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I started having this weird problem some time ago, it's important to note that I haven't had this problem right after installing Arch.
After waking my laptop from sleep I get a brief black screen with "ACPI: unable to dock" error message and then the desktop shows up but with a resolution of 1333x750 which oddly enough does not match any mode reported by xrandr, and I can't manually switch to any other resolution untill I either log off and logon or reboot the laptop.
Here's the xrandr output, right after resume:
Screen 0: minimum 320 x 200, current 1600 x 900, maximum 8192 x 8192
LVDS1 connected 1333x750+0+0 (normal left inverted right x axis y axis) 310mm x 174mm
1600x900 60.0*+
1024x768 60.0
800x600 60.3 56.2
640x480 59.9
VGA1 disconnected (normal left inverted right x axis y axis)
HDMI1 connected 1600x900+0+0 (normal left inverted right x axis y axis) 698mm x 392mm
1920x1080 50.0*+ 60.0 24.0 30.0 25.0
1680x1050 59.9
1680x945 60.0
1400x1050 59.9
1600x900 60.0
1280x1024 60.0
1440x900 59.9
1280x960 60.0
1366x768 60.0
1360x768 60.0
1280x800 59.9
1280x768 60.0
1280x720 60.0 50.0
1440x576 25.0
1024x768 60.0
1440x480 30.0
1024x576 60.0
800x600 60.3 56.2
720x576 50.0
848x480 60.0
720x480 59.9
640x480 59.9 59.9
normal xrandr output:
Screen 0: minimum 320 x 200, current 1600 x 900, maximum 8192 x 8192
LVDS1 connected 1600x900+0+0 (normal left inverted right x axis y axis) 310mm x 174mm
1600x900 60.0*+
1024x768 60.0
800x600 60.3 56.2
640x480 59.9
VGA1 disconnected (normal left inverted right x axis y axis)
HDMI1 connected 1600x900+0+0 (normal left inverted right x axis y axis) 698mm x 392mm
1920x1080 50.0*+ 60.0 24.0 30.0 25.0
1680x1050 59.9
1680x945 60.0
1400x1050 59.9
1600x900 60.0
1280x1024 60.0
1440x900 59.9
1280x960 60.0
1366x768 60.0
1360x768 60.0
1280x800 59.9
1280x768 60.0
1280x720 60.0 50.0
1440x576 25.0
1024x768 60.0
1440x480 30.0
1024x576 60.0
800x600 60.3 56.2
720x576 50.0
848x480 60.0
720x480 59.9
640x480 59.9 59.9
kernel version:
3.5.6-1-ARCH
graphic card:
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
* I have an external tv connected to the laptop using a DP to HDMI cable, after booting I set the resolution using:
xrandr --output LVDS1 --mode 1600x900 --output HDMI1 --mode 1920x1080 --scale 0.833x0.833
Last edited by Greed1sGood (2012-10-14 13:43:34)
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