Created attachment 776146 [details] Patch to fix the segfault. This is related to bug #976995 (closed). I prefer to open a new bug report for more clarity. The command "Xephyr -ac -br :4" lead to a segfault: (EE) (EE) Backtrace: (EE) 0: /usr/bin/Xephyr (OsSigHandler+0x29) [0x467a49] (EE) 1: /lib64/libpthread.so.0 (__restore_rt+0x0) [0x37a8c0ef9f] (EE) 2: /usr/bin/Xephyr (ephyrHostXVAdaptorGetVideoFormats+0xba) [0x47785a] (EE) 3: /usr/bin/Xephyr (ephyrInitVideo+0x707) [0x476b37] (EE) 4: /usr/bin/Xephyr (ephyrInitScreen+0xd8) [0x4722a8] (EE) 5: /usr/bin/Xephyr (KdScreenInit+0x217) [0x48e2b7] (EE) 6: /usr/bin/Xephyr (AddScreen+0x71) [0x42ff31] (EE) 7: /usr/bin/Xephyr (KdInitOutput+0x289) [0x48e799] (EE) 8: /usr/bin/Xephyr (main+0x1db) [0x41e80b] (EE) 9: /lib64/libc.so.6 (__libc_start_main+0xf5) [0x37a8821b75] (EE) 10: /usr/bin/Xephyr (_start+0x29) [0x41ed41] (EE) 11: ? (?+0x29) [0x29] (EE) (EE) Segmentation fault at address 0x18 (EE) Fatal server error: (EE) Caught signal 11 (Segmentation fault). Server aborting (EE) This bug happens on the main system (fresh FC19 install). I cannot reproduce it on vitual systems. It did not happened on FC17. This is due to the function 'XGetVisualInfo' returning a NULL pointer. Here a patch to fix it. Version: xorg-x11-server-Xephyr-1.14.2-5
Hi, Alphonse Steiner, are you the author of the patch to fix the segfault ? if yes , is patch posted to the xorg-devel mailing list, to be merged on git master ?
Yes I am. I have not posted this patch elsewhere than this bugzilla.
hi, sorry for late response , I talked about this patch on xorg devel Mailing list [1] You may wrote there and try submit the patch, in proper way and sign off it ... I'm trying to help you, and thinking about this bug you wrote: > This is due to the function 'XGetVisualInfo' returning a NULL pointer. if XGetVisualInfo return NULL something is bad configured in your system, I think, I can't reproduce this bug. $ LIBGL_DEBUG=verbose glxinfo what is the output ? [1] http://lists.x.org/archives/xorg-devel/2013-July/036960.html
First of all, thank you very much for your consideration. I really do appreciate it. After a reboot on a new kernel, with new drivers and a few more updates, the segfault does not appear anymore. I do not know what is 'the' update that has fixed it. Maybe the intel driver? Anyway, it is fixed now. Thanks again.