Bug 299771 – xorg-server segfaults when using xinerama

• Status: RESOLVED CANTFIX
• Product: Gentoo Linux

[Description Richard Connon 2010-01-05 14:32:44 UTC]

With my xinerama setup xorg-server-1.7.3.902 I get a segfault when I move the mouse to the left of the main screen.
I'm not sure what information is needed to diagnose this issue so please ask for what is relevant.

Reproducible: Always

Steps to Reproduce:

[Comment 1 Rémi Cardona (RETIRED) 2010-01-12 17:04:00 UTC]

Without any backtraces, that's going to be hard to fix. Please read this guide [1] and try to get a proper backtrace out of Xorg. Those will be available in /var/log/Xorg.0.log.

Once you get a nice backtrace, please attach the full log here.

Thanks

[Comment 2 Rémi Cardona (RETIRED) 2010-01-12 17:04:21 UTC]

[1] http://www.gentoo.org/proj/en/qa/backtraces.xml

[Comment 3 Richard Connon 2010-01-12 17:13:46 UTC]

I'll do that ASAP. Probably tomorrow.

[Comment 4 Richard Connon 2010-01-13 19:47:22 UTC]

Program received signal SIGSEGV, Segmentation fault.
miDCSaveUnderCursor (pDev=0x26877c0, pScreen=0x2388d50, x=<value optimized out>, y=<value optimized out>, w=26, h=32) at midispcur.c:536
536	midispcur.c: No such file or directory.
	in midispcur.c
(gdb) bt
#0  miDCSaveUnderCursor (pDev=0x26877c0, pScreen=0x2388d50, x=<value optimized out>, y=<value optimized out>, w=26, h=32) at midispcur.c:536
#1  0x00000000005529e5 in miSpriteSaveUnderCursor (pDev=0x26877c0, pScreen=0x2388d50) at misprite.c:1039
#2  0x0000000000552c97 in miSpriteSetCursor (pDev=0x26877c0, pScreen=0x2388d50, pCursor=0x26eee00, x=<value optimized out>, 
    y=<value optimized out>) at misprite.c:902
#3  0x0000000000456d9b in miPointerUpdateSprite (pDev=0x26877c0) at mipointer.c:402
#4  0x0000000000456ed3 in miPointerSetCursorPosition (pDev=0x26877c0, pScreen=0x2388d50, x=0, y=0, generateEvent=0) at mipointer.c:241
#5  0x00000000004b06ef in AnimCurSetCursorPosition (pDev=0x26877c0, pScreen=0x2388d50, x=0, y=0, generateEvent=<value optimized out>)
    at animcur.c:266
#6  0x00000000004586bf in mieqProcessDeviceEvent (dev=0x26877c0, event=0x2844c20, screen=0x2388d50) at mieq.c:388
#7  0x000000000045876a in mieqProcessInputEvents () at mieq.c:471
#8  0x0000000000467a38 in ProcessInputEvents () at xf86Events.c:165
#9  0x000000000044d99a in Dispatch () at dispatch.c:371
#10 0x0000000000424f4a in main (argc=3, argv=0x7bc3a0, envp=<value optimized out>) at main.c:285

[Comment 5 Richard Connon 2010-01-13 19:51:00 UTC]

If there's information missing (the optimised out stuff) let me know. I can recompile without optimisation.

For reference that was done with -ggdb in CFLAGS and splitdebug in features.

[Comment 6 Rémi Cardona (RETIRED) 2010-01-19 21:14:29 UTC]

Please attach your Xorg.0.log from after the crash.

Thanks

[Comment 7 Richard Connon 2010-01-19 21:18:03 UTC]

I can no longer reproduce this since I've changed hardware (different GPU)
I now have X just not start if I turn Xinerama.
Should I attach the Xorg.0.log or should I start a new bug?

[Comment 8 Rémi Cardona (RETIRED) 2010-01-19 21:21:31 UTC]

Yes, please file a new bug. Don't forget to attach your Xorg.0.log.

Thanks