This looks like bug 982889, but that was fixed in 2013. Still, since this is the only remaining instance of this bug I have heard of I would recommend upgrading to Ubuntu 18.04. It is also a long term support release and if you find gnome-shell is not well suited to this machine then you can still reinstall Unity (unity-session package).
** Summary changed: - Graphics warning on restart + Xorg repeatedly fails to start [Cannot run in framebuffer mode. Please specify busIDs for all framebuffer devices] -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1849545 Title: Xorg repeatedly fails to start [Cannot run in framebuffer mode. Please specify busIDs for all framebuffer devices] To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1849545/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : [email protected] Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
