After a quick search of BugZilla it seems that this is a known issue (bug 12904) and there is a work-around - add the following to the boot command line:
acpi_osi="!Windows 2006" I've added a link to this page on the BugZilla bug. Thanks one and all for the support on this so far - hopefully there will be a proper fix in time for 9.10 from upstream :-) -- [iGM45] Connecting external monitor causes system to lock up. https://bugs.launchpad.net/bugs/319717 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
