Hi, I now found bug 556232 which matches my problem. With applying the there mentioned "radeon.modeset=0" line in grub the problem is solved at the moment.
Cheers, Andreas -- [intrepid] System freezes when running xrandr with an external monitor plugged - Thinkpad T42 - radeon https://bugs.launchpad.net/bugs/270646 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
