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