Created attachment 27681 [details] xrandr --verbose output with working external monitor I activate my external monitor with $ xrandr --output DVI-0 --off $ xrandr --output HDMI-0 --auto --left-of LVDS Every third or fourth time the monitor does either get no signal it can use at all, or it shows a garbled screen. It looks a bit like back in the days when the refresh frequency of an analog monitor was not ok. The only thing I can do to get a usable image is to reboot. Enabling and disabling of the output devices does not help. I am completely lost, when it comes to debugging this. I will attach the "xrand --verbose" output of the working and non-working case, but I could find no major difference. You can find my config in bug 22744. Driver version is 6.12.2, Kernel 2.6.30. Tell me if I can give you any further information.
Created attachment 27682 [details] xrandr --verbose output with non-working external monitor
This is likely related to the lack of router object support. *** This bug has been marked as a duplicate of bug 18564 ***
Ok, if you say so. I just wonder why it works in the majority of cases and if it does not work the monitor still gets a signal, just a crappy one. In bug 18564 there seems to be no signal at all. Anyway, I'm CCed to 18564 and if there is something new to test I will try to test it.
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