I don't think it is a duplicate. I've never had the crash occur while browsing (though firefox is always open) and don't see a firefox core dump or anything like that. I have intel hardware, not ATI. However, I also cannot find a specific trigger, and it does look like it may be caused by erroneous handling of a null pointer. Uploading the full logfiles from each crash is kinda hopeless as they grow to be rather large. I collect several files after each crash to examine, and the folder of those files is about 700MiB per crash. Unfortunately, I cannot trigger the crash, so getting a full gdb backtrace is going to be difficult.
The backtrace I am finding in my Xorg.failsafe.log is: (EE) FBDEV(0): FBIOPUTCMAP: Invalid argument <repeated thousands of times> (==) FBDEV(0): DPMS enabled (==) RandR enabled <snip> Backtrace: 0: /usr/bin/X (xorg_backtrace+0x28) [0x4a3248] 1: /usr/bin/X (0x400000+0x655ad) [0x4655ad] 2: /lib/libpthread.so.0 (0x7fd31e800000+0xf8f0) [0x7fd31e80f8f0] 3: /usr/bin/X (DamageUnregister+0x53) [0x4d72f3] 4: /usr/lib/xorg/modules/libshadow.so (shadowRemove+0x33) [0x7fd31b1303c3] 5: /usr/lib/xorg/modules/libshadow.so (0x7fd31b12f000+0x1884) [0x7fd31b130884] 6: /usr/bin/X (0x400000+0xa77d9) [0x4a77d9] 7: /usr/bin/X (0x400000+0x16852c) [0x56852c] 8: /usr/bin/X (0x400000+0x2624c) [0x42624c] 9: /lib/libc.so.6 (__libc_start_main+0xfd) [0x7fd31d4f8c4d] 10: /usr/bin/X (0x400000+0x25d59) [0x425d59] Segmentation fault at address (nil) The kdm log gives this: (note that 'batch' is found once in the file while the others are repeated): ../../intel/intel_bufmgr_gem.c:957: Error mapping buffer 36087 (pixmap): Cannot allocate memory . ../../intel/intel_bufmgr_gem.c:876: Error mapping buffer 15600 (surface_state): Cannot allocate memory . ../../intel/intel_bufmgr_gem.c:876: Error mapping buffer 15615 (binding_table): Cannot allocate memory . <repeated hundreds of times, number after 'buffer' varies> ../../intel/intel_bufmgr_gem.c:876: Error mapping buffer 16230 (surface_state): Cannot allocate memory . ../../intel/intel_bufmgr_gem.c:876: Error mapping buffer 15863 (binding_table): Cannot allocate memory . ../../intel/intel_bufmgr_gem.c:876: Error mapping buffer 15672 (surface_state): Cannot allocate memory . ../../intel/intel_bufmgr_gem.c:876: Error mapping buffer 16084 (binding_table): Cannot allocate memory . ../../intel/intel_bufmgr_gem.c:876: Error mapping buffer 15820 (binding_table): Cannot allocate memory . ../../intel/intel_bufmgr_gem.c:876: Error mapping buffer 15950 (binding_table): Cannot allocate memory . ../../intel/intel_bufmgr_gem.c:876: Error mapping buffer 36091 (batch): Cannot allocate memory . Fatal server error: Failed to map batchbuffer: Cannot allocate memory And Xorg.0.log yields: (WW) intel(0): i830_uxa_prepare_access: bo map failed (WW) intel(0): i830_uxa_prepare_access: bo map failed <repeated thousands of times> Fatal server error: Failed to map batchbuffer: Cannot allocate memory -- X server crashes randomly https://bugs.launchpad.net/bugs/573957 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs