Ubuntu

  1. Bug #2063877
  2. Comment #5

Comment 5 for bug 2063877

Revision history for this message
theofficialgman (theofficialgman) wrote : Re: Only black screen on boot with AMD Barcelo and Intel Iris Xe GPU without nomodeset

likely duplicate of earlier reported and triaged bug https://bugs.launchpad.net/systemd/+bug/2063143

here is the TLDR:
"AMD kernel developer wants to classify this is as both SDDM bug and plymouth bug https://gitlab.freedesktop.org/drm/amd/-/issues/3341. amdgpu kernel driver is not ready by the time that sddm and plymouth are started in some cases (race condition). Marking this as a sddm and plymouth bug (in addition to linux) because of this.

To me it seems that at least a systemd service should be handling blocking starting GUI userspace services until the kernel drivers are actually loaded but that is just my thought. I guess the AMD developer sees this the same way you do Daniel."

yes this affects all drivers. the kernel GPU drivers are not done loading by the time that SDDM starts which results in a black screen.