[Bug 205069] New: Black screen when starting graphical environment

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=205069

            Bug ID: 205069
           Summary: Black screen when starting graphical environment
           Product: Drivers
           Version: 2.5
    Kernel Version: 5.3.1, 5.4.0-rc1, latest
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: high
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri at kernel-bugs.osdl.org
          Reporter: freddyreimer at comcast.net
        Regression: No

Created attachment 285285
  --> https://bugzilla.kernel.org/attachment.cgi?id=285285&action=edit
kernel .config 5.4.0-rc1

Hello there

On kernels 5.3.1 and 5.4.0-rc1, I get a black screen with a white underscore
cursor in the upper left. The display gets stuck in this state, with no way to
switch to a different TTY or leave this aside from hitting the reset button.
I can secure-shell into the box and get a login at this time, but killing the
process does not fix the display. Sway WM also does this, with it just getting
stuck at the prompt entry.

I have an AMD RX 5700 graphics card, using the amdgpu driver. When I do some
manual configuration by blacklisting amdgpu and writing a stanza in xorg conf
for vesa, I am able to get X running using vesa.

uname -a output: Linux gentoo 5.4.0-rc1 #1 SMP Tue Oct 1 14:24:57 EDT 2019
x86_64 AMD Ryzen 5 3600 6-Core Processor AuthenticAMD GNU/Linux

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