[Bug 990411] Re: Ubuntu 12.04 nouveau lockup with GTX580

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** Tags added: kubuntu

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Title:
  Ubuntu 12.04 nouveau lockup with GTX580

Status in “libdrm” package in Ubuntu:
  Confirmed

Bug description:
  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.

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