[Bug 27355] [R300] Xorg freezes if EXANoComposite is disabled

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=27355





--- Comment #8 from Rafael Antonio Porras Samaniego <SpOeK at DistroBit.Net>  2010-03-31 12:00:24 PST ---
Created an attachment (id=34586)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=34586)
kernel output with drm.debug=1

I booted Linux with radeon.modeset=0, drm.debug=1 and EXANoComposite disabled.
The attachment is the resulting output from dmesg.
Also, I've attached gdb to X and tried to watch where is the process stalled.
This is what I've found:

(gdb) c
Continuing.
^C
Program received signal SIGINT, Interrupt.
0xb777a424 in __kernel_vsyscall ()
(gdb) bt
#0  0xb777a424 in __kernel_vsyscall ()
#1  0xb74d18c9 in ioctl () from /lib/libc.so.6
#2  0xb73574bb in drmDMA () from /usr/lib/libdrm.so.2
#3  0xb726bfe7 in ?? () from /usr/lib/xorg/modules/drivers/radeon_drv.so
#4  0x0000000b in ?? ()
#5  0xbfa780cc in ?? ()
#6  0xbfa780a4 in ?? ()
#7  0x080777a7 in dixLookupPrivate ()
#8  0xb726c439 in ?? () from /usr/lib/xorg/modules/drivers/radeon_drv.so
#9  0x0921b690 in ?? ()
#10 0x0000000d in ?? ()
#11 0xbfa7815c in ?? ()
#12 0x00000010 in ?? ()
#13 0x09228fb0 in ?? ()
#14 0xb70951b4 in ?? () from /usr/lib/xorg/modules/libexa.so
#15 0x09228e60 in ?? ()
#16 0x080777a7 in dixLookupPrivate ()
#17 0xb73086a8 in ?? () from /usr/lib/xorg/modules/drivers/radeon_drv.so
#18 0x0921b690 in ?? ()
#19 0x00000001 in ?? ()
#20 0xa2ba3008 in ?? ()
#21 0x00000000 in ?? ()

I know that this is very basic information and possibly not very useful but I
don't know how can I extract more information from my system. Any hint would be
appreciated.

P.S.: I work as a coder and I've coded some Linux kernel modules and a driver
for Windows, so I could be more helpful, but I don't have any idea about the
Linux graphics drivers stack so I'm completely lost. Sorry!


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