Bug#714510: xserver-xorg-video-radeon: Display corrupted after resume on ATI Radeon HD 2400 XT

[Alex Deucher]

On Sun, Jun 30, 2013 at 3:59 AM, Tobias Gerdin <tobias.gerdin at gmail.com> wrote:
> Package: xserver-xorg-video-radeon
> Version: 1:6.14.4-8
> Severity: important
> Tags: upstream
>
> Dear Maintainer,
>
> After resuming system after a suspend (to RAM) the display is corrupted. It is still
> possible to see what's going on but everything turns into a highly unhealthy-looking
> (for the display) green-orange flickering mess.
>
> The system is this Apple iMac, see:
> http://www.everymac.com/systems/apple/imac/specs/imac-core-2-duo-2.0-20-inch-aluminum-specs.html
>
> I have never gotten this to work in Linux I think, and it's the only issue that keeps me
> from switching to Linux from OS X (sounds works now as of the Wheezy release).
>
> I observe the same issue on Ubuntu (tried 12.04LTS and 13.04).
>

You might try a newer kernel or if you are using EFI to boot, try
using the legacy bios option.  Unfortunately, macs do just about
everything differently you may need some sort of mac specific quirk to
make it work properly, especially with EFI boot.

Alex