X locks when deactivating composite effects

[john terragon]

Hi,

whenever I deactivate the composite effects the x server locks up and I get the following in the Xorg log file:

------------------------------------------------------------------
Backtrace:
0: /usr/bin/X(xf86SigHandler+0x79) [0x80c1659]
1: [0xa7fc7400]
2: /usr/lib/xorg/modules/extensions//libdri.so(DRIGetDrawableInfo+0x2e) [0xa7fb911e]
3: /usr/lib/xorg/modules/extensions//libglx.so [0xa7b24c6e]
4: /usr/lib/dri/radeon_dri.so(__driUtilUpdateDrawableInfo+0xc1) [0xa2d28011]
5: /usr/lib/dri/radeon_dri.so(radeonGetLock+0x75) [0xa2d2fe05]
6: /usr/lib/dri/radeon_dri.so(radeonFlushCmdBuf+0x90) [0xa2d2d910]
7: /usr/lib/dri/radeon_dri.so(radeonDestroyContext+0xbd) [0xa2d2c0cd]
8: /usr/lib/dri/radeon_dri.so [0xa2d27ec7]
9: /usr/lib/xorg/modules/extensions//libglx.so [0xa7b26849]
10: /usr/lib/xorg/modules/extensions//libglx.so(__glXFreeContext+0x89) [0xa7b1bae9]
11: /usr/lib/xorg/modules/extensions//libglx.so [0xa7b1bb37]
12: /usr/bin/X(FreeResourceByType+0xe2) [0x80732f2]
13: /usr/lib/xorg/modules/extensions//libglx.so [0xa7b17e07]
14: /usr/lib/xorg/modules/extensions//libglx.so [0xa7b1be9a]
15: /usr/bin/X(Dispatch+0x34f) [0x808b74f]
16: /usr/bin/X(main+0x47d) [0x80713ed]
17: /lib/i686/cmov/libc.so.6(__libc_start_main+0xe5) [0xa7bf7455]
18: /usr/bin/X(FontFileCompleteXLFD+0x20d) [0x80707d1]

Fatal server error:
Caught signal 11.  Server aborting

(II) UnloadModule: "kbd"
(II) UnloadModule: "mouse"
(II) AIGLX: Suspending AIGLX clients for VT switch
(EE) RADEON(0): RADEONWaitForIdleCP: CP idle -22
(EE) RADEON(0): Idle timed out, resetting engine...
(EE) RADEON(0): RADEONWaitForIdleCP: CP reset -22
(EE) RADEON(0): RADEONWaitForIdleCP: CP start -22
(EE) RADEON(0): RADEONWaitForIdleCP: CP idle -22

-------------------------------------------------------------

And the RADEONWaitForIdleCP things are repeated continously.

Some info about the system
Card: radeon mobility M7 
Xserver: 1.5.2
Distro: Debian
linux kernel: 2.6.27.5 (but it was the same with 2.6.26)
radeon driver: 6.9.0+git20081012

Has anyone ever seen anything like this?

John