Hi,
Since 3.16 an external monitor stays dark after resume from sleep. I didn't manage to activate it again with xrand. According to xrandr it is "connected" and configured with a mode, but I get no signal.
Happens since 3.16 and is still broken with 3.17-rc5.
Hardware: HP EliteBook 8540w 01:00.0 VGA compatible controller: NVIDIA Corporation GT215GLM [Quadro FX 1800M] (rev a2) 0
External Monitor connected via DVI on the docking station.
XRandR before amd after suspend looks the same:
$ xrandr Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192 LVDS-1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 345mm x 194mm 1920x1080 59.9*+ 60.0 1680x1050 60.0 1400x1050 60.0 1280x1024 59.9 1280x960 59.9 1152x864 60.0 1024x768 59.9 800x600 59.9 640x480 59.4 720x400 59.6 640x400 60.0 640x350 59.8 DP-1 disconnected (normal left inverted right x axis y axis) DP-2 disconnected (normal left inverted right x axis y axis) eDP-1 disconnected (normal left inverted right x axis y axis) DP-3 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 598mm x 336mm 1920x1080 60.0*+ 1680x1050 59.9 1280x1024 75.0 60.0 1440x900 75.0 59.9 1024x768 75.1 60.0 800x600 75.0 60.3 640x480 75.0 72.8 66.7 60.0 720x400 70.1 VGA-1 disconnected (normal left inverted right x axis y axis)
dmesg output of a suspend/resume cycle attached.