[Bug 100595] [vulkancts] incremental_present tests can hang indefinitely

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=100595

--- Comment #1 from Mark Janes <mark.a.janes at intel.com> ---
Jason suggested that Vulkan's lack of support for vblank_mode resulted in X
putting the display to sleep (and limiting fps to 1).  This would stall tests
for long periods of time.

After executing `xset dpms force on` for the X session, hangs seem to have
ceased.

However, incremental_present tests intermittently fail on KBL.  Jason suggested
modesetting vs sna as a possible difference for the default kbl config.

Xorg's log indicates modesetting/dri2 for skl and kbl platforms.  skl passes
incremental present reliably.

These  tests are disabled for kbl only.

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