Date: Fri, 14 Oct 2011 13:07:44 +0100 From: "Richard M. Timoney" <richardt@maths.tcd.ie> To: x11@FreeBSD.org Subject: Bug possibly in xf86-video-intel Message-ID: <20111014120744.GA85747@bloch.maths.tcd.ie>
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Dear x11,
I have both FreeBSD 8.2 64 bit and FreeBSD 7.4 386 systems that reliably
crash X under the following action
Action: remote access X on a Debian 64 bit system. Attempt to open iceweasel.
It can do this with ssh -Y from a desktop on ym amd64 system, or by
remote login from kdm on either system
Both systems have intel cards (one much older than the other).
FreeBSD bloch.maths.tcd.ie 8.2-STABLE FreeBSD 8.2-STABLE #11: Tue Oct
4 22:45:41 IST 2011
richardt@bloch.maths.tcd.ie:/bloch/obj/usr/src/sys/GENERIC amd64
(--) PCI:*(0:0:2:0) 8086:2e12:1028:0276 Intel Corporation 4 Series
Chipset Integrated Graphics Controller rev 3, Mem @
0xfe800000/4194304, 0xd0000000/268435456, I/O @ 0x0000ec90/8, BIOS @
0x????????/65536
(--) PCI: (0:0:2:1) 8086:2e13:1028:0276 Intel Corporation 4 Series
Chipset Integrated Graphics Controller rev 3, Mem @
0xfe700000/1048576
(II) intel(0): Integrated Graphics Chipset: Intel(R) Q45/Q43
(--) intel(0): Chipset: "Q45/Q43"
(--) intel(0): Linear framebuffer at 0xD0000000
(--) intel(0): IO registers at addr 0xFE800000
(==) intel(0): Using EXA for acceleration
Diagnosis attempts:
==================
I build X and the intel driver
xorg-server-1.7.7_2,1
xf86-video-intel-2.7.1_4
with debugging on and ran with gdb to get this output
Program received signal SIGSEGV, Segmentation fault.
0x000000080280c0a0 in i830_get_pixmap_bo (pixmap=0x0) at i830_exa.c:784
784 ScreenPtr screen = pixmap->drawable.pScreen;
(gdb) bt
#0 0x000000080280c0a0 in i830_get_pixmap_bo (pixmap=0x0) at i830_exa.c:784
#1 0x0000000802816a14 in i965_set_picture_surface_state (ss_bo=0x818136f40,
ss_index=1, pPicture=0x818136e80, pPixmap=0x0, is_dst=0)
at i965_render.c:927
#2 0x0000000802817ef2 in i965_prepare_composite (op=3,
pSrcPicture=0x818136e80, pMaskPicture=0x0, pDstPicture=0x818134e40,
pSrc=0x0, pMask=0x0, pDst=0x818165000) at i965_render.c:1301
#3 0x000000080312d55d in exaTryDriverComposite ()
from /usr/local/lib/xorg/modules/libexa.so
#4 0x000000080312e205 in exaComposite ()
from /usr/local/lib/xorg/modules/libexa.so
#5 0x000000000053583c in damageComposite (op=3 '\003', pSrc=0x818136e80,
pMask=0x0, pDst=0x818134e40, xSrc=0, ySrc=48, xMask=0, yMask=0, xDst=0,
yDst=48, width=994, height=34) at damage.c:643
#6 0x00000000005252a5 in CompositePicture (op=3 '\003', pSrc=0x818136e80,
pMask=0x0, pDst=0x818134e40, xSrc=0, ySrc=48, xMask=0, yMask=0, xDst=0,
yDst=48, width=994, height=34) at picture.c:1718
#7 0x000000000052781b in ProcRenderComposite (client=0x801e2f580)
at render.c:723
#8 0x000000000052b772 in ProcRenderDispatch (client=0x801e2f580)
at render.c:2056
#9 0x00000000004353dc in Dispatch () at dispatch.c:439
#10 0x000000000042dace in main (argc=7, argv=0x7fffffffe850,
---Type <return> to continue, or q <return> to quit---
envp=0x7fffffffe890) at main.c:285
I assume that the problem is that the pointer is 0 and
ScreenPtr screen = pixmap->drawable.pScreen;
is then an invalid instruction.
I don't know what else is wrong to get to this stage.
Yours,
Richard Timoney
--
Richard M. Timoney
(richardt@maths.tcd.ie) Tel. +353-1-896 1196
School of Mathematics, Trinity College, Dublin 2, Ireland
WWW http://www.maths.tcd.ie/~richardt FAX +353-1-896 2282
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