[Bug 99507] Corrupted frame contents with Vulkan version of DOTA2, Talos Principle and Sascha Willems' demos when they're run Vsynched in fullscreen

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99507

Eero Tamminen <eero.t.tamminen at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://bugs.freedesktop.or
                   |                            |g/show_bug.cgi?id=104338
             Status|NEEDINFO                    |NEW

--- Comment #14 from Eero Tamminen <eero.t.tamminen at intel.com> ---
Tested Mesa git with latest drm-tip kernel on BDW GT2 & SKL GT4e, and Mesa git
with Ubuntu 16.04 kernel on KBL GT3e.

I didn't see the issue with BDW GT2, but I saw it still on SKL GT4e & KBL GT3e.
 It's fairly visible in Vulkan Multithreading demo.

Raytracing demo, where this was most visible, wasn't testable because of bug
104338. 

Subpasses demo has also some flickering which could be due to this same issue.


Issue is much harder to see in DOTA2 now.  To see it now, in addition to:
* Setting gfx options to highest (to slow things down)
* Setting resolution to monitor native resolution, fullscreen and enable Vsync
(= page flipping requirements)

You need to scroll through the game area (e.g. all edges) while looking at the
solid colored text message bars to see the issue.  It still happens only with
Vsync enabled (=flipping), and is now a rare glitch.

I wasn't able to reproduce the issue anymore with Talos (or Sam3:BFE) Vulkan
rendering.

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