@satmandu I'm unable to reproduce the complete display failure you're
seeing on impish here, although I can certainly produce the freezing
video failure I mentioned above (and that is still occurring on the
-proposed kernel). Given that a fix for this is unlikely prior to
impish's release I'm currently pondering the pros and cons of switching
at least the desktop image to fkms as a (temporary) workaround.

On hirsute, I'm unable to reproduce either the display failure *or* the
display freeze I'm seeing on impish, which is odd (and suggests that
perhaps there's a different root cause in each).

Is there any chance you (or any other interested party seeing the same
issue) could test the current hirsute kernel to verify that you're
seeing display failure there too and, if you are, whether a test kernel
[1] that Juerg's produced fixes the issue? I've also produced a bump for
the boot firmware which may affect the results (of either hirsute or
impish) in my firmware PPA [2].

The firmware bump seems to affect some of the error messages produced,
but at least in my case it hasn't affected the display freeze (on
impish) so I anticipate it may not affect the display failure issue
either (on either release).

[1] https://kernel.ubuntu.com/~juergh/hirsute-raspi/
[2] https://launchpad.net/~waveform/+archive/ubuntu/firmware/+packages

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https://bugs.launchpad.net/bugs/1944397

Title:
  HDMI does not display anything with Impish RPi desktop image

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