[Intel-gfx] PCH fifo underrun in 3.18

[jon]

Under what product should I submit the bug? dmr.debug=14 doesn't show much.

[jon at localhost]~% dmesg | grep drm
[    1.936241] [drm] Initialized drm 1.1.0 20060810
[    2.193043] [drm] Memory usable by graphics device = 2048M
[    2.193046] [drm] Replacing VGA console driver
[    2.199998] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[    2.200000] [drm] Driver supports precise vblank timestamp query.
[    2.287949] [drm] GMBUS [i915 gmbus dpb] timed out, falling back to 
bit banging on pin 5
[    2.297614] fbcon: inteldrmfb (fb0) is primary device
[    2.576664] [drm:cpt_set_fifo_underrun_reporting] *ERROR* uncleared 
pch fifo underrun on pch transcoder A
[    2.576666] [drm:cpt_serr_int_handler] *ERROR* PCH transcoder A FIFO 
underrun


Jon

On 02/08/2015 11:18 PM, Jani Nikula wrote:
> On Fri, 30 Jan 2015, jon <jmoroney at hawaii.edu> wrote:
>> Just updated my thinkpad (x230, ivy bridge platform) to 3.18 and boot
>> fails with the error 'PCH fifo underrun'. This is under fedora 21 with
>> the fedora kernel version 3.18.3-201
> Please file a bug on [1], attach a dmesg from boot to the problem with
> drm.debug=14 module parameter set. Reference this thread.
>
> Thanks,
> Jani.
>
> [1] https://bugs.freedesktop.org/enter_bug.cgi?product=DRI&component=DRM/Intel
>

-- 
Jon