When I run Xorg -configure I get a fatal error in which the last lines are:
(EE) [drm] No DRICreatePCIBusID symbol
Number of created screens does not match number of detected devices.
From google I found these relevant messages
http://forums.gentoo.org/viewtopic-t-84 ... art-0.html
http://lists.debian.org/debian-user/201 ... 00674.html
I have tried commenting dri2, dri, and glx from the generated xorg.config.new file, and the result was a black X11 screen. So no failure, but it didn't work as well.
I can also see that on the generated xorg.conf.new the Device section lists the nouveau driver.
lsmod shows that nouveau is loaded, and dmesg also prints info/success messages about nouveau (apart from a: failed to evaluate _DSM: 5).
Also checked http://nouveau.freedesktop.org/wiki/ and on the news it says:
If this is my problem, and my packages are all updated, then this may be a bug in Debian packages.12.10.2010 posted by xavier
libdrm API break: You need to update libdrm, ddx and mesa together as of today. ddx and mesa won't even compile without updating libdrm. Relevant commits: drm1 drm2 ddx mesa