Pretty sure kernel-2.6.17-1.2139_FC5 patch breaks xorg with my laptop Radeon Mobility M300 video card. I did apply this update in parallel with the xorg-x11-server-Xorg-1.0.1-9.fc5.5 update.
To get around this problem I booted the old kernel and disabled DRI in the xorg config which did the trick.
Do other people with Radeon video cards have the same problem?
further info:
log excerpt from /var/log/messages
Jul 4 16:36:08 localhost kernel: ACPI: PCI Interrupt 0000:01:00.0[A] -> GSI 16 (level, low) -> IRQ 16
Jul 4 16:36:08 localhost kernel: Avoiding DRI on Radeon R300+. Use 'allow_r300=1' module option to override
Jul 4 16:36:08 localhost kernel: DRM: Fill_in_dev failed.
log excerpt from Xorg.log:
(II) RADEON(0): Dynamic Clock Scaling Disabled
(II) RADEON(0): BIOS HotKeys Disabled
(WW) RADEON(0): Enabling DRM support
*** Direct rendering support is highly experimental for Radeon 9500
*** and newer cards. The 3d mesa driver is not provided in this tree.
*** A very experimental (and incomplete) version is available from Mesa CVS.
*** Additional information can be found on
http://r300.sourceforge.net
*** This message has been last modified on 2005-08-07.
drmOpenDevice: node name is /dev/dri/card0
drmOpenDevice: open result is -1, (No such device or address)
drmOpenDevice: open result is -1, (No such device or address)
drmOpenDevice: Open failed
drmOpenDevice: node name is /dev/dri/card0
drmOpenDevice: open result is -1, (No such device or address)
drmOpenDevice: open result is -1, (No such device or address)
drmOpenDevice: Open failed
drmOpenByBusid: Searching for BusID pci:0000:01:00.0
drmOpenDevice: node name is /dev/dri/card0
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: Open failed
drmOpenByBusid: drmOpenMinor returns -1023
drmOpenDevice: node name is /dev/dri/card1
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: Open failed
drmOpenByBusid: drmOpenMinor returns -1023
drmOpenDevice: node name is /dev/dri/card2
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: Open failed
drmOpenByBusid: drmOpenMinor returns -1023
drmOpenDevice: node name is /dev/dri/card3
(errors for card4 - card253 deleted)
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: Open failed
drmOpenDevice: node name is /dev/dri/card254
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: open result is -1, (No such device)
drmOpenDevice: Open failed
(II) RADEON(0): [drm] drmOpen failed
(EE) RADEON(0): [dri] DRIScreenInit failed. Disabling DRI.
(II) RADEON(0): Depth moves disabled by default
(II) RADEON(0): Memory manager initialized to (0,0) (1440,8191)
(II) RADEON(0): Reserved area from (0,900) to (1440,902)
(II) RADEON(0): Largest offscreen area available: 1440 x 7289
(II) RADEON(0): Render acceleration unsupported on Radeon 9500/9700 and newer.
(II) RADEON(0): Render acceleration disabled
(II) RADEON(0): Using XFree86 Acceleration Architecture (XAA)