Ubuntu
xserver-xorg-video-intel package

  1. Bug #1097315
  2. Comment #31

Comment 31 for bug 1097315

Revision history for this message
Scott Moser (smoser) wrote : Re: Xorg freeze

Immediately after it hangs:
 * $ sudo cat /sys/kernel/debug/dri/0/i915_error_state
    no error state collected
 * 'DISPLAY=:0.0 xrandr' seems to work.
   'DISPLAY=:0.0 xrandr --output LVDS1 --auto --output HDMI2 --off' turned off the monitor, but then never returned.
 * 'DISPLAY=:0.0 gnome-terminal' just hangs
 * when screen dims due to idle (which i've set to 2 minutes), keyboard input will brighten the screen again.

then I tried 'sudo stop lightdm', and slept 120 seconds.
Still, no error state in 'i915_error_state'

Then, i tried 'chvt 1', and gave it 120 seconds to return.
at this point 'dmesg' shows the trace, but /i915_error_state still says "no error state collected"