It appears this crash might be one of the two top crashes (which look like they might be the same one crash):
https://errors.ubuntu.com/problem/97011086e8272197873e57cacbf4e75b9723824f https://errors.ubuntu.com/problem/32ef08d11dc442f40fddf95eb9a987d2dd02425a ** Summary changed: - gnome-session-check-accelerated crashed with SIGSEGV + gnome-session-check-accelerated crashed with SIGSEGV in g_hash_table_lookup_node() ** Tags added: bionic ** Description changed: + Possibly: + https://errors.ubuntu.com/problem/97011086e8272197873e57cacbf4e75b9723824f + https://errors.ubuntu.com/problem/32ef08d11dc442f40fddf95eb9a987d2dd02425a + + --- + bug at login ProblemType: Crash DistroRelease: Ubuntu 17.10 Package: gnome-session-bin 3.25.90-0ubuntu2 Uname: Linux 4.12.0-041200-generic x86_64 ApportVersion: 2.20.7-0ubuntu1 Architecture: amd64 CurrentDesktop: GNOME-Greeter:GNOME Date: Sun Sep 3 09:34:09 2017 Disassembly: => 0x0: Cannot access memory at address 0x0 ExecutablePath: /usr/lib/gnome-session/gnome-session-check-accelerated InstallationDate: Installed on 2015-04-16 (874 days ago) InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1) ProcCmdline: /usr/lib/gnome-session/gnome-session-check-accelerated SegvAnalysis: - Segfault happened at: 0x0: Cannot access memory at address 0x0 - PC (0x00000000) not located in a known VMA region (needed executable region)! + Segfault happened at: 0x0: Cannot access memory at address 0x0 + PC (0x00000000) not located in a known VMA region (needed executable region)! SegvReason: executing NULL VMA Signal: 11 SourcePackage: gnome-session StacktraceTop: - () - g_hash_table_lookup () at /lib/x86_64-linux-gnu/libglib-2.0.so.0 - gdk_x11_atom_to_xatom_for_display () at /usr/lib/x86_64-linux-gnu/libgdk-3.so.0 - () - __libc_start_main (main=0x55f3e2ce4200, argc=1, argv=0x7ffcebd38af8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffcebd38ae8) at ../csu/libc-start.c:291 + () + g_hash_table_lookup () at /lib/x86_64-linux-gnu/libglib-2.0.so.0 + gdk_x11_atom_to_xatom_for_display () at /usr/lib/x86_64-linux-gnu/libgdk-3.so.0 + () + __libc_start_main (main=0x55f3e2ce4200, argc=1, argv=0x7ffcebd38af8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffcebd38ae8) at ../csu/libc-start.c:291 Title: gnome-session-check-accelerated crashed with SIGSEGV UpgradeStatus: Upgraded to artful on 2017-08-25 (11 days ago) UserGroups: -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1715365 Title: gnome-session-check-accelerated crashed with SIGSEGV in g_hash_table_lookup_node() To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-session/+bug/1715365/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs