ubuntu-x-swat team mailing list archive

[Bryce Harrington <bryce@xxxxxxxxxxxxxxxxxxx>]

** Description changed:

  In my Samsung Q45 with Intel GM965 graphics I encounter the following
  problem when using KMS:
  
  After a suspend/resume cycle the internal LVDS always gets enabled,
  whether it was on before or not.
  
  State before suspend/resume: LVDS: off / VGA: 1600x1200
  State after resuming from suspend: LVDS: 1280x800 / VGA: 1600x1200
  
  "xrandr --query" reports that the LVDS is off and it is not possible to
  turn it off by issuing "xrandr --output LVDS --off"
  
  To finally turn the LVDS off it needs to be "enabled" it first by using "xrandr ... --auto". 
  Afterwards it is possible to really turn it off.
  
  Expected behavior:
  - LVDS stays off after resume when it was off before
  
  Sidenote:
  If the displays are configured the other way round (VGA off/LVDS on) a suspend/resume cycle does not enable the VGA output.
+ 
+ 
+ 
+ [lspci]
+ 00:00.0 Host bridge [0600]: Intel Corporation Mobile PM965/GM965/GL960 Memory Controller Hub [8086:2a00] (rev 03)
+     	Subsystem: Samsung Electronics Co Ltd Device [144d:c510]
+ 00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller [8086:2a02] (rev 03)
+     	Subsystem: Samsung Electronics Co Ltd Device [144d:c510]

-- 
Displaystate not remebered after suspend/resume (KMS)
https://bugs.launchpad.net/bugs/432334
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