<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - xorg-server segfault when radeon driver are activated" href="https://bugs.freedesktop.org/show_bug.cgi?id=85330#c12">Comment # 12</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - xorg-server segfault when radeon driver are activated" href="https://bugs.freedesktop.org/show_bug.cgi?id=85330">bug 85330</a> from <a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> Chris Wilson</a> <pre>The last backtrace doesn't match the one in the Xorg.0.log. If I had to guess I would say it is an older version of -intel - because it is hitting commit 07fe45b84bdf0d236a5bfdc433cc1a908e0c161b Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>> Date: Tue Sep 9 08:12:45 2014 +0100 sna/glyphs: Prevent NULL vfunc deref with glyphs Requires running a PRIME setup with Intel loaded as the secondary GPU and attempting to execute an empty glyph string. Signed-off-by: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>> Does that make sense? (Oh, that patch is only available in git). Could you try and get a 'bt full' for [ 175.807] (EE) intel(0): Failed to set backlight intel_backlight for output eDP1, disabling [ 175.807] (EE) [ 175.807] (EE) Backtrace: [ 175.841] (EE) 0: /usr/bin/Xorg.bin (xorg_backtrace+0x56) [0x593a46] [ 175.841] (EE) 1: /usr/bin/Xorg.bin (0x400000+0x197b99) [0x597b99] [ 175.841] (EE) 2: /usr/lib/libc.so.6 (0x7f8415a89000+0x339f0) [0x7f8415abc9f0] [ 175.841] (EE) 3: /usr/bin/Xorg.bin (RRDeleteOutputProperty+0x9) [0x4fce49] [ 175.841] (EE) 4: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f8410a66000+0x6410e) [0x7f8410aca10e] [ 175.841] (EE) 5: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f8410a66000+0x6431d) [0x7f8410aca31d] [ 175.841] (EE) 6: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f8410a66000+0x64961) [0x7f8410aca961] [ 175.841] (EE) 7: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f8410a66000+0x6688c) [0x7f8410acc88c] [ 175.841] (EE) 8: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f8410a66000+0x6e59e) [0x7f8410ad459e] [ 175.841] (EE) 9: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f8410a66000+0x6e778) [0x7f8410ad4778] [ 175.841] (EE) 10: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f8410a66000+0x70bce) [0x7f8410ad6bce] [ 175.841] (EE) 11: /usr/bin/Xorg.bin (0x400000+0xadae7) [0x4adae7] [ 175.841] (EE) 12: /usr/bin/Xorg.bin (0x400000+0x1148c2) [0x5148c2] [ 175.841] (EE) 13: /usr/bin/Xorg.bin (0x400000+0xcbc08) [0x4cbc08] [ 175.841] (EE) 14: /usr/bin/Xorg.bin (0x400000+0x112f6c) [0x512f6c] [ 175.841] (EE) 15: /usr/bin/Xorg.bin (0x400000+0x3b977) [0x43b977] [ 175.842] (EE) 16: /usr/lib/libc.so.6 (__libc_start_main+0xf0) [0x7f8415aa9040] [ 175.842] (EE) 17: /usr/bin/Xorg.bin (0x400000+0x25d0e) [0x425d0e] [ 175.842] (EE) [ 175.842] (EE) Segmentation fault at address 0x0</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>