WARNING: I am not an expert. No real experts seem to respond to this bug report, but people seem to work on almost the same problem in Bug #537640 . So I think the best thing is to wait.
But if you need the dual display badly...I looks like it is a kernel problem, so I tried something like this: http://swiss.ubuntuforums.org/showpost.php?p=9223503&postcount=30 but installing (in this order): linux-headers-2.6.34-020634rc7_2.6.34-020634rc7_all.deb linux-headers-2.6.34-020634rc7-generic_2.6.34-020634rc7_amd64.deb linux-image-2.6.34-020634rc7-generic_2.6.34-020634rc7_amd64.deb and adding "options radeon.dynpm=1" to /etc/modprobe.d/radeon.conf It looks like the two displays work for me, but it gives still some strange, unhealthy-looking graphical noise at boot. WARNING: I am not an expert. These kernels are not fully tested by the Ubuntu team and not officially released, so your system can maybe become unstable. I also uninstalled the last kernel update 2.6.32.22, because that kernel seems not to work. -- [Lucid AMD64] Dual monitor distortion / crash - ATI mobility Radeon X1400 https://bugs.launchpad.net/bugs/573290 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs