Comment 43 for bug 1751268

ok, all's not wine and roses. When exiting X, it goes into the same style lockup as used to happen on boot. Which includes crashing so hard that often times (but not all the time) the BIOS can't find the boot disk after the next power cycle.

At least the bug moving further back in the chain means I can do some work, and investigate a running system. Thank goodness I didn't uninstall the (still happily working) kernel-4.14.18-300.fc27.x86_64