I think I found what was wrong for me : it's the ethernet atl1c driver ! I had freezes on 12.04 and on 12.10. I unpluged my ethernet, that used atl1c driver, and only use wifi now, and no more random freezes.
As I could find on the net, atl1c is still marked as experimental ! They changed some things in one of the 3.2.x kernel (I can't say what, I don't understand every technical things..) and it seems worse for more people now. See : https://brainwreckedtech.wordpress.com/2012/05/31/linux-and-flaky-atl1c-support/ http://cateee.net/lkddb/web-lkddb/ATL1C.html -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to 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 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
