Same here, nvidia card+nouveau driver. I can reproduce the error with:
xrandr --output VGA-1 --above LVDS-1 most other xrandr commands work. (I have HDMI port here but it is not used at the moment, only laptop screen + external VGA) xrandr hangs, I can still ssh into the machine. I'm using Xfce 4.10. I remember spuriously seeing similar behavior (black screen) in Ubuntu 11.10 but it was going away after reboot. So far, in 12.04 it happens consistently. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/989347 Title: [BUG: ../../dix/getevents.c:850 in scale_to_desktop()] black screen if second monitor is connected in HDMI. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/989347/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
