight
works and is set on start. I still get from time to time an boot-error by
systemd, but that can be also worked around by loading amdgpu early.
Can someone confirm this?
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* [Bug 210263] brightness device returns ENXIO (?) on brightness restore at boot, with bootoption "quiet"
2020-11-18 22:33 [Bug 210263] New: brightness device returns ENXIO (?) on brightness restore at boot, with bootoption "quiet" bugzilla-daemon
` (4 preceding siblings ...)
2021-12-02 8:35 ` bugzilla-daemon
@ 2022-01-05 21:25 ` bugzilla-daemon
2022-01-08 13:05 ` bugzilla-daemon
2022-01-12 15:08 ` bugzilla-daemon
7 siblings, 0 replies; 9+ messages in thread
From: bugzilla-daemon @ 2022-01-05 21:25 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=210263
jaromir.obr@gmail.com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jaromir.obr@gmail.com
--- Comment #6 from jaromir.obr@gmail.com ---
@Fabian
I have the same experience. I was running kernel 5.13 on Ubuntu 21.10 and when
I upgraded to mainline kernel 5.15.13 (using
https://github.com/pimlie/ubuntu-mainline-kernel.sh), the service
"systemd-backlight@backlight:amdgpu_bl0.service" starts as expected and
backlight seems to be restored.
With kernel 5.13 it failed: "Failed to start Load/Save Screen Backlight
Brightness of backlight:amdgpu_bl0" and I was not able to start it manually.
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* [Bug 210263] brightness device returns ENXIO (?) on brightness restore at boot, with bootoption "quiet"
2020-11-18 22:33 [Bug 210263] New: brightness device returns ENXIO (?) on brightness restore at boot, with bootoption "quiet" bugzilla-daemon
` (5 preceding siblings ...)
2022-01-05 21:25 ` bugzilla-daemon
@ 2022-01-08 13:05 ` bugzilla-daemon
2022-01-12 15:08 ` bugzilla-daemon
7 siblings, 0 replies; 9+ messages in thread
From: bugzilla-daemon @ 2022-01-08 13:05 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=210263
--- Comment #7 from jaromir.obr@gmail.com ---
Related fix for resume from suspend in kernel 5.15 explained here:
https://www.phoronix.com/scan.php?page=news_item&px=AMD-S2idle-Fix-Linux-5.15
The say it could also fix an issue with brightness.
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* [Bug 210263] brightness device returns ENXIO (?) on brightness restore at boot, with bootoption "quiet"
2020-11-18 22:33 [Bug 210263] New: brightness device returns ENXIO (?) on brightness restore at boot, with bootoption "quiet" bugzilla-daemon
` (6 preceding siblings ...)
2022-01-08 13:05 ` bugzilla-daemon
@ 2022-01-12 15:08 ` bugzilla-daemon
7 siblings, 0 replies; 9+ messages in thread
From: bugzilla-daemon @ 2022-01-12 15:08 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=210263
--- Comment #8 from ninelore@protonmail.com ---
(In reply to Fabian from comment #5)
> As of Kernel 5.15, I don't need fbcon=nodefer anymore. By default the
> backlight works and is set on start. I still get from time to time an
> boot-error by systemd, but that can be also worked around by loading amdgpu
> early.
>
> Can someone confirm this?
(In reply to jaromir.obr from comment #6)
> @Fabian
> I have the same experience. I was running kernel 5.13 on Ubuntu 21.10 and
> when I upgraded to mainline kernel 5.15.13 (using
> https://github.com/pimlie/ubuntu-mainline-kernel.sh), the service
> "systemd-backlight@backlight:amdgpu_bl0.service" starts as expected and
> backlight seems to be restored.
>
> With kernel 5.13 it failed: "Failed to start Load/Save Screen Backlight
> Brightness of backlight:amdgpu_bl0" and I was not able to start it manually.
Can confirm this bug is fixed with 5.15
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