Comment 27 for bug 1944397

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Dave Jones (waveform) wrote :

@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