[Bug 19803] [HD3870] Blank screen when GDM starts

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=19803





--- Comment #14 from Rune Svendsen <runesvend at gmail.com>  2009-02-01 05:33:14 PST ---
(In reply to comment #13)
> 
> http://wiki.debian.org/XStrikeForce/HowToRandR12
> 

After reading that wiki page I tried the following:

Boot an Ubuntu Intrepid Live CD. When the monitor goes blank get to a console
by pressing Ctrl+Alt+F1.

Copy the driver radeon_drv.so that I compiled from the git source to where the
older radeon_drv.so that is included in Intrepid is located. After doing this
GDM starts correctly with the resolution 2048x1536.
While using the functioning radeon driver in this working resolution I run the
command "./avivotool regs all" as root and I'm attaching the output of this as
the file "regdump_avivotool_good_2048x1536.txt".

After doing this I tried changing the resolution to 1024x768 by running the
following command:

   $ xrandr -display :0.0 --output DVI-0 --mode 1024x768

This causes the monitor to go blank and I get to a console by pressing
Ctrl+Alt+F1.