[Bug 102144] video tearing since update to xf86-video-ati 1:7.8.99.r16.gea30d856-1

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=102144

--- Comment #7 from Barto  ---
vsync setting is set to "never" in plasma 5 compositor,

with 1:7.8 version I don't see tearing in videos even if the vsync is set to
"never",

but with 1:7.9 version I see tearing when vsync is set to never,

if I chose ""Reuse screen contents" then I get a warning in the GUI compositor
about the risk on instability of mesa driver, with this setting I notice that
the background of my desktop "blinks" when VLC plays a video, the display is
corrupted,

with the setting "automatic" it's better, I see no tearing ( for the moment )
with 1:7.9,

does it mean that the vsync is mandatory with 1:7.9 version ?

it doesn't seem normal to have to activate the vsync setting in compositor,
with the previous version of xf86-video-ati I never seen tearing in videos when
the vsync setting was disabled in the compositor, 

for me tearing should be seen only on 3D video games when the framerate doesn't
match with the framerate of the monitor

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[Bug 102144] video tearing since update to xf86-video-ati 1:7.8.99.r16.gea30d856-1

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=102144

--- Comment #4 from Barto  ---
Created attachment 133509
  --> https://bugs.freedesktop.org/attachment.cgi?id=133509=edit
xorg log file when xf86-video-ati 1.7.9 is used ( bad case, tearing )

and here is the xorg log file when the 1.7.9.0 version of xf86-video-ati is
used ( bad case, a lot of tearing in videos, and sometimes corrupt menus
display )

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[Bug 102144] video tearing since update to xf86-video-ati 1:7.8.99.r16.gea30d856-1

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=102144

--- Comment #3 from Barto  ---
Created attachment 133508
  --> https://bugs.freedesktop.org/attachment.cgi?id=133508=edit
xorg log file when xf86-video-ati 1.7.8 is used ( good case )

here is the xorg log file when the xf86-video-ati 1.7.8 is used ( good case, no
bug, no tearing )

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[Bug 101998] X server 1.19.3 failure with amdgpu (radeon M295X) on Ubuntu HWE16.04 kernel 4.10.0-28

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=101998

Meik Neubauer <t...@meikneubauer.de> changed:

   What|Removed |Added

 Attachment #133485|20170814 error reproduce|20170814 error reproduce
description||Dependencies 3/3

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[Bug 101998] X server 1.19.3 failure with amdgpu (radeon M295X) on Ubuntu HWE16.04 kernel 4.10.0-28

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=101998

Meik Neubauer <t...@meikneubauer.de> changed:

   What|Removed |Added

 Attachment #133487|20170814 error reproduce|20170814 error reproduce
description||Proccpuinfo

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[Bug 101998] X server 1.19.3 failure with amdgpu (radeon M295X) on Ubuntu HWE16.04 kernel 4.10.0-28

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=101998

--- Comment #25 from Meik Neubauer <t...@meikneubauer.de> ---
Created attachment 133491
  --> https://bugs.freedesktop.org/attachment.cgi?id=133491=edit
20170814 error reproduce Stacktrace

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[Bug 101998] X server 1.19.3 failure with amdgpu (radeon M295X) on Ubuntu HWE16.04 kernel 4.10.0-28

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=101998

--- Comment #24 from Meik Neubauer <t...@meikneubauer.de> ---
Created attachment 133490
  --> https://bugs.freedesktop.org/attachment.cgi?id=133490=edit
20170814 error reproduce Registers

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[Bug 101998] X server 1.19.3 failure with amdgpu (radeon M295X) on Ubuntu HWE16.04 kernel 4.10.0-28

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=101998

--- Comment #22 from Meik Neubauer <t...@meikneubauer.de> ---
Created attachment 133488
  --> https://bugs.freedesktop.org/attachment.cgi?id=133488=edit
20170814 error reproduce Procmaps

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[Bug 101998] X server 1.19.3 failure with amdgpu (radeon M295X) on Ubuntu HWE16.04 kernel 4.10.0-28

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=101998

--- Comment #21 from Meik Neubauer <t...@meikneubauer.de> ---
Created attachment 133487
  --> https://bugs.freedesktop.org/attachment.cgi?id=133487=edit
20170814 error reproduce

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[Bug 101998] X server 1.19.3 failure with amdgpu (radeon M295X) on Ubuntu HWE16.04 kernel 4.10.0-28

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=101998

--- Comment #20 from Meik Neubauer <t...@meikneubauer.de> ---
Created attachment 133486
  --> https://bugs.freedesktop.org/attachment.cgi?id=133486=edit
20170814 error reproduce Disassembly + Journalerrors

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[Bug 101998] X server 1.19.3 failure with amdgpu (radeon M295X) on Ubuntu HWE16.04 kernel 4.10.0-28

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=101998

--- Comment #18 from Meik Neubauer <t...@meikneubauer.de> ---
Created attachment 133484
  --> https://bugs.freedesktop.org/attachment.cgi?id=133484=edit
20170814 error reproduce

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[Bug 101998] X server 1.19.3 failure with amdgpu (radeon M295X) on Ubuntu HWE16.04 kernel 4.10.0-28

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=101998

--- Comment #19 from Meik Neubauer <t...@meikneubauer.de> ---
Created attachment 133485
  --> https://bugs.freedesktop.org/attachment.cgi?id=133485=edit
20170814 error reproduce

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[Bug 101998] X server 1.19.3 failure with amdgpu (radeon M295X) on Ubuntu HWE16.04 kernel 4.10.0-28

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=101998

--- Comment #16 from Meik Neubauer  ---
Tried to reproduce today with kernel 4.10.0-32.

Booted, then 'service lightdm stop'. This time Xorg was unloaded from the
system.

Started 'gdb --args /usr/lib/xorg/Xorg -core :0 -seat seat0 -auth
/var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch'
[Rem.: this is the 'normal' cmdline I see in a running system]
then 'service lightdm start', but seemingly it did not use the Xorg started
with gdb, but created a new process. Hit the error again.

Rebooted with external monitor detached.
Ubuntu error reporting came up with the Xorg failure.
I will attach screenshots of this.

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[Bug 102144] video tearing since update to xf86-video-ati 1:7.8.99.r16.gea30d856-1

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=102144

--- Comment #2 from Michel Dänzer  ---
Please attach the Xorg log file corresponding to the good and bad case.

Most likely it's related to the default for Option "AccelMethod" switching from
EXA to glamor for your GPU, but in that case you should have tearing with EXA
as well, just less noticeable one (horizontal vs diagonal). To really eliminate
tearing, you need to use a compositing manager that can reliably eliminate it.

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