Luis's fried graphics card might have been a red herring. I am getting what appears to be the same problem; "GPU lockup - switching to software fbcon" on an Asus "P4C800 Deluxe" motherboard with XFX GF 7600 GS graphics card.
I am getting this problem with Ubuntu 14.04 Desktop LTS in a very easy- to-reproduce way: Boot normally, then just wait: about 8 minutes after boot completes, the time display stops incrementing. When I switch to the text console (CTL-ALT-F1), it reports "GPU lockup - switching to software fbcon" before the login prompt. A COUPLE OF WORKAROUNDS: I discovered a temporary work-around, too: if I enter the text console via <CTL-ALT-F1> immediately after the desktop comes up and then return to the desktop via <CTL-ALT-F7>, then I don't encounter the lock-up. Another work-around for my system: the problem went away after installing generic i386 kernel from http://kernel.ubuntu.com/~kernel- ppa/mainline/v4.1-rc1-vivid/ I believe this to be related to another issue with a crash in the nouveau driver and the exact same work-arounds that I described when I filed the problem report https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1449299 -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-nouveau in Ubuntu. https://bugs.launchpad.net/bugs/1253068 Title: Constant GPU Lock-ups with Ubuntu 14.04 13.04 and 13.10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-nouveau/+bug/1253068/+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
