https://bugzilla.kernel.org/show_bug.cgi?id=200633
Bug ID: 200633 Summary: [Regression] VGA not being detected with R9 380 using AMDGPU after 4.17 kernel update. Product: Drivers Version: 2.5 Kernel Version: 4.17 Hardware: x86-64 OS: Linux Tree: Mainline Status: NEW Severity: low Priority: P1 Component: Video(DRI - non Intel) Assignee: drivers_video-dri@kernel-bugs.osdl.org Reporter: syboxez@gmail.com Regression: No
OS: Debian Sid Kernel: 4.17.8 GPU: AMD R9 380 Mesa version: 18.1.4
After upgrading from 4.16 to 4.17 (this bug was also reproduced on 4.18-RC3), xrandr reports VGA displays (normally DVI-I-1 in my case) as digital displays (DVI-D-1), and will display a black screen on the monitor I am attempting to use. In 4.16, it worked perfectly. Booting the system with the 4.16 kernel resolves the issue.
I will be happy to collect any useful logs upon request, as I'm not too sure what to look for.