* [Bug 121481] New: No video output after loading nouveau module
@ 2016-07-05 16:32 bugzilla-daemon
2016-07-05 16:32 ` [Bug 121481] " bugzilla-daemon
` (9 more replies)
0 siblings, 10 replies; 11+ messages in thread
From: bugzilla-daemon @ 2016-07-05 16:32 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=121481
Bug ID: 121481
Summary: No video output after loading nouveau module
Product: Drivers
Version: 2.5
Kernel Version: 4.7-rc6
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: demfloro@demfloro.ru
Regression: No
Created attachment 222091
--> https://bugzilla.kernel.org/attachment.cgi?id=222091&action=edit
dmesg for just modprobe nouveau
OS: Arch Linux
Video adapter: GeForce GTX 780 Ti
Since 4.7 loading nouveau module results in black screen, but when I load
nouveau module with parameter debug=trace the issue does not appear, screen
successfully switches to correct resolution and Xorg can be successfully
started.
I did following:
- after OS booting I issued command "modprobe nouveau", in this case execution
of the command took about 44 seconds;
- when "modprobe nouveau" returned control to shell I blindly issued command
"startx" on terminal in VT;
- after that machine was rebooted with "reboot"
- after reboot I issued command "modprobe nouveau debug=trace", it took about
11 seconds to finish;
- after that I issued "startx" and Xorg started sucessfully.
If I compile nouveau module in kernel then I lose video output right after
kernel loads if I don't pass nouveau.debug=trace parameter.
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* [Bug 121481] No video output after loading nouveau module
2016-07-05 16:32 [Bug 121481] New: No video output after loading nouveau module bugzilla-daemon
@ 2016-07-05 16:32 ` bugzilla-daemon
2016-07-05 16:33 ` bugzilla-daemon
` (8 subsequent siblings)
9 siblings, 0 replies; 11+ messages in thread
From: bugzilla-daemon @ 2016-07-05 16:32 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=121481
Dmitrii Tcvetkov <demfloro@demfloro.ru> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |demfloro@demfloro.ru
--- Comment #1 from Dmitrii Tcvetkov <demfloro@demfloro.ru> ---
Created attachment 222101
--> https://bugzilla.kernel.org/attachment.cgi?id=222101&action=edit
Xorg.0.log for modprobe nouveau
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* [Bug 121481] No video output after loading nouveau module
2016-07-05 16:32 [Bug 121481] New: No video output after loading nouveau module bugzilla-daemon
2016-07-05 16:32 ` [Bug 121481] " bugzilla-daemon
@ 2016-07-05 16:33 ` bugzilla-daemon
2016-07-05 16:34 ` bugzilla-daemon
` (7 subsequent siblings)
9 siblings, 0 replies; 11+ messages in thread
From: bugzilla-daemon @ 2016-07-05 16:33 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=121481
--- Comment #2 from Dmitrii Tcvetkov <demfloro@demfloro.ru> ---
Created attachment 222111
--> https://bugzilla.kernel.org/attachment.cgi?id=222111&action=edit
dmesg for modprobe nouveau debug=trace
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^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug 121481] No video output after loading nouveau module
2016-07-05 16:32 [Bug 121481] New: No video output after loading nouveau module bugzilla-daemon
2016-07-05 16:32 ` [Bug 121481] " bugzilla-daemon
2016-07-05 16:33 ` bugzilla-daemon
@ 2016-07-05 16:34 ` bugzilla-daemon
2016-07-05 16:46 ` bugzilla-daemon
` (6 subsequent siblings)
9 siblings, 0 replies; 11+ messages in thread
From: bugzilla-daemon @ 2016-07-05 16:34 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=121481
--- Comment #3 from Dmitrii Tcvetkov <demfloro@demfloro.ru> ---
Created attachment 222121
--> https://bugzilla.kernel.org/attachment.cgi?id=222121&action=edit
Xorg.0.log for modprobe nouveau debug=trace
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* [Bug 121481] No video output after loading nouveau module
2016-07-05 16:32 [Bug 121481] New: No video output after loading nouveau module bugzilla-daemon
` (2 preceding siblings ...)
2016-07-05 16:34 ` bugzilla-daemon
@ 2016-07-05 16:46 ` bugzilla-daemon
2016-07-05 16:55 ` bugzilla-daemon
` (5 subsequent siblings)
9 siblings, 0 replies; 11+ messages in thread
From: bugzilla-daemon @ 2016-07-05 16:46 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=121481
--- Comment #4 from Dmitrii Tcvetkov <demfloro@demfloro.ru> ---
Created attachment 222131
--> https://bugzilla.kernel.org/attachment.cgi?id=222131&action=edit
lspci
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^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug 121481] No video output after loading nouveau module
2016-07-05 16:32 [Bug 121481] New: No video output after loading nouveau module bugzilla-daemon
` (3 preceding siblings ...)
