<div class="gmail_quote">On Wed, Aug 31, 2011 at 23:33, Marc MERLIN <<a href="mailto:marc_xorg@merlins.org">marc_xorg@merlins.org</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"> I sure can, but I'm confused, doesn't the X log already contain a backtrace that I already pasted? Will gdb bt give a different backtrace that what I already posted? </blockquote><div> It would say in which source files and functions, and at what line of code the issue happened, and possibly why it happened. E.g., instead of [244312.106] 0: /usr/bin/X (xorg_backtrace+0x3b) [0x80eab8b] [244312.106] 1: /usr/bin/X (0x8048000+0x5fb38) [0x80a7b38] [244312.106] 2: (vdso) (__kernel_rt_sigreturn+0x0) [0xffffe40c] [244312.106] 3: /usr/bin/X (ProcUngrabKeyboard+0x10f) [0x807e0bf] [244312.106] 4: /usr/bin/X (0x8048000+0x28167) [0x8070167] [244312.106] 5: /usr/bin/X (0x8048000+0x1a81c) [0x806281c] [244312.106] 6: /lib/i386-linux-gnu/libc.so.6 (__libc_start_main+0xe7) [0xb75c7e37] [244312.106] 7: /usr/bin/X (0x8048000+0x1a411) [0x8062411] [244312.107] Segmentation fault at address 0x36d it would say something like (just an example): Program received signal SIGSEGV, Segmentation fault. 0xb7a92524 in GXDisplayVideo (pScrni=0x828bd38, id=0xb7aa9490, offset=0x17, width=0x82a, height=0xe730, pitch=0xb7aa946c, x1=0x8289920, y1=0x0, x2=0x0, y2=0x0, dstBox=0x82ae680, src_w=0x82a, src_h=0xe794, drw_w=0x828, drw_h=0x8638) at amd_gx_video.c:849 </div></div> -- Eugeni Dodonov <a href="http://eugeni.dodonov.net/" target="_blank">http://eugeni.dodonov.net/</a>