[Bug 95367] Screen suddenly goes black, [drm:valleyview_pipestat_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=95367

shdownnine at gmail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|NEW                         |RESOLVED

--- Comment #5 from shdownnine at gmail.com ---
(In reply to Ville Syrjala from comment #3)
> Created attachment 124090 [details] [review]
> [PATCH for v4.5] drm/i915: Fix watermarks for VLV/CHV
> 
> Backport of VLV/CHV watermark fix for 4.5. Please test.

Yep, it fixes the issue — switching workspaces in loop does not reproduce it
anymore. As for the patch for 4.6, I built a kernel with it applied and so far
it’s OK, but since I don’t know a reliable way to reproduce it, I can’t say for
sure. I’ll reopen if I notice it again.

Thanks!

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