Comment # 12 on bug 30620 from auxsvr@gmail.com

Created attachment 68470 [details]
diff -u regs-fail regs-working

I just tried installing openSUSE 12.1 on an old compaq presario 900 with a
broken TFT panel and have exactly the same problem. Setting register 0x0284
does not work, and shortly after reloading radeon with modeset=1 the system
hangs. Is there anything else to try?

The attached diff compares the register values when modeset=0 (working) with
them when modeset=1 (fail).