Comment 27 for bug 273510

I'm having this problem with a fresh install of Kubuntu Jaunty, using either the radeon or the fglrx driver.
Hardware:

- Asus M2A-VM motherboard
- Sapphire Radeon HD 4670 graphics card installed
- DELL E248 WFP LCD display (24'', 1920 x 1200 native)

Hardy works fine on the machine, when I install Jaunty into a separate partition I'm running into problems.

The symptoms are the same as describe above:

- When trying to start from the standard CD, the screen turns to black after the boot screen disappears. The display goes into powersafe eventually
- Installing from the alternate CD works fine. When trying to boot the installed system, the screen turns black again when the KDM screen ought to appear. I can switch to the console via ctrl-alt-F1 when using the radeon driver, but not when using fglrx. Looking through Xorg.0.log I can't find anything that points to a problem.

I've run radeontool both on the Jaunty install and on the working Hardy install (using the radeontool version from the Jaunty install in both cases). I'll upload the resulting reports, Xorg.0.log and the result of lspci as run on the Hardy install.

If I can provide any additional information, please tell me what you need. This problem is a blocker for me, and I appreciate any help I can get.