[Bug 96419] [SKL/APL] vblank not available on crtc 0, ret=-22 (makes X freeze)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=96419

Direx <direx at betriebsdirektor.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |NEW
           Assignee|imre.deak at intel.com         |direx at betriebsdirektor.de

--- Comment #4 from Direx <direx at betriebsdirektor.de> ---
Created attachment 124574
  --> https://bugs.freedesktop.org/attachment.cgi?id=124574&action=edit
dmesg with drm.debug=14

I have attached a dmesg, but unfortunately I was not able to reproduce the
issue, although I am still using the same kernel. The first time the message
appeared was when I tried out the KDE desktop (maybe OpenGL 3.0 desktop
effects?).

I also ran the IGT tests, but this particular error did not appear (many others
did, though).

Notes:
- I got two other traces instead this time (should I open a new bug for this?)
- I am getting the usual "FIFO underrun" errors, which cause flickering. You
should already be aware of those errors (Bug 94605, Bug 94597, ...)

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