2016-07-05 16:46 ` bugzilla-daemon
@ 2016-07-05 16:55 ` bugzilla-daemon
2016-07-05 17:35 ` bugzilla-daemon
` (4 subsequent siblings)
9 siblings, 0 replies; 11+ messages in thread
From: bugzilla-daemon @ 2016-07-05 16:55 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=121481
Ilia Mirkin <imirkin@alum.mit.edu> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |imirkin@alum.mit.edu
--- Comment #5 from Ilia Mirkin <imirkin@alum.mit.edu> ---
Did this ever work for you?
Looks like DP link training fails. If it worked before, I would suspect commit
a8953c52b95167b5d21a66f0859751570271d834 .
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^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug 121481] No video output after loading nouveau module
2016-07-05 16:32 [Bug 121481] New: No video output after loading nouveau module bugzilla-daemon
` (4 preceding siblings ...)
2016-07-05 16:55 ` bugzilla-daemon
@ 2016-07-05 17:35 ` bugzilla-daemon
2016-07-05 17:36 ` bugzilla-daemon
` (3 subsequent siblings)
9 siblings, 0 replies; 11+ messages in thread
From: bugzilla-daemon @ 2016-07-05 17:35 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=121481
Dmitrii Tcvetkov <demfloro@demfloro.ru> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |CODE_FIX
--- Comment #6 from Dmitrii Tcvetkov <demfloro@demfloro.ru> ---
It works good on kernel 4.6.3 and earlier, problem is since 4.7. I just tried
to find conditions of the bug.
I reverted patch
"0006-drm-nouveau-disp-sor-gf119-both-links-use-the-same-training register"
from commit a8953c52b95167b5d21a66f0859751570271d834 and nouveau loads about 1
second, screen does not become black. System behaves like on 4.6 kernel.
Unfortunately I can't fully understand impact of this reversion on different
video adapters. Can you send it to dri-devel mailing list?
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^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug 121481] No video output after loading nouveau module
2016-07-05 16:32 [Bug 121481] New: No video output after loading nouveau module bugzilla-daemon
` (5 preceding siblings ...)
2016-07-05 17:35 ` bugzilla-daemon
@ 2016-07-05 17:36 ` bugzilla-daemon
2016-07-05 21:29 ` bugzilla-daemon
` (2 subsequent siblings)
9 siblings, 0 replies; 11+ messages in thread
From: bugzilla-daemon @ 2016-07-05 17:36 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=121481
--- Comment #7 from Dmitrii Tcvetkov <demfloro@demfloro.ru> ---
Created attachment 222141
--> https://bugzilla.kernel.org/attachment.cgi?id=222141&action=edit
dmesg with reverted 6th patch from a8953c52b95167b5d21a66f0859751570271d834
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* [Bug 121481] No video output after loading nouveau module
2016-07-05 16:32 [Bug 121481] New: No video output after loading nouveau module bugzilla-daemon
` (6 preceding siblings ...)
2016-07-05 17:36 ` bugzilla-daemon
@ 2016-07-05 21:29 ` bugzilla-daemon
2016-07-05 21:57 ` bugzilla-daemon
2016-07-08 18:01 ` bugzilla-daemon
9 siblings, 0 replies; 11+ messages in thread
From: bugzilla-daemon @ 2016-07-05 21:29 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=121481
--- Comment #8 from Ilia Mirkin <imirkin@alum.mit.edu> ---
Ben has a better fix here:
https://github.com/skeggsb/linux/commit/217215041b9285af2193a755b56a8f3ed408bfe2
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* [Bug 121481] No video output after loading nouveau module
2016-07-05 16:32 [Bug 121481] New: No video output after loading nouveau module bugzilla-daemon
` (7 preceding siblings ...)
2016-07-05 21:29 ` bugzilla-daemon
@ 2016-07-05 21:57 ` bugzilla-daemon
2016-07-08 18:01 ` bugzilla-daemon
9 siblings, 0 replies; 11+ messages in thread
From: bugzilla-daemon @ 2016-07-05 21:57 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=121481
Dmitrii Tcvetkov <demfloro@demfloro.ru> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|CODE_FIX |PATCH_ALREADY_AVAILABLE
--- Comment #9 from Dmitrii Tcvetkov <demfloro@demfloro.ru> ---
Thank you, that fix helped.
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* [Bug 121481] No video output after loading nouveau module
2016-07-05 16:32 [Bug 121481] New: No video output after loading nouveau module bugzilla-daemon
` (8 preceding siblings ...)
2016-07-05 21:57 ` bugzilla-daemon
@ 2016-07-08 18:01 ` bugzilla-daemon
9 siblings, 0 replies; 11+ messages in thread
From: bugzilla-daemon @ 2016-07-08 18:01 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=121481
Dmitrii Tcvetkov <demfloro@demfloro.ru> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |CLOSED
--- Comment #10 from Dmitrii Tcvetkov <demfloro@demfloro.ru> ---
commit 1d110cf5d307bd52e826a2ceaa7daab83be61b7a
Merge: cc23c61 39c8859
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date: Fri Jul 8 08:55:27 2016 -0700
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