Christopher, I am currently running Ubuntu 17.10 64 bit, Mate 1.18.0, kernel 4.13.0-30-generic X86_64. I have not seen this problem for a long time and it's so long ago now I'm afraid that I don't recall whether it occurred after an update. I have attached current Xorg log.
I am also running Ubuntu 18.04 in Vbox and not seeing the issue. Sorry I can't be of more help but can upload more current logs if of any use. ** Attachment added: "Xorg0_log.txt" https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1704660/+attachment/5056567/+files/Xorg0_log.txt -- 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/1704660 Title: Xorg freeze To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1704660/+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

