[Bug 107111] "Avoid waitboosting" (e9af4ea2b9e7) now prevents GPU boosting

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107111

--- Comment #4 from freedesktop at nmacleod.com ---
Apologies for the delay in responding, I've been collecting information.

I produced 4 test builds for users that are experiencing the visual stutter.
These builds are based on 4.17.4 where e9af4ea2b9e7 is not reverted:

#0703b, includes patch "reverting the intel_display chunk so that it always
boost after the vblank miss."[1]
#0703c, includes patch "might be an interesting compromise"[2]
#0703d, includes patch "nudge"[3]
#0703e, includes patches "nudge"[3] + "nudge2"[4]

Results (from 2 users)[5]:

#0703b: visual stutter still present
#0703c: no visual stutter, but audio issues (both users) - delayed and/or
stuttering audio
#0703d: no visual stutter and no audio issues
#0703e: no visual stutter and no audio issues

Regarding the audio issues, one user hasn't been able to reproduce[6] and the
other won't be able to test for a while[7], so this could be a red herring.

Hopefully this information is useful when deciding in which direction to go!


1. http://ix.io/1fYp
2. http://ix.io/1fYI
3. https://bugs.freedesktop.org/attachment.cgi?id=140462
4. http://ix.io/1fYX (4.17.4 compatible version of id=140463)
5. https://forum.kodi.tv/showthread.php?tid=298462&pid=2749048#pid2749048
6. https://forum.kodi.tv/showthread.php?tid=298462&pid=2749440#pid2749440
7. https://forum.kodi.tv/showthread.php?tid=298462&pid=2749557#pid2749557

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