[Bug 79261] [snb] [Samsung NP530U3C-A02CL] [drm:ilk_display_irq_handler] *ERROR* Pipe A FIFO underrun

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=79261

Rainmaker52 at gmail.com changed:

           What    |Removed                     |Added
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                 CC|                            |Rainmaker52 at gmail.com

--- Comment #33 from Rainmaker52 at gmail.com ---
This bug seems to be largely solved in 4.1.0-rc2.

I have 3 monitors configured. 1 is laptop internal, 1 is connected to a
DisplayPort via a docking station, and 1 is connected via a DisplayPort port in
my laptop.

Every few hours (seems somewhat random, I cannot find any common timeframe or
action), the monitor connected to the DisplayPort (I've not seen the one
connected through the docking station do this), turns off, and comes back a few
seconds later. Nothing crashes, no windows are moved to a different monitor,
and work can resume.

I see no extra information in the logs. I hope the above tale can tell someone
who actually knows the driver whether or not this narrows down the possible
cause.

dmesg displays:
[ 5238.907414] [drm:ivybridge_set_fifo_underrun_reporting [i915]] *ERROR*
uncleared fifo underrun on pipe A
[ 5238.907439] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU
pipe A FIFO underrun
[ 5238.907461] [drm:cpt_set_fifo_underrun_reporting [i915]] *ERROR* uncleared
pch fifo underrun on pch transcoder A
[ 5238.907475] [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH
transcoder A FIFO underrun

$ xrandr --query
Screen 0: minimum 8 x 8, current 5206 x 1304, maximum 32767 x 32767
LVDS1 connected primary 1366x768+0+536 (normal left inverted right x axis y
axis) 309mm x 173mm
   1366x768       60.1*+   40.0  
   1360x768       59.8     60.0  
   1024x768       60.0  
   800x600        60.3     56.2  
   640x480        59.9  
DP1 connected 1920x1080+1366+0 (normal left inverted right x axis y axis) 477mm
x 268mm
   1920x1080      60.0*+
   1600x900       60.0  
   1280x1024      75.0     60.0  
   1152x864       75.0  
   1024x768       75.1     60.0  
   800x600        75.0     60.3  
   640x480        75.0     60.0  
   720x400        70.1  
DP2 disconnected (normal left inverted right x axis y axis)
DP3 connected 1920x1080+3286+0 (normal left inverted right x axis y axis) 477mm
x 268mm
   1920x1080      60.0*+
   1600x900       60.0  
   1280x1024      75.0     60.0  
   1152x864       75.0  
   1024x768       75.1     60.0  
   800x600        75.0     60.3  
   640x480        75.0     60.0  
   720x400        70.1  
HDMI1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
HDMI3 disconnected (normal left inverted right x axis y axis)
VGA1 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)

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