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Software - Support => Other => Topic started by: avj on July 02, 2015, 02:52:35 PM

Title: drm:intel_cpu_fifo_underrun_irq_handler [i915] *ERROR* CPU pipe A FIFO underrun
Post by: avj on July 02, 2015, 02:52:35 PM

This error started showing up at boot time after updating to the 4.1.0 kernel but It would go by so fast I could never make out what it was. After much searching I was able to find it in the syslog, I have updated to the new 4.1.1 kernel but it still shows up at boot. I have not noticed any difference in my system performance, but I thought it may be affecting something I don't normally use, so I decided to report the problem to the team.  :)

Title: Re: drm:intel_cpu_fifo_underrun_irq_handler [i915] *ERROR* CPU pipe A FIFO underrun
Post by: Jerry on July 02, 2015, 04:32:19 PM

After a bit of research, looks like a bug that hasn't been squashed yet.

Title: Re: drm:intel_cpu_fifo_underrun_irq_handler [i915] *ERROR* CPU pipe A FIFO underrun
Post by: avj on July 02, 2015, 06:22:53 PM

I read on one site that it was a kernel bug that had been fixed but has resurfaced in the newer kernels. I am sure one of the next few kernels will take care of it, from what I found it is on a lot of systems.

Title: Re: drm:intel_cpu_fifo_underrun_irq_handler [i915] *ERROR* CPU pipe A FIFO underrun
Post by: Jerry on July 03, 2015, 02:44:25 AM

Is there something in the newer kernels you require?

Title: Re: drm:intel_cpu_fifo_underrun_irq_handler [i915] *ERROR* CPU pipe A FIFO underrun
Post by: avj on July 03, 2015, 12:42:10 PM

Probably not, I just thought I would test them on this old netbook. 

Title: Re: drm:intel_cpu_fifo_underrun_irq_handler [i915] *ERROR* CPU pipe A FIFO underrun
Post by: avj on September 06, 2015, 10:39:04 AM

Rolling back to the originally installed kernel fixed this issue.