Created attachment 184071 [details] dmesg with timeout I've been testing the latest kernel to see if an issue with my wireless is fixed. Hardware is a Lenovo Thinkpad X1 Carbon 3rd Gen. Further hardware details available at the downstream wireless bug report [1]. [1] https://bugs.launchpad.net/bugs/1478754 cimes@lappy64-x1c:~$ lsb_release -rd Description: Ubuntu 15.04 Release: 15.04 cimes@lappy64-x1c:~$ uname -a Linux lappy64-x1c 4.2.0-040200rc4-generic #201507271733 SMP Mon Jul 27 21:35:06 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux System is now sometimes freezing up trying to open a new window during development testing of Mozilla's servo web browser engine. Output of dmesg captured from ssh session is attached (had to wait a few minutes for the timeout to show up). Here is the application backtrace as well as captured in gdb: #0 0x00007f837af3d0b7 in ioctl () at ../sysdeps/unix/syscall-template.S:81 #1 0x00007f8378a177e8 in drmIoctl () from /usr/lib/x86_64-linux-gnu/libdrm.so.2 #2 0x00007f837664de9c in drm_intel_gem_bo_start_gtt_access () from /usr/lib/x86_64-linux-gnu/libdrm_intel.so.1 #3 0x00005634d7de5183 in window::Window::new::haba041c2f46fbd05Rxa () #4 0x00005634d7cecb52 in main::h0c62f9eb269d2dd5raa () #5 0x00005634d9266ff9 in rust_try_inner () #6 0x00005634d9266fe6 in rust_try () #7 0x00005634d9263b79 in rt::lang_start::h6c59a9adbeceea29z5w () #8 0x00007f837ae60a40 in __libc_start_main (main=0x5634d7d4db90 <main>, argc=6, argv=0x7ffe6b853658, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffe6b853648) at libc-start.c:289 #9 0x00005634d7cec649 in _start ()
Presumed fixed upstream. If the problem persists with latest kernels, please file a bug at the freedesktop.org bugzilla [1], referencing this bug. Thank you. [1] https://bugs.freedesktop.org/enter_bug.cgi?product=DRI&component=DRM/Intel