xorg crashes - Fatal Server Error in ProcPolyPoint

[Mac]

New computer core 2 duo, nvidia 8400GS card (DVI+VGA).

Using two screens, with Compiz.

Machine has been up 3 days (Hardy was it's first and only OS), and has xorg crashed 6 times so far.

No pattern to the crashes, but have all been while computer was in active use.

Will try turning off 3d.

Using the most recent Hardy Heron.
desktop:/var/log$ lsb_release -rd
Description: Ubuntu 8.04
Release: 8.04

desktop:/var/log$ apt-cache policy xorg
xorg:
  Installed: 1:7.3+10ubuntu10
  Candidate: 1:7.3+10ubuntu10
  Version table:
 *** 1:7.3+10ubuntu10 0
        500 http://nz.archive.ubuntu.com hardy/main Packages
        100 /var/lib/dpkg/status

...
(II) evaluating device (Configured Mouse)
(II) XINPUT: Adding extended input device "Configured Mouse" (type: MOUSE)
(--) Configured Mouse: PnP-detected protocol: "ExplorerPS/2"
(II) Configured Mouse: ps2EnableDataReporting: succeeded
SetClientVersion: 0 9

Backtrace:
0: /usr/bin/X(xf86SigHandler+0x7e) [0x80c780e]
1: [0xb7f96420]
2: /usr/bin/X(ProcPolyPoint+0x14a) [0x808aa9a]
3: /usr/bin/X [0x815075e]
4: /usr/bin/X(Dispatch+0x2cf) [0x808d8df]
5: /usr/bin/X(main+0x48b) [0x807471b]
6: /lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe0) [0xb7d2c450]
7: /usr/bin/X(FontFileCompleteXLFD+0x201) [0x8073a91]

Fatal server error:
Caught signal 11. Server aborting

[Bryce Harrington (bryce)]

Hi Mac,

Please collect a full backtrace from the crash - see http://wiki.ubuntu.com/X/Backtracing for directions on how to do this.

[Meekohi (meekohi)]

I have the same bug.
Core 2 Duo
Dual nVidia Quadro 570's
Quad-monitor (dual twinview) with compiz
This bug is completely repeatable for me, everytime I run qGo and try to observe a new game Xorg crashes immediately.

Full backtrace:
(gdb) backtrace full
#0 0xb6edc51f in _nv000737X ()
   from /usr/lib/xorg/modules/drivers//nvidia_drv.so
No symbol table info available.
#1 0x081daf84 in ?? ()
No symbol table info available.
#2 0x0808aa9a in ProcPolyPoint (client=0x857f3e8) at ../../dix/dispatch.c:1883
 pGC = (GC *) 0x84f0878
 pDraw = (DrawablePtr) 0x857f3e8
#3 0x0815076e in XaceCatchDispatchProc (client=0x8463410)
    at ../../Xext/xace.c:281
 major = 64
#4 0x0808d8df in Dispatch () at ../../dix/dispatch.c:502
 result = <value optimized out>
 client = (ClientPtr) 0x8463410
 nready = 0
 start_tick = 1440
#5 0x0807471b in main (argc=10, argv=0xbf86a024, envp=0x0)
    at ../../dix/main.c:452
 i = 2
 error = 136163204
 xauthfile = <value optimized out>
 alwaysCheckForInput = {0, 1}
(gdb)

[Alberto Milone (albertomilone)]

Can you try this and see if it solves the problem?

Add the following section to your xorg.conf (if such section is already available, just change the option to "Disable"):

Section "Extensions"
    Option "Composite" "Disable"
EndSection

[Meekohi (meekohi)]

That fixed the problem! Any further information on what "Composite" is and why it breaks qGo?

[Alberto Milone (albertomilone)]

I have noticed this problem with Quadro cards. It looks like the UBB (unified back buffer) of Quadro cards conflicts with the Composite extension.

[amfi (amfi1)]

I also have the same problem, I use Kubuntu 8.04 on Core2Duo E7200, GeForce 7300GT. The crash happens from time to time (at least once a day), in various circumstances - I can't find any rule for this.

Backtrace:
0: /usr/bin/X(xf86SigHandler+0x7e) [0x80c780e]
1: [0xb7ef1420]
2: /usr/bin/X(ProcPolyPoint+0x14a) [0x808aa9a]
3: /usr/bin/X [0x815076e]
4: /usr/bin/X(Dispatch+0x2cf) [0x808d8df]
5: /usr/bin/X(main+0x48b) [0x807471b]
6: /lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe0) [0xb7c82450]
7: /usr/bin/X(FontFileCompleteXLFD+0x201) [0x8073a91]

Fatal server error:
Caught signal 11. Server aborting