[drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
xorg (Ubuntu) |
Expired
|
Low
|
Unassigned |
Bug Description
On Kubuntu 15.10, KDE Framework 5.18.0, Qt 5.5.1, kernel 4.4.1-040401-
Several times a day the display seems to crash in various ways, some recoverable (e.g. by restarting plasmashell or sddm) but sometimes a monitor stays blank, corrupt or unresponsive and only a full reboot helps. I also see a plasma crash dialog every time I return to my desktop after the screens went into power-savings mode when I was away (I don't know if this is related or a plasma bug). It also happens sometimes while dragging a windows (desktop effects are on), while watching a video (I now get occasionally a few seconds with black output in the middle of the video too). It's hard to pinpoint which components are unstable, likely more than one, but this is a starting point since I get the following message in dmesg which I assume is at a lower level than the desktop environment (correct me if I'm wrong):
[Thu Feb 4 10:44:20 2016] [drm:intel_
[Thu Feb 4 10:44:20 2016] [drm:intel_
Note to self (apparently): A workaround that brings back the windows without losing any data from open apps, at least in some cases, is running "DISPLAY=:0 kwin_x11 --replace" from the terminal (ctrl-alt-f1).