Ah! It appears that Google have changed their packaging subtly, which has made the original patch ineffective.
Among other things, the original patch added the following lines to "/etc/apparmor.d/abstractions/lightdm_chromium-browser": /opt/google/chrome-stable/google-chrome-stable Cx -> chromium, /opt/google/chrome-beta/google-chrome-beta Cx -> chromium, /opt/google/chrome-unstable/google-chrome-unstable Cx -> chromium, At least in the version of chrome I have installed (google-chrome-stable 36.0.1985.143-1, from the repository at http://dl.google.com/linux/chrome/deb/), the binary is installed to "/opt/google/chrome/google-chrome". Adding the following additional line caused the browser to work in guest mode for me: /opt/google/chrome/google-chrome Cx -> chromium, -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1298021 Title: Google Chrome (not chromium) won't start in guest session To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1298021/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
