kernel-packages team mailing list archive

[artik <597070@xxxxxxxxxxxxxxxxxx>]

It's fixed. I switch to this stut.

** Changed in: linux (Ubuntu)
       Status: Incomplete => Fix Released

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/597070

Title:
  Imac Radeon HD 4850 switch "Mini Display Port" output during install
  resulting black screen

Status in “linux” package in Ubuntu:
  Fix Released

Bug description:
  I tried to install Lucid on the new Apple Imac27" with ATI radeon HD
  4850 video card. After selected "install", the screen goes black. few
  investigations later, I discovered display output switch to the Mini
  Display Port. So, I tried to connect a second screen, and I was right
  : just after select "install lucid", the video output switch to the
  second screen, and the main screen turn black.

  I continue my installation using my 2nd screen (connected to the mini
  display port), and after it, I'm on the desktop. I activate Open
  radeon drivers, they works perfectly, but in the second screen (Vsync
  is perfect, and very smooth using compiz). Impossible to switch to the
  main screen. It's not recognized, and stay black.

  I tried proprietary ati drivers (10.6). With them, I can activate my
  main screen, but they are not better than the open ones : there is a
  big vsync bug. Actually, It's totally impossible for a normal user to
  use open ati drivers on the main screen with an Imac27 and ati radeon
  4850 graphic card.

  I think issue is in the kms driver, I tried to deactivate them. Main
  screen is recognized, but impossible to turn it on, it stay black, and
  Vsync issue re-appear on the second screen. Maybe the open radeon
  drivers also got a bug, cause after deactivate them, my main screen is
  now recognized on display manager, but impossible after activate it,
  it stay black => back to proprietary drivers, and the Vsync issue)

  i tried 2.6.32, 2.6.34, 2.6.35 rc1 released, bug is still here.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/597070/+subscriptions