Crashing X-server after last night f12 upgrade kde-unstable

[Gene Smith]

After starting system this evening I see no display. Can't get terminal using
alt-F* keys either. Only way to get in was via ssh. Below is the crash part of
Xorg.0.log. 

After upgrade last night it kept working OK but didn't reboot then. Actaully
upgrade to 4.4 several days with several intervening boots, until today...

Not sure if this is KDE problem or just another radeon driver problem?

:
:
(II) RADEON(0): Acceleration enabled
(==) RADEON(0): DPMS enabled
(==) RADEON(0): Silken mouse enabled
(II) RADEON(0): Set up textured video
Output CRT1 disable success
(II) RADEON(0): DIG0 transmitter: Coherent Mode enabled
Output DIG0 transmitter setup success
Blank CRTC 0 success
Disable CRTC memreq 0 success
Disable CRTC 0 success
Blank CRTC 1 success
Disable CRTC memreq 1 success
Disable CRTC 1 success

Backtrace:
0: /usr/bin/X (xorg_backtrace+0x28) [0x49ecc8]
1: /usr/bin/X (0x400000+0x61cf9) [0x461cf9]
2: /lib64/libpthread.so.0 (0x3b12a00000+0xf0f0) [0x3b12a0f0f0]
3: /usr/bin/X (xf86GetPrimaryOutput+0x35) [0x4819a5]
4: /usr/bin/X (xf86SetDesiredModes+0x8b) [0x483dbb]
5: /usr/lib64/xorg/modules/drivers/radeon_drv.so (0x7f462205f000+0x46f2e)
[0x7f46220a5f2e]
6: /usr/bin/X (AddScreen+0x1d4) [0x4278b4]
7: /usr/bin/X (InitOutput+0x7b4) [0x470164]
8: /usr/bin/X (0x400000+0x21c5a) [0x421c5a]
9: /lib64/libc.so.6 (__libc_start_main+0xfd) [0x3b11e1eb1d]
10: /usr/bin/X (0x400000+0x219a9) [0x4219a9]
Segmentation fault at address 0xa0

Fatal server error:
Caught signal 11 (Segmentation fault). Server aborting