On Tue, Sep 20, 2016 at 12:30 PM, Dusty Mabe <du...@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 > [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 > [drm:intel_pipe_update_end [i915]] *ERROR* Atomic update failure on pipe A > (start=488827 end=488828) time 107 us, min 1073, max 1079, scanline start > 1072, end 1080 > > I'm not saying these are what is causing the issue but are at least > something I noticed. > > I'll continue to monitor this problem. It only happens like once every > two weeks so it is hard to prepare for it by knowing the IP address so > that I can try to ssh in to see if the system is frozen or if it is > just the screen. > > Has anyone else seen some behavior like this? I am using i3wm and my > system is updated approximately once a week, so I should have close to > the latest software installed. > > Thanks, > Dusty > > _______________________________________________ > devel mailing list -- devel@lists.fedoraproject.org > To unsubscribe send an email to devel-le...@lists.fedoraproject.org > I ran in to a problem that involved an unresponsive screen a few months ago and also had a FIFO underrun. I think your problem is somewhere in the intel graphics stack. Here's the bug I had: https://bugzilla.redhat.com/show_bug.cgi?id=1339855 https://bugs.freedesktop.org/show_bug.cgi?id=96284 I was able to determine the system wasn't frozen because I made a unit file that ran a bash script that saved a file on shut down and then pressed my power button. Systemd ran the script and I was able to see the file had been updated. The fact that it was able to shutdown without me forcing it was also a good sign that this was the case. Some info about reporting these bugs is here: https://01.org/linuxgraphics/documentation/how-report-bugs If you want to try some drivers that are close to the developer version upstream you can try my copr repo: https://copr.fedorainfracloud.org/coprs/bollocks/intelblood/packages/ It hasn't been updated in a month. I'm going to get on that today. I try for once a week but since I no longer have any bugs I don't run it on my machine and so I forget easily. Note that running these is probably crazy experimental and the package maintainer(me) is far from an expert.
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