Seems to have something to do with fglrx_drv. I guess more than two monitors pushes the envelope a bit.
Its beyond my skills to debug, but I can now replicate the bug. All I have to do is start acroread or gnumeric, and move it between screens. I'd be interested to know if this same thing kills your X. Acroread spouts a bunch of warnings when it starts, so I guess there is something unusual in the way it approaches the window manager. Since I stopped using those two, I have only had one crash. Cheers, Matt On 13/07/11 04:37, Justin Cherniak wrote: > I am also seeing this bug crop up for me. In my case, I have a 2-card, > 3-monitor system using xinerama. > > Here is the backtrace from an attached gdb session: > Program received signal SIGSEGV, Segmentation fault. > 0x00007fdc0ef5beff in ?? () from > /usr/lib/xorg/extra-modules/modules/drivers/fglrx_drv.so > (gdb) bt > #0 0x00007fdc0ef5beff in ?? () from > /usr/lib/xorg/extra-modules/modules/drivers/fglrx_drv.so > #1 0x00007fdc0ef5ba5d in ?? () from > /usr/lib/xorg/extra-modules/modules/drivers/fglrx_drv.so > #2 0x0000000000545212 in xf86RecolorCursor (pScreen=<value optimized out>, > pCurs=0x2ee7d10, > displayed=<value optimized out>) at > ../../../../hw/xfree86/ramdac/xf86HWCurs.c:225 > #3 0x0000000000545361 in xf86SetCursor (pScreen=0x26dc8b0, pCurs=0x2ee7d10, > x=<value optimized out>, > y=<value optimized out>) at > ../../../../hw/xfree86/ramdac/xf86HWCurs.c:150 > #4 0x0000000000543db8 in xf86CursorSetCursor (pDev=0x2ea9490, > pScreen=0x26dc8b0, pCurs=0x2ee7d10, x=5, > y=239) at ../../../../hw/xfree86/ramdac/xf86Cursor.c:350 > #5 0x000000000045b60c in miPointerUpdateSprite (pDev=0x2ea9490) at > ../../mi/mipointer.c:386 > #6 0x00000000004a2039 in mieqProcessInputEvents () at ../../mi/mieq.c:527 > #7 0x000000000046c709 in ProcessInputEvents () at > ../../../../hw/xfree86/common/xf86Events.c:165 > #8 0x000000000042e023 in Dispatch () at ../../dix/dispatch.c:363 > #9 0x0000000000421a7e in main (argc=8, argv=<value optimized out>, > envp=<value optimized out>) > at ../../dix/main.c:287 > > > ** Changed in: xorg-server (Ubuntu) > Status: New => Confirmed > -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/805346 Title: Xorg crashed with SIGSEGV. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/805346/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp