[Bug 103791] Tearing after screen wakeup/on

[Bug 103791] Tearing after screen wakeup/on

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https://bugs.freedesktop.org/show_bug.cgi?id=103791

            Bug ID: 103791
           Summary: Tearing after screen wakeup/on
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: denisgolovan@yandex.ru

Hi

Sometimes after screen wakeup/turning on I start to experience tearing.
Tear free mode works fine before sleep/turning display off.

My hardware is XFX Radeon RX580.
Software:
kernel-4.13.13+ck1,
xorg-1.19.5,
xf86-video-amdgpu (git 3a4f7422913093ed9e26b73ecd7f9e773478cb1e), 
libdrm-2.4.88

See dmesg, Xorg.0.log, xorg.conf attached.

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[Bug 103791] Tearing after screen wakeup/on

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https://bugs.freedesktop.org/show_bug.cgi?id=103791

--- Comment #1 from denisgolovan@yandex.ru ---
Created attachment 135552
  --> https://bugs.freedesktop.org/attachment.cgi?id=135552&action=edit
xorg.conf

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[Bug 103791] Tearing after screen wakeup/on

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https://bugs.freedesktop.org/show_bug.cgi?id=103791

--- Comment #2 from denisgolovan@yandex.ru ---
Created attachment 135553
  --> https://bugs.freedesktop.org/attachment.cgi?id=135553&action=edit
dmesg

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[Bug 103791] Tearing after screen wakeup/on

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https://bugs.freedesktop.org/show_bug.cgi?id=103791

--- Comment #3 from denisgolovan@yandex.ru ---
Created attachment 135554
  --> https://bugs.freedesktop.org/attachment.cgi?id=135554&action=edit
Xorg.0.log

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[Bug 103791] Tearing after screen wakeup/on

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https://bugs.freedesktop.org/show_bug.cgi?id=103791

Michel Dänzer <michel@daenzer.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #135554|text/x-log                  |text/plain
          mime type|                            |

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[Bug 103791] Tearing after screen wakeup/on

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https://bugs.freedesktop.org/show_bug.cgi?id=103791

--- Comment #4 from Michel Dänzer <michel@daenzer.net> ---
We need to find out why the kernel starts returning -EINVAL from the page flip
and wait for vblank ioctls.

Can you try writing 255 to /sys/module/drm/parameters/debug before reproducing
the problem, and attach the resulting dmesg output? (Note that writing non-0 to
/sys/module/drm/parameters/debug will cause a lot of debugging output to be
generated, so you'll want to write 0 to it again soon afterwards)

In case that doesn't reveal why -EINVAL is being returned, are you able to
recompile the drm.ko / amdgpu.ko kernel modules with a patch applied?

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[Bug 103791] Tearing after screen wakeup/on

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=103791

--- Comment #5 from denisgolovan@yandex.ru ---
(In reply to Michel Dänzer from comment #4)
> We need to find out why the kernel starts returning -EINVAL from the page
> flip and wait for vblank ioctls.
> 
> Can you try writing 255 to /sys/module/drm/parameters/debug before
> reproducing the problem, and attach the resulting dmesg output? (Note that
> writing non-0 to /sys/module/drm/parameters/debug will cause a lot of
> debugging output to be generated, so you'll want to write 0 to it again soon
> afterwards)

Got it. I'll attach dmesg as soon as I reproduce the issue.

> In case that doesn't reveal why -EINVAL is being returned, are you able to
> recompile the drm.ko / amdgpu.ko kernel modules with a patch applied?

Sure. Gentoo is there :)

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[Bug 103791] Tearing after screen wakeup/on

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=103791

--- Comment #6 from denisgolovan@yandex.ru ---
Created attachment 135701
  --> https://bugs.freedesktop.org/attachment.cgi?id=135701&action=edit
dmesg + debug

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[Bug 103791] Tearing after screen wakeup/on

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https://bugs.freedesktop.org/show_bug.cgi?id=103791

--- Comment #7 from denisgolovan@yandex.ru ---
See attached dmesg with debug. 
Tearing appeared after turning display on.

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[Bug 103791] Tearing after screen wakeup/on

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https://bugs.freedesktop.org/show_bug.cgi?id=103791

--- Comment #8 from denisgolovan@yandex.ru ---
Any news on that?
Should I report some more information/logs/etc?

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[Bug 103791] Tearing after screen wakeup/on

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https://bugs.freedesktop.org/show_bug.cgi?id=103791

--- Comment #9 from Michel Dänzer <michel@daenzer.net> ---
Created attachment 135808
  --> https://bugs.freedesktop.org/attachment.cgi?id=135808&action=edit
Add debugging output why the ioctls return -EINVAL

Sorry, been busy with other fires.

Please recompile the drm.ko module with this patch applied, reproduce the
result with the resulting binary and attach the dmesg output.

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[Bug 103791] Tearing after screen wakeup/on

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https://bugs.freedesktop.org/show_bug.cgi?id=103791

--- Comment #10 from Michel Dänzer <michel@daenzer.net> ---
BTW, the patch is completely untested; if it fails to compile, hopefully it
won't be hard to fix it up.

