@joseph, the problem is still there with both versions of the kernel that you suggested I try.
Firstly, I confirmed that the problem is still there in 3.0.0-16 (I think this is the latest release kernel) under 11.10. I booted with my laptop being UN-docked and, as usual, all was fine. I was able to download the kernel images you suggested and installed them. I then booted under 11.10 kernel 3.0.16 with my laptop DOCKED. I left it at the X (GUI) login screen for ~3 minutes and as usual it hung necessitating a hard rest. OK - so I knew the problem is still there and reproducible. I then booted DOCKED into 3.2.14 and because I only installed the kernel image I just got the character screen terminal login (No X). I waited for 5 minutes and was able to login. I logged out and waited again but was still able to login. Then I typed sudo shutdown 0 and in typing my password the system hung. When this happens the screen freezes and the keyboard doesn't respond at all (including ALT+Fx. Caps lock, etc). It requires a hard reset at this point. I then booted DOCKED into 3.4.0rc2 and this time I waited 5 minutes at the terminal login screen and it had hung as above. Another hard reset. Finally I booted 3.2.14 whilst UN-docked and used it at the character terminal for 10-15 mins with no problems whatsoever. I can use 11.10 kernel 3.x all day long when UN-docked with no problems. I can use 10.10 kernel 2.x all day long DOCKED or UN-docked with no problems. The problem appears to be readily reproducible whenever my laptop is DOCKED under 11.10 with a 3.x kernel. That said I have had a VERY small number of occasions when I was able to use 11.10 DOCKED for 10-180 minutes before it finally hangs. But this has happened so few times it's almost not important. It always hangs eventually. I mention it in case it helps to narrow down the issue. What would you like me to try next? Many thanks for your help with this. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/908335 Title: Kernel Hard Freezing Very Often To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/908335/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
