just an FYI. (I upgraded my main 16.04 LTS to 18.04 [July 6]) so this install was bumped to 18.10 and thus I can no longer do any testing on it.
More importantly though, I've not had the issue occur since (not once on 18.10), nor have I seen it on the now 18.04 LTS release-upgraded system (same hardware; just different partitions; ie. dual boot). (following command is for the 18.10 release-upgraded box) guiverc@d960-ubu2:~$ dpkg -l |grep 'caff\|light-lock' ii caffeine 2.9.4-1 all prevent the desktop becoming idle in full-screen mode rc light-locker 1.8.0-1ubuntu1 amd64 simple screen locker for lightDM display manager rc light-locker-settings 1.5.0-0ubuntu2 all simple configuration tool for light-locker -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1772542 Title: after waking from sleep i get text radeon error message then return login screen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1772542/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp