[Bug 110478] New: AMDGPU error(failed to set mode: cannot allocate memory) when hdmi connected

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=110478

            Bug ID: 110478
           Summary: AMDGPU error(failed to set mode: cannot allocate
                    memory) when hdmi connected
           Product: xorg
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/AMDgpu
          Assignee: xorg-driver-ati at lists.x.org
          Reporter: cmdrrdo at gmail.com
        QA Contact: xorg-team at lists.x.org

Created attachment 144053
  --> https://bugs.freedesktop.org/attachment.cgi?id=144053&action=edit
xorg log

Hi,

I'm using a Ryzen 3550H laptop with integrated Vega graphics and an additional
Radeon 560. Whenever I boot the laptop with a screen connected to the HDMI
port, the screen turns blank upon lxdm start and I can see these error messages
in the Xorg log:

[   263.699] (II) AMDGPU(0): Setting screen physical size to 1524 x 571
[   263.716] (EE) AMDGPU(0): failed to set mode: Cannot allocate memory
[   263.716] (WW) AMDGPU(0): Failed to set mode on CRTC 0
[   263.817] (EE) AMDGPU(0): failed to set mode: Cannot allocate memory
[   263.817] (WW) AMDGPU(0): Failed to set mode on CRTC 1
[   263.887] (EE) AMDGPU(0): Failed to enable any CRTC


Kernel: is a self-built 5.0.9, but the same has happened with debian
experimental 5.0.2, as well as the debian buster's 4.19.
xserver-xorg-video-amdgpu: 19.0.1-1

If HDMI is not connected, everything is working.

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