I noticed that during boot I get the message "Disabling IRQ 16" so checked out debugging IRQ porblems.
https://help.ubuntu.com/community/DebuggingIRQProblems I tried all of the examples and none had any effect except irqpoll which allowed the mouse to move but the rest of the system still locked up. I did however notice that in 13.04 the lock up does not start until login. If I leave the machine at the login screen it is ok (mouse and keyboard input is ok and menus work fine with no lag). Shortly after logging in however the machine completely locks up and needs either the battery or power cord taking out to "fix" -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217367 Title: E5420 Laptop freezes whilst charging and below 90% battery (approx) 13.04 12.04 10.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1217367/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
