Public bug reported: Discussion and workarounds here: http://askubuntu.com/questions/126193/ubuntu-12-04-stuck-at-the-login-screen specs: CPU: Intel i7 980x extreme edition, Motherboard: Asus Rampage III extreme, RAM: 6GB, GPUs: 2x NVidia GTX 580 in SLI, HDD: Western digital 1TB green power (20GB for root (/), 6GB for swap, all the rest for /home)
Probably affects GTX590 too. There are two problems: 1) During installation there is freeze right after the lightdm(?) GUI starts. I see the cog/keyboard/accessibility on the top right, but cannot click them. The Try Ubuntu/Install Ubuntu window with the languages on the left never comes up, or sometimes a distorted and unusable version of it comes up. [workaround: http://askubuntu.com/a/126416/57256] 2) If you use the workaround or the alternative installer to install (or even an upgrade from a fresh 11.10), then you get a freeze right after the lightdm login screen comes up. [workaround: http://askubuntu.com/a/126336/57256] When pressing Ctrl-Alt-F1, the following message appears: [drm] nouveau 0000:03:00.0: GPU lockup-switching to software fbcon The switch never happens though, I only had the lockup part. As outlined in the discussion, the problem is fixed with sudo-apt-get update, sudo-apt-get upgrade, and then installing the nvidia driver. I therefore assume there is something wrong in the nouveau driver. Also note that 11.10 does not have this problem. Also, this bug affects both 32-bit and 64-bit. ** Affects: libdrm (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to libdrm in Ubuntu. https://bugs.launchpad.net/bugs/990411 Title: Ubuntu 12.04 nouveau lockup with GTX580 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libdrm/+bug/990411/+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
