I don't know that I can add enough information to solve this for everyone, but I suspect that I can help for some people. I have two Dell laptops that have been plagued in 12.04, and I've observed enough to know that there are probably multiple bugs at work here, and that is why it is difficult to solve.
One bug is predominantly X related. It causes spurious logouts and freezes that only affect X (i.e. you can still SSH in). I've done so many things that I can't even count what might have fixed it, but this hardly ever happens to me now. I followed lots of advice, but I suspect one of 3 things was the final solution on my Dell XPS 14 (Intel video, Intel wireless, i5-3317U CPU): installing the X swat updates "deb http://ppa.launchpad.net/ubuntu-x-swat/x-updates/ubuntu precise main", upgrading to a new kernel (currently 3.5.5), or switching to the 2D interface. My daughter has my old Dell Inspiron 15, and she is still experiencing lockups with her laptop. I am very confident that her lockups come from the built-in Intel wireless, particularly when the computer gets to the edge of a hot spot where the signal is spotty (dmesg shows problems briefly before the computer locks up and the weak wireless is almost a sure trigger). I think there has been a regression in the Intel wireless drivers because it was solid for years and then got crappy about a year ago. I decided to order a USB wireless ethernet adapter this week and just disable the internal wireless, and I expect that to solve her problems as well. I'm disappointed by this, because of course I specifically chose Intel wireless when I bought that machine years back for the reliable drivers. So, perhaps nothing here will close the bug, but maybe it'll help someone else. -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/993187 Title: ubuntu 12.04 completely freezes frequently. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/993187/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