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[Bug 103791] Tearing after screen wakeup/on

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https://bugs.freedesktop.org/show_bug.cgi?id=103791

--- Comment #11 from denisgolovan@yandex.ru ---
Yes, I fixed some small issues with the patch.
Now I have following appear in dmesg:
[ 2108.319205] [drm] drm_crtc_vblank_get returned -EINVAL
[ 2108.319235] [drm] crtc 0 failed to acquire vblank counter, -22

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[Bug 103791] Tearing after screen wakeup/on

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https://bugs.freedesktop.org/show_bug.cgi?id=103791

--- Comment #12 from denisgolovan@yandex.ru ---
Created attachment 135917
  --> https://bugs.freedesktop.org/attachment.cgi?id=135917&action=edit
dmesg with debug

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[Bug 103791] Tearing after screen wakeup/on

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https://bugs.freedesktop.org/show_bug.cgi?id=103791

--- Comment #13 from Michel Dänzer <michel@daenzer.net> ---
Created attachment 135923
  --> https://bugs.freedesktop.org/attachment.cgi?id=135923&action=edit
drm_vblank_get debugging output

Please do the same with this patch, to see why drm_vblank_get returns -EINVAL.

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[Bug 103791] Tearing after screen wakeup/on

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https://bugs.freedesktop.org/show_bug.cgi?id=103791

--- Comment #14 from denisgolovan@yandex.ru ---
Created attachment 135938
  --> https://bugs.freedesktop.org/attachment.cgi?id=135938&action=edit
dmesg with vblank debug

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[Bug 103791] Tearing after screen wakeup/on

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https://bugs.freedesktop.org/show_bug.cgi?id=103791

--- Comment #15 from Michel Dänzer <michel@daenzer.net> ---
Created attachment 135969
  --> https://bugs.freedesktop.org/attachment.cgi?id=135969&action=edit
Debugging output related to enabling/disabling the vblank interrupt

Another iteration, to find out why the vblank interrupt doesn't get enabled.

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[Bug 103791] Tearing after screen wakeup/on

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[-- Attachment #1.1: Type: text/plain, Size: 311 bytes --]

https://bugs.freedesktop.org/show_bug.cgi?id=103791

--- Comment #16 from denisgolovan@yandex.ru ---
Created attachment 135989
  --> https://bugs.freedesktop.org/attachment.cgi?id=135989&action=edit
dmesg with vblank interrupt

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[Bug 103791] Tearing after screen wakeup/on

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https://bugs.freedesktop.org/show_bug.cgi?id=103791

--- Comment #17 from Michel Dänzer <michel@daenzer.net> ---
Thanks. I think I see what's happening, but I need some time to think about how
to address it.

Meanwhile, you should be able to re-enable TearFree by forcing a modeset, e.g.
by re-enabling the TearFree property:

xrandr --output DisplayPort-0 --set TearFree on

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[Bug 103791] Tearing after screen wakeup/on

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https://bugs.freedesktop.org/show_bug.cgi?id=103791

--- Comment #18 from Anthony Parsons <flussence+bz.fdo@gmail.com> ---
Hi, I'm seeing the same problem on an RX550 (polaris12). Running xrandr doesn't
seem to work as a workaround but flipping VTs does. Would having the debug
output for this one be useful, or was the other log enough?

kernel 4.14.5-zen+
xorg 1.19.5
xf86-video-amdgpu 1.4.0
libdrm 2.4.88

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[Bug 103791] Tearing after screen wakeup/on

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https://bugs.freedesktop.org/show_bug.cgi?id=103791

--- Comment #19 from denisgolovan@yandex.ru ---
Still better to have a proper fix first as New Year present to us (poor users)
;)

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[Bug 103791] Tearing after screen wakeup/on

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https://bugs.freedesktop.org/show_bug.cgi?id=103791

--- Comment #20 from denisgolovan@yandex.ru ---
Doing 
$ xrandr --output DisplayPort-0 --set TearFree on

... does not help. Tearing is still present.

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[Bug 103791] Tearing after screen wakeup/on

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https://bugs.freedesktop.org/show_bug.cgi?id=103791

--- Comment #21 from Michel Dänzer <michel@daenzer.net> ---
(In reply to Anthony Parsons from comment #18)
> Running xrandr doesn't seem to work as a workaround but flipping VTs does.

Have you tried turning it off and on again? (Who gets the reference? :)

xrandr --output DisplayPort-0 --set TearFree off
xrandr --output DisplayPort-0 --set TearFree on

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[Bug 103791] Tearing after screen wakeup/on

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https://bugs.freedesktop.org/show_bug.cgi?id=103791

Michel Dänzer <michel@daenzer.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|dri-devel@lists.freedesktop |xorg-driver-ati@lists.x.org
                   |.org                        |
         QA Contact|                            |xorg-team@lists.x.org
          Component|DRM/AMDgpu                  |Driver/AMDgpu
            Version|XOrg git                    |git
            Product|DRI                         |xorg

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