[Bug 105883] booting with kernel using amd-staging-drm-next on 2400G hangs

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105883

            Bug ID: 105883
           Summary: booting with kernel using amd-staging-drm-next on
                    2400G hangs
           Product: DRI
           Version: DRI git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: blocker
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: joshua613 at gmail.com

I am running an AMD Ryzen 2400G, using its integrated graphics in the Linux
host and a gtx 1070 bound to VFIO for virtualized passthrough.  When I boot
with a kernel fetched from git using amd-dri-next on 4.16, it halts the booting
process, usually somewhere around when it checks UTMP. It does not lock up my
keyboard lights, but nothing is displayed on the screen, it does respond to
control-alt-delete. My system is set up to boot to the command line, I use X11
from there with "startx" usually; when the system completes boot of course.

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