linux-kernel - DRM troubles with kernel >=2.6.33

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Date:	Tue, 20 Sep 2011 23:26:41 +0400
From:	Антон Новиков 
	<tonn.post@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: DRM troubles with kernel >=2.6.33

Hi.
I've got laptop dell inspiron 1521 with ati x1270 (rs690).
Since kernel version 2.6.33 while I turn KMS on all opengl programms
hangs with backtrace like this:
~/ $ gdb `which glxgears`
...
(gdb) bt
#0  0x00007ffff761ccb8 in poll () from /lib64/libc.so.6
#1  0x00007ffff63c2b5a in ?? () from /usr/lib64/libxcb.so.1
#2  0x00007ffff63c474c in xcb_wait_for_reply () from /usr/lib64/libxcb.so.1
#3  0x00007ffff7259375 in _XReply () from /usr/lib64/libX11.so.6
#4  0x00007ffff7bb3cda in ?? () from /usr/lib64/opengl/xorg-x11/lib/libGL.so.1
#5  0x00007ffff7bb1b79 in ?? () from /usr/lib64/opengl/xorg-x11/lib/libGL.so.1
#6  0x00007ffff48dd7a1 in ?? () from /usr/lib64/dri/r300_dri.so
#7  0x00007ffff48de7b9 in ?? () from /usr/lib64/dri/r300_dri.so
#8  0x00007ffff492392a in ?? () from /usr/lib64/dri/r300_dri.so
#9  0x00007ffff4924ea6 in ?? () from /usr/lib64/dri/r300_dri.so
#10 0x00007ffff4a4dac8 in ?? () from /usr/lib64/dri/r300_dri.so
#11 0x00007ffff4a53fda in ?? () from /usr/lib64/dri/r300_dri.so
#12 0x0000000000401c9e in ?? ()
#13 0x0000000000403332 in ?? ()
#14 0x00007ffff756febd in __libc_start_main () from /lib64/libc.so.6
#15 0x0000000000401a79 in ?? ()
#16 0x00007fffffffe2e8 in ?? ()
#17 0x000000000000001c in ?? ()
#18 0x0000000000000001 in ?? ()
#19 0x00007fffffffe63b in ?? ()
#20 0x0000000000000000 in ?? ()

I've tried different versions of xf86-video-ati, mesa (classic,
gallium), but this trouble depends only on kernel version.
If I turn off kms - all works fine but only in classic mode.
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