X segfaults starting video on Intel 915GM

[Ken Mandelberg]

My X server periodically segfaults starting a video (myth, xine, etc). 
Its not any particular video, often I run the one that triggered the 
segfault after restarting the X server and it runs fine.

The log shows

Backtrace:
0: /usr/bin/X(xf86SigHandler+0x7e) [0x80c780e]
1: [0xb7ee8420]
2: /usr/bin/X [0x80da805]
3: /usr/lib/xorg/modules/extensions//libextmod.so(XvdiPutImage+0x178) 
[0xb7b50608]
4: /usr/lib/xorg/modules/extensions//libextmod.so [0xb7b53476]
5: /usr/bin/X [0x81506de]
6: /usr/bin/X(Dispatch+0x2cf) [0x808d8df]
7: /usr/bin/X(main+0x48b) [0x807471b]
8: /lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe0) [0xb7c79450]
9: /usr/bin/X(FontFileCompleteXLFD+0x201) [0x8073a91]


Any ideas, I'm running the standard X server and modules on Ubuntu 8.04.

X.Org X Server 1.4.0.90
Release Date: 5 September 2007
X Protocol Version 11, Revision 0
Build Operating System: Linux Ubuntu (xorg-server 
2:1.4.1~git20080131-1ubuntu9.1)
..
(II) intel: Driver for Intel Integrated Graphics Chipsets: i810,
         i810-dc100, i810e, i815, i830M, 845G, 852GM/855GM, 865G, 915G,
         E7221 (i915), 915GM, 945G, 945GM, 945GME, 965G, G35, 965Q, 946GZ,
         965GM, 965GME/GLE, G33, Q35, Q33, Intel Integrated Graphics Device
(II) Primary Device is: PCI 00:02:0
(WW) intel: No matching Device section for instance (BusID PCI:0:2:1) found
(--) Chipset 915GM found
....