I just built the x.org CVS and attempted to use the "radeon" driver on my Radeon
9000 and experienced a very garbled display.
It seems like it is similar to bug 205 in description but much worse.
I can't make out anything at all, the cursor is garbled as is the entire screen.
Here is a link to a screenshot. When on the machine it is constantly moving so
it seems clearer from the screenshot than it really is onscreen.
This happens with, or without the composite extension, when composite is enabled
and I run xcompmgr the display cleans up quite a bit but still is garbled,
especially the mouse and text fields.
Having no luck with the radeon driver I installed the fglrx binary drivers and
the display is perfectly clean, althought I do experience bug 1011 (again, with
or without composite enabled) and xcompmgr is quite slow.
I am running Debian Sid, recently upgraded.
I'm experiencing the same problem on Gentoo, xorg 2.6.8 with a Radeon 9800 Pro card.
I also have this behaviour, my vga is an Radeon 9600XT, and i have a fresh
install of gentoo (gcc 3.4.3, kernel-2.6.10-r6, glibc-2.3.4).
By the way, that also happens when, i use "ati" driver, instead of radeon.
This is a major, please correct it :)
Do you need xorg.conf.
Already know, what happens. I've use the lastes snapshots of dri, that already
as r300 microcode. With drm r300 microcode loaded, radeon driver doesn't work well.
In my case i've downloaded a drm of 25 of december and all works well now.
Does the problem still happen if you add Option "ColorTiling" "false" to your
Device section in xorg.conf ?
I can no longer test this as my laptop died on me (power connector issue that
seems to plauge inspiron 5150's) but I did get this to work.
The problem seemed to be that loading the ati proprietary kernel module, and
then attempting to use the composition manager flaked out the display. If I
prevented the module from loading, rebooted, and then used all opensource
drivers from the get-go the problem didn't surface.