2009/10/20 Renato Caldas <[email protected]>: > 2009/10/20 Renato Caldas <[email protected]>: >> Hello, >> >> Thanks for looking into this! >> >> 2009/10/20 Michel Dänzer <[email protected]>: >>> On Mon, 2009-10-12 at 20:12 +0100, Renato Caldas wrote: >>>> Hello, >>>> >>>> First of all, I'm not subscribed to this list, so please include my >>>> e-mail in the CC. >>>> >>>> When using (trying to use...), kicad I managed to get consistent Xorg >>>> segmentation faults. I've filed a bug report on fedora's bugzilla: >>>> https://bugzilla.redhat.com/show_bug.cgi?id=528475. There I've >>>> included a very basic test case that works all the time. In the >>>> meantime, I've also got my hands dirty, and tried to debug Xorg using >>>> gdb. >>>> >>>> The symptom is that the function fbBltOne is called with src=0x0, so >>>> Xorg segfaults as soon as it tries to use src (in LoadBits; at >>>> fb/fbbltone.c:292). >>>> >>>> I've traced its value back to fbPushPixels, where it is created and >>>> fed to the function chain, in the macro fbGetStipDrawable (defined at >>>> fb/fb.h:720). >>>> >>>> Here pDrawable->type seems to be DRAWABLE_PIXMAP, so _pPix is simply >>>> cast from pDrawable. Then the _pPix -> devPrivate.ptr is used as >>>> "src", after a couple of castings and copying around. >>> >>> Please provide a full backtrace ('bt full' in gdb) from when the crash >>> occurs. >> >> Attached. I've also attached it to the bug report, just in case. >> >>> If you're using EXA, the problem is most likely that some code path >>> isn't calling exaPrepareAccess(Reg) for the pixmap in question before >>> calling down to the fb module.
It seems that the code path is calling exaPrepareAccess: in ExaCheckPolyArc: (...) exaPrepareAccess (pDrawable, EXA_PREPARE_DEST); exaPrepareAccessGC (pGC); pGC->ops->PolyArc (pDrawable, pGC, narcs, pArcs); (...) but there's possibly something wrong there. Cheers, Renato >> I am using EXA. I'll try enabling XAA and report back. > > Nouveau doesn't support XAA, but I've disabled the acceleration. It > doesn't crash anymore, so you must be correct :) I'll try to figure > out a patch. > > Everything is slow now, but at least I can do some work. Thanks! > > Cheers, > Renato > >> Thanks, >> Renato >> > _______________________________________________ xorg-devel mailing list [email protected] http://lists.x.org/mailman/listinfo/xorg-devel
