[Bug 75723] (regression since Linux 3.14?) brw_get_graphics_reset_status: Assertion `brw->hw_ctx != ((void *)0)' failed

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=75723

--- Comment #11 from Tasev <tasev.stefanoska at skynet.be> ---
Hi,

I also have this bug , my system is:

Kubuntu Trusty Thar

Intel(R) Pentium(R) CPU  P6000  @ 1.87GHz in HP G72 notebook

glxinfo | grep OpenGL
OpenGL vendor string: Intel Open Source Technology Center
OpenGL renderer string: Mesa DRI Intel(R) Ironlake Mobile 
OpenGL version string: 2.1 Mesa 10.1.0
OpenGL shading language version string: 1.20

I try the proposed patch with

sudo apt-get build-dep mesa
apt-get source mesa
cd mesa*/

Then a change the line proposed in the patch in
/src/mesa/drivers/dri/i965/brw_context.c

dpkg-source --commit
dpkg-buildpackage

sudo dpkg -i libgl1-mesa-dri libgl1-mesa-glx

Then i reboot but the bug is still there , kwin crashes if i enable desktop
effects, 
here is the krash log:

Thread 1 (Thread 0x7f6418790800 (LWP 2353)):
[KCrash Handler]
#5  0x00007f6417ea2f79 in __GI_raise (sig=sig at entry=6) at
../nptl/sysdeps/unix/sysv/linux/raise.c:56
#6  0x00007f6417ea6388 in __GI_abort () at abort.c:89
#7  0x00007f6417e9be36 in __assert_fail_base (fmt=0x7f641877e05f
"%s%s%s\302\240:%u\302\240:\302\240%s%s 
l'assertion \302\253\302\240%s\302\240\302\273 a \303\251chou\303\251.\n%n", 
assertion=assertion at entry=0x7f63f3cf2a63 "brw->hw_ctx != ((void *)0)",
file=file at entry=0x7f63f3cf2a28
"../../../../../../../src/mesa/drivers/dri/i965/brw_reset.c",
line=line at entry=43, 
function=function at entry=0x7f63f3cf2a80 "brw_get_graphics_reset_status") at
assert.c:92
#8  0x00007f6417e9bee2 in __GI___assert_fail (assertion=0x7f63f3cf2a63
"brw->hw_ctx != ((void *)0)", 
file=0x7f63f3cf2a28
"../../../../../../../src/mesa/drivers/dri/i965/brw_reset.c", line=43, 
function=0x7f63f3cf2a80 "brw_get_graphics_reset_status") at assert.c:101

I try also with the final 3.14 kernel from the mainline ppa and also with the
latest mesa an libdrm from the oibaf ppa with the same result

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