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[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

** Changed in: linux (Ubuntu)
   Importance: Undecided => High

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https://bugs.launchpad.net/bugs/1377265

Title:
  Kubuntu Installer hangs with messed up screen (NVIDIA NV450 graphics
  card)

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  For hardware details please see attached dmesg and X.org.log. Main
  feature suspected to cause issue is nouveau driver in conjunction with
  NVIDIA Quadro NVS450 graphics card.

  The issue occurs with the Kubuntu 14.04 LTS (release) installer and
  the Kubuntu 14.10 (beta 2) installer on my PC.

  Plug in USB stick or use DVD with installer ISO image. Reset. Kernel
  boots. The Keyboard=Man in Circle icon appears at the bottom. After
  some time the kubuntu logo appears and glows. Under 14.04 it then
  simply hangs forever, under 14.10 the screen messes up (black and
  white bricks) and then it hangs forever.

  Switching to a text console in the interim shows that some part of the
  bootstrapping process succeeds, approximately up to the activation of
  the sound driver. The degree of completion of the initialization
  varies over different trials to boot into Kubuntu.

  On some occurences, messages appear about problems with the nouveau
  driver.

  I therefore activated the on-board graphics chip and made it the
  primary graphics device. This altered setup boots nicely into the
  configuration screen. I did not go further and did not install the
  system.

  By the way, I have kubuntu 14.04 LTS running on that PC. It was
  flawlessly installed when I had a different mainboard. Due to a
  hardware defect, I had to change the mainboard. With identical setup
  now apart from the mainboard, the re-installation process fails.

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