Intel GPU error, PCH transcoder A FIFO underrun

[Evandro Giovanini]

On Sat, Aug 29, 2015 at 3:04 PM, Alex G.S. <alxgrtnstrngl at gmail.com> wrote:

> List,
>
> Every time I browse my 'journactl -b' logs I always see the following
> error:
>
> [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared pch
> fifo underrun on pch transcoder A
> [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH transcoder A
> FIFO underrun
>
> It also happens around times when I'm doing something graphically
> intensive and often precedes lockups.  But these lockups are rare and do
> not happen often.  The error message itself appears on nearly all of the
> Intel HD graphics chips I've used which are both the Intel HD 4000 and
> Intel HD 4600.
>
> I'm just curious as to any workarounds that could solve this in the
> short-term.  Of all the bug reports I've read they always end with no
> resolution or "version 4.0 of the Kernel will solve this", but I'm on
> Kernel 4.1+ and it's still not solved yet.
>
> Thank you for any information you can provide...
>
>

Downgrade from 4.1 to 4.0 to fix it.


Evandro
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