Ubuntu
linux package

  1. Bug #1138700
  2. Comment #2

Comment 2 for bug 1138700

Revision history for this message
In , Evawang (evawang) wrote :

Created attachment 72120
dmesg.log

GDM can't show and screen freeze after screen saver and turn off backlight command("gnome-screensaver-command -l;sleep 3;xset dpms force off")
But, if you press Ctrl+Alt+F3(tty3) then press Ctrl+Alt+F2(tty0), GDM will show.

Dmesg:
[11577.928164] [drm:intel_dp_set_link_train] *ERROR* Timed out waiting for DP idle patterns
[11577.928167] [drm:i915_write32] *ERROR* Unknown unclaimed register before writing to 64040

Expected output: it enter to screensaver and turn off backlight, then press any key to resume system, it should shows GDM.

This only happens on Haswell chipset, but it is OK on Ivybridge.
Kernel 3.7.0 added intel 3.7.0 branch kernel patch
Xorg1.12.0
Model: Lenovo Y410 Y510