Created attachment 18672 [details] Backtrace from the crash xubuntu 8.04 and wine 0.9.59-0ubuntu5 crashs the xserver, Xorg Program received signal SIGSEGV, Segmentation fault. bofh@xbox:# wine preloader: Warning: failed to reserve range 00000000-60000000 preloader: Warning: failed to reserve range 00000000-60000000 err:dosmem:setup_dos_mem Cannot use first megabyte for DOS address space, please report preloader: Warning: failed to reserve range 00000000-60000000 err:dosmem:setup_dos_mem Cannot use first megabyte for DOS address space, please report err:dosmem:setup_dos_mem Cannot use first megabyte for DOS address space, please report XIO: fatal IO error 11 (Resource temporarily unavailable) on X server ":0.0" after 76 requests (74 known processed) with 0 events remaining. See also the attached backtrace. The fault seems to be related to this: pScrn = xf86Screens[scrnIndex]; // does bad data get in here? pVidMode = VMPTR(pScrn->pScreen); pVidMode->First = pScrn->modes; // First set to Invalid pointer? pVidMode->Next = pVidMode->First->next; // Crash A guess is that adding a check for pVidMode->First would eliminate the crash.
I'm running into this, too. In my case, it's with Ubuntu 8.10, with its stock X server 1.5.2, on an intel graphics card. To reproduce, run any Wine program that uses the screen (say, wine-git/dlls/user32/tests's "make static.ok") with the monitor unplugged. 100% reproducible crash, backtrace points to exactly this problem; perhaps VidModeAvailable needs to do the additional checking Andreas Moog suggested. Seems to be a dup of bug 13952?
I'm getting this with an nvidia card now, too, so it's generic, not video-card specific. The "Ubuntu is running in low-graphics mode" says (EE) NV(0): No valid initial configuration found Foo. Now I have to go buy monitors for all my build slaves. This can't be optimal.
I'm also having this problem as soon as an SDL program starts up when it inquiries VidModes, this is on radeon driver.
For what it's worth, it seems like SDL comes with its own internal copy of Xxf86vm ... which I guess is not very good... there is where the XF86VidModeGetAllModeLines symbol is present. I guess ABI might have changed somehow, and SDL now makes Xorg crash.
*** Bug 13952 has been marked as a duplicate of this bug. ***
*** Bug 27758 has been marked as a duplicate of this bug. ***
Created attachment 42358 [details] [review] Prevent the crash
Chris, please send this workaround (along with your others) to xorg-devel for review.
reviewed and pulled into my tree for eventual merge to master. In the future, please send to xorg-devel.
commit 6105fcaa3592cb6d0d5f22d9b850986d0bc4d241 Author: Chris Wilson <chris@chris-wilson.co.uk> Date: Mon Jan 24 11:17:03 2011 +0000 VidMode: prevent crash with no modes Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=17431 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Jeremy Huddleston <jeremyhu@apple.com> (cherry picked from commit eeb21a133b982f71de739baf62e53c8a68f5d495)
Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.