Ubuntu
xserver-xorg-video-ati package

  1. Bug #727620
  2. Comment #16

Comment 16 for bug 727620

Revision history for this message
Johan Fornander (fornander-johan) wrote : Re: [Radeon HD 5650 and 5470] Driver crash during recovery boot and in normal boot (Regression from 2.6.38-3 to -4)

I have a theory... Maybe there is a race condition between the intel and ati driver involved here? My notebook starts up in two seemingly random configurations, or three including the radeon crash:

1. X server is on VT8 -> unable to unload radeon module because it is in use (by some framebuffer I guess). I am also unable to switch to consoles VT1-7. If I use vga_switcheroo to switch to integrated gpu in this mode then radeon crashes.

2. X server is on VT7 -> I can unload the radeon module and use the consoles VT1-6. vga_switcheroo works and I can also use acpi calls to turn off the gpu.

3. The radeon driver crashes. Forcing reboot through RSEIUB.

This makes it difficult to control the temperature since I cannot know if the radeon module is in use or not (i.e. I might or might not be able to use the vga_switcheroo, or unload the module and use a specific acpi call to shut of the gpu).