This line in /etc/fstab is the problem. Once I remove it, chromium starts up and works just fine.
none /dev/shm tmpfs nosuid,nodev 0 0 -- /dev/shm isn't writable, causing problems with glibc 2.2+ apps such as chromium https://bugs.launchpad.net/bugs/566788 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