The problem reoccurred while running what was the most recent mainline kernel when I downloaded it (v4.13/ 2017-09-03 22:30). The log file is attached.
Thanks for your help, jsalisbury. ** Attachment added: "Kernel Log of Latest Crash" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1707695/+attachment/4952992/+files/kern.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1707695 Title: radeon 0000:03:00.0: ring 0 stalled for more than 10000msec To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1707695/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs