Bug 13545 - [COMPIZ] compiz cause X crashed
Summary: [COMPIZ] compiz cause X crashed
Alias: None
Product: xorg
Classification: Unclassified
Component: Server/Ext/DRI (show other bugs)
Version: git
Hardware: Other Linux (All)
: high major
Assignee: Default DRI bug account
QA Contact: Xorg Project Team
Depends on:
Reported: 2007-12-06 01:22 UTC by Shuang He
Modified: 2008-01-30 17:43 UTC (History)
2 users (show)

See Also:
i915 platform:
i915 features:

xorg conf (3.30 KB, text/plain)
2007-12-06 01:25 UTC, Shuang He
no flags Details
xorg log (21.00 KB, text/plain)
2007-12-06 01:27 UTC, Shuang He
no flags Details

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Description Shuang He 2007-12-06 01:22:46 UTC
System Environment:



--2D driver: 75ef3e669dac1259d282dcc8f54b197fc19f22b3 

--Mesa: 3a90679400e50fb5d319deee51e03a298735aa17 

--DRM: 690dd04d1b9a4da92139793d3f5129a80f9c7353

--Xserver: aec0d06469a2fa7440fdd5ee03dc256a68704e77 


Bug detailed description:
startx normally, then run compiz will cause X crashed, we get backtrace as following:

(gdb) bt
#0  0x0000003fbde305b5 in raise () from /lib64/libc.so.6
#1  0x0000003fbde32060 in abort () from /lib64/libc.so.6
#2  0x000000000045f633 in ddxGiveUp () at xf86Init.c:1290
#3  0x00000000004e5de8 in AbortServer () at log.c:406
#4  0x00000000004e63c5 in FatalError (
	f=0x55d3d0 "Caught signal %d.  Server aborting\n") at log.c:552
#5  0x0000000000476057 in xf86SigHandler (signo=11) at xf86Events.c:766
#6  <signal handler called>
#7  glxFillAlphaChannel (pixmap=<value optimized out>,
	x=<value optimized out>, y=0, width=<value optimized out>, height=25)
	at glxdri.c:322
#8  0x00002b1a2382694b in __glXDRIbindTexImage (
	baseContext=<value optimized out>, buffer=<value optimized out>,
	glxPixmap=0xb65900) at glxdri.c:439
#9  0x00002b1a237f54ac in __glXDisp_BindTexImageEXT (cl=<value optimized out>,
	pc=<value optimized out>) at glxcmds.c:1530
#10 0x00002b1a237f4282 in __glXDisp_VendorPrivate (cl=0xb55608,
	pc=<value optimized out>) at glxcmds.c:2245
#11 0x00002b1a237f8132 in __glXDispatch (client=0xb55410) at glxext.c:493
#12 0x0000000000447410 in Dispatch () at dispatch.c:502
#13 0x000000000042fa3a in main (argc=4, argv=0x7fff8834cbb8,
	envp=<value optimized out>) at main.c:454

Reproduce steps:
1. startx
2. run "compiz --replace"

Current result:
X crashed

Expected result:
compiz runs normally
Comment 1 Shuang He 2007-12-06 01:25:25 UTC
Created attachment 12974 [details]
xorg conf
Comment 2 Shuang He 2007-12-06 01:27:04 UTC
Created attachment 12975 [details]
xorg log
Comment 3 Michel Dänzer 2007-12-06 01:59:05 UTC
While this is triggered by EXA always hiding the pixmap data outside of Prepare/FinishAccess now, using pPixmap->devPrivate.ptr directly was never a very good idea. __glXDRIbindTexImage should be fixed to obtain the pixmap data with pScreen->GetImage and pass the result to glxFillAlphaChannel and glTex(Sub)Image2D. (Doing so might even make compiz usable with XAA without Option "XaaNoOffscreenPixmaps"...)

Any takers?

P.S. Implementing the DRI_TexOffset extension in the Mesa i965 driver should avoid this problem and improve performance with compiz.
Comment 4 Jesse Barnes 2007-12-06 12:23:52 UTC
Is this the same as 13507?
Comment 5 Shuang He 2007-12-06 16:59:18 UTC
(In reply to comment #4)
> Is this the same as 13507?

No, I don't think so.
Comment 6 Eamon Walsh 2007-12-13 20:54:38 UTC
This is hitting me as well on current master.  Same stacktrace, confirm that pPixmap->devPrivate.ptr is zero going into glxFillAlphaChannel.  Can trigger the crash with glxgears.
Comment 8 Shuang He 2008-01-30 17:43:59 UTC
verified on 945GM and 915GV

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