[Mesa-dev] [Bug 98833] [REGRESSION, bisected] Wayland revert commit breaks fullscreen frame updates

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98833

--- Comment #3 from Eero Tamminen <eero.t.tamminen at intel.com> ---
Before checking other things, I'm going to try whether this happens also with
latest kernel and on something else than SKL.


(In reply to Daniel Stone from comment #1)
> Which compositor is this? I wouldn't be at all surprised if this was Weston
> being broken, but I'm happy to give it a closer look.

This was with Weston, both the 1.9 version in Ubuntu 16.04 and version I built
from git.

Could you propose what else I should test besides Weston?  It should be
something that can be tested with reasonable effort on Ubuntu (16.04).

(Gnome on Wayland option in lightdm just crashes, I'll check whether things
work better with Gdm.)


> If you can reproduce this with something (anything) publicly available as well, that would obviously also be a massive help ...

I guess this isn't something that would show up with just normal desktop 2D
usage of 3D driver, as otherwise somebody would already have done a bug about
it.

Are there other 3D tests than Glmark2 which work on Wayland?   Preferably
something made for GLES 3.x, GL 3.x or GL 4.x, not old GL / GLES 2.0 stuff like
Glmark2, and preferably something already available on Ubuntu so that they can
be checked quickly...


(In reply to Pekka Paalanen from comment #2)
> (In reply to Eero Tamminen from comment #0)
> > Test suite has options for using single, double or triple buffering and
> > toggling Vsync, but these didn't have any effect.
[...]
> I could understand better if you explained what you use in EGL API terms
> instead, since AFAIK there is no way to explicitly choose a "buffering
> scheme", EGL made sure to abstract that away from the app.

They were just options in the test-suite, I'll check whether they actually
should do something on EGL/Wayland (test-suite supports also other APIs & 
OSes, so it's possible that all options aren't supported on all platforms).


Apitrace replay didn't work on a trace, do I need to do something specific to
get Apitrace to replay traces on Wayland?

(Apitrace changes some things, so I don't trust trace dump to be reliable in
telling how program works until I've seen issue also on trace replay.)

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