I am also getting the exact same error since today. I cannot use xorg anymore. I paste more details below.
-- Daniel 01:00.1 Display controller: ATI Technologies Inc RV280 [Radeon 9200] (Secondary) (rev 01) set RMX set primary dac enable primary dac disable TV (II) RADEON(0): RandR 1.2 enabled, ignore the following RandR disabled message. Backtrace: 0: X(xorg_backtrace+0x3b) [0x81314bb] 1: X(xf86SigHandler+0x51) [0x80c57d1] 2: [0xb8088400] 3: X(xf86DiDGAInit+0x2f) [0x80f08cf] 4: X(xf86CrtcScreenInit+0x110) [0x80ed9e0] 5: /usr/lib/xorg/modules/drivers//radeon_drv.so [0xb7b6b114] 6: X(AddScreen+0x19d) [0x80712cd] 7: X(InitOutput+0x206) [0x80adfa6] 8: X(main+0x1db) [0x80719bb] 9: /lib/i686/cmov/libc.so.6(__libc_start_main+0xe5) [0xb7d137a5] 10: X [0x8071051] Fatal server error: Caught signal 11. Server aborting r...@l:/etc# dpkg -l | egrep '(radeon|libc6)' ii libc6 2.9-26 GNU C Library: Shared libraries ii libc6-dev 2.9-26 GNU C Library: Development Libraries and Hea ii libc6-i686 2.9-26 GNU C Library: Shared libraries [i686 optimi ii radeontool 1.5-5 utility to control ATI Radeon backlight func ii xserver-xorg-video-radeon 1:6.12.3-1 X.Org X server -- ATI Radeon display driver ii xserver-xorg-video-radeonhd 1.2.5-1 X.Org X server -- AMD/ATI r5xx, r6xx display r...@l:/etc# -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org