Public bug reported:
[Impact]
During bootup sequence there is a black screen when it's intended that BGRT
logo continues through bootup.
This is because the stream hasn't been marked for seamless boot and so the
amdgpu kernel module does a modeset which leaves a black screen until next
drawing.
[Test Plan]
Obtain Strix or Strix Halo design that has eDP panel that doesn't
support DSC. (DSC is incompatible with seamless boot).
Turn on drm.debug=0x106.
Verify that message "Marked stream for seamless boot optimization" is
viewed in logs.
NOTE: There are other reasons a black screen could occur during bootup.
The key point here is the new message which indicates that amdgpu has
adopted the seamless boot process.
[ Where problems could occur ]
AMD Strix or Strix Halo designs.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux-oem-6.14 (Ubuntu)
Importance: Undecided
Status: Invalid
** Affects: linux-oem-6.17 (Ubuntu)
Importance: Undecided
Status: Invalid
** Affects: linux (Ubuntu Noble)
Importance: Undecided
Status: Won't Fix
** Affects: linux-oem-6.14 (Ubuntu Noble)
Importance: Undecided
Status: New
** Affects: linux-oem-6.17 (Ubuntu Noble)
Importance: Undecided
Status: New
** Affects: linux (Ubuntu Resolute)
Importance: Undecided
Status: New
** Affects: linux-oem-6.14 (Ubuntu Resolute)
Importance: Undecided
Status: Invalid
** Affects: linux-oem-6.17 (Ubuntu Resolute)
Importance: Undecided
Status: Invalid
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https://bugs.launchpad.net/bugs/2134488
Title:
Seamless boot doesn't work on Strix or Strix Halo
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