kernel modeswitch fails on Fedora 27 on Evergreen (Radeon HD5850)
Submitted by Eric Smith
Assigned to Default DRI bug account
With Fedora 26 I had sporadic problems with the system crashing at the first kernel mode switch, before entering the LUKS passphrase at boot time, but I could hit reset and usually the second time it would work. With Fedora 27 this happens to me consistently every time. The only way I can successfully boot is to use "nomodeset" on the kernel command line, which then causes issues for my X session.
My system has Asus Sabertooth 990FX R2.0 motherboard, AMD FX-8350 CPU, and Radeon HD 5850 graphics card. I'm running Fedora 27 with kernel 4.15.3-300.fc27.x86_64.
Fedora Bugzilla shows someone else having that problem with HD 5450. Maybe its a general Evergreen problem.