Version: unspecified (using KDE 4.4.3) OS: Linux When an external monitor is connected to a Thinkpad T60 and the user uses System Settings -> Display to disable either internal or external monitor, the remaining "on" display is corrupted. Reproducible: Always Steps to Reproduce: 1. Connect external monitor and boot. 2. Log into KDE. 3. Start System Settings -> Display; disable one display. Actual Results: Remaining "on" display is corrupted, shows partial content from both previous displays: approximately 80 percent is a "squished" empty desktop of the now disabled display; approximately 20 percent is the left or right edge of the previous content of the other display. Expected Results: Disabled display goes dark and is removed from desktop area; remaining display is unchanged. Partial workaround: Rather than disabling displays in KDE, I use $HOME/.xsession to call xrandr to disable display: xrandr --output VGA --off startkde This makes it possible to disable the display before logging in, since disabling the display from within KDE leads to a corrupted desktop that is impossible to use. Additional bug: When xrandr is called this way before startkde, calling System Settings -> Desktop within KDE causes all screens to go dark until Xorg is manually killed.
"Remaining "on" display is corrupted, shows partial content from both previous displays: approximately 80 percent is a "squished" empty desktop of the now disabled display; approximately 20 percent is the left or right edge of the previous content of the other display." can you provide a screen shot of this? thanks. "When xrandr is called this way before startkde, calling System Settings -> Desktop within KDE causes all screens to go dark until Xorg is manually killed." just opening the control panel makes things go dark? can you still see the windows (and just the desktop layer itself is gone) or are all the screens just completely turned off?
as mentioned, please provide a screenshot and retest with kde 4.5
Closing for lack of feedback. Please feel free to reopen this report if you can still reproduce this with KDE 4.8.3 or later.