Description of problem: Version-Release number of selected component: firefox-26.0-3.fc20 Additional info: reporter: libreport-2.1.11 backtrace_rating: 4 cmdline: /usr/lib64/firefox/firefox crash_function: xcb_glx_query_server_string_string_length executable: /usr/lib64/firefox/firefox kernel: 3.12.7-300.fc20.x86_64 runlevel: N 5 type: CCpp uid: 1000 Truncated backtrace: Thread no. 1 (10 frames) #0 xcb_glx_query_server_string_string_length at glx.c:2448 #1 __glXQueryServerString at glx_query.c:55 #2 AllocAndFetchScreenConfigs at glxext.c:764 #3 __glXInitialize at glxext.c:879 #4 GetGLXPrivScreenConfig at glxcmds.c:174 #6 glXChooseVisual at glxcmds.c:1251 #7 glxtest at /usr/src/debug/xulrunner-26.0/mozilla-release/toolkit/xre/glxtest.cpp:159 #8 fire_glxtest_process at /usr/src/debug/xulrunner-26.0/mozilla-release/toolkit/xre/glxtest.cpp:234 #9 XREMain::XRE_mainInit at /usr/src/debug/xulrunner-26.0/mozilla-release/toolkit/xre/nsAppRunner.cpp:2834 #10 XREMain::XRE_main at /usr/src/debug/xulrunner-26.0/mozilla-release/toolkit/xre/nsAppRunner.cpp:3917 Potential duplicate: bug 921989
Created attachment 850493 [details] File: backtrace
Created attachment 850494 [details] File: cgroup
Created attachment 850495 [details] File: core_backtrace
Created attachment 850496 [details] File: dso_list
Created attachment 850497 [details] File: environ
Created attachment 850499 [details] File: exploitable
Created attachment 850500 [details] File: limits
Created attachment 850501 [details] File: maps
Created attachment 850502 [details] File: open_fds
Created attachment 850503 [details] File: proc_pid_status
Created attachment 850504 [details] File: var_log_messages
This one comes from Mesa OpenGL implementation. If you see it regularly you may disable WebGL support. Or do you have OepnGL layers rendering enabled?
problem found : previous install of AMD / ATI proprietary fglrx drivers overwrote some libs. yum -y reinstall mesa* xorg-x11* corrected the problem. closing.