Re: [BUG/REGRESSION] Screen flickering

Jan Niehusmann
2015-05-13T11:10:11Z

On Wed, May 13, 2015 at 04:02:25PM +0530, Sudip Mukherjee wrote:
> > What I'm missing in the report, are some log entries I'm seeing on my
> > notebook:
> >
> > Apr 30 08:50:23 localhost kernel: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun
> > Apr 30 08:50:23 localhost kernel: [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH transcoder B FIFO underrun
> > Apr 30 08:50:29 localhost kernel: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
> > Apr 30 08:50:29 localhost kernel: [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun
> hi,
> I also have the similar entries in my dmesg, though my problem is a
> little different from yours and my bisect lead to another commit.
> And that also is still not fixed (last tested with 4.0).

(Please note that I didn't do a bisect - that was Thomas. I only noted
that I can confirm his observations and that his patch helps to prevent
or hide the issue.)

Perhaps these are two completely unrelated issues?

Jan