On 09/21/2016 08:41 AM, Dusty Mabe wrote:
>
>
> On 09/20/2016 07:22 PM, Andrew Lutomirski wrote:
>> On Sep 20, 2016 7:31 AM, "Dusty Mabe" <dusty(a)dustymabe.com
<mailto:dusty@dustymabe.com>> wrote:
>>>
>>>
>>> Several times over the past month my t460s has just blank screens
>>> when I come back to it after some time. I don't know if the thing
>>> froze up completely or if it is just the display not working. I lock
>>> my screens (laptop + 2 external monitors) and then leave for an hour
>>> or so. When I come back no attempt at input will get the lockscreen
>>> to appear. I have to power down and then back up.
>>>
>>> After boot I look at the journal and I always tend to see some of
>>> these:
>>>
>>> [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO
underrun
>>
>> Sadly, i915 has had issues on and off with Skylake.
>
> :(
>
>>
>>> [drm:intel_pipe_update_end [i915]] *ERROR* Atomic update failure on pipe C
(start=167156 end=167157) time 146 us, min 1073, max 1079, scanline start 1072, end 1082
>>
>> This smells like a bug that was fixed in the 4.8 series a bit late IIRC. Search
for i915 SAGV.
>
> Ok, I'll browse through the commit log.
>
I think this commit is probably the one that you were referring to:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?i...
This happened to me again today so I decided to grab the latest F25
kernel to see if that causes the problem to go away.
kernel-4.8.0-0.rc6.git0.1.fc25.x86_64