As a workaround, you can disable KMS by giving radeon.modeset=0 to the kernel line.
You'll need to do it: 1. For the live CD (hit F6) 2. For the first boot after installation (hold shift to get the GRUB menu, press E to edit the boot entry) The updated kernel line should end with: (…) quiet splash radeon.modeset=0 3. To make it permanent, set the GRUB_CMDLINE_LINUX variable in /etc/default/grub like this: GRUB_CMDLINE_LINUX="radeon.modeset=0" Don't forget to run update-grub afterwards. Affected laptops include at least: - the Lenovo X100e I use; - the HP Compaq 6735b mentioned in the upstream bug report. ** Tags added: freeze -- [rs780] System freeze on backlight change with KMS https://bugs.launchpad.net/bugs/570835 You received this bug notification because you are a member of Ubuntu-X, which is the registrant for xserver-xorg-driver-ati. _______________________________________________ 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
