I'll try that BIOS test. In the meantime I thought I'd try again nVidia proprietary driver.
Installation of package was requested through Ubuntu driver selection GUI. Resulted in 2 new bugs automatically notified and reported: https://bugs.launchpad.net/ubuntu/+source/bbswitch/+bug/1552108 https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-352/+bug/1552109 Have not rebooted yet. Thank you for your attention. -- 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/1547077 Title: Some glyphs drawn consistently wrong, bug comes and go To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1547077/+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