Re: Bug#929834: Buster/XFCE unlock screen is blank
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On Mon, 2019-06-03 at 12:59 -0700, Russ Allbery wrote:
> Ah, good call. I was also seeing other problems with the Intel driver in
> combination with light-locker where the monitor resolution would be set to
> some incorrect value after restore from lock. This would come with kernel
> errors like:
>
> [drm:intel_set_cpu_fifo_underrun_reporting [i915]] *ERROR* uncleared fifo underrun on pipe B
> [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun
>
> and then lots and lots of:
>
> [drm:intel_dp_start_link_train [i915]] *ERROR* Timed out waiting for DP idle patterns
My gut feeling is that light-locker just uses codepaths not really used
otherwise, like vt-switch at the same time as suspend/resume or screen off/on.
Unfortunately debugging i915 is completely out of my league (and I already
tried multiple time on other issues).
Regards,
- --
Yves-Alexis
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