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Bug#1010365: linux: failure to boot on Raspberry Pi Compute Module 4 (black screen)

Cross-posted to 2 groups.

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Source: linux
Version: 5.17.3-1
Severity: important
X-Debbugs-Cc: raspi-firmware@packages.debian.org

Hi,

In the process of testing patches for the Raspberry Pi Compute Modules
(CM3 and CM4), for bullseye[1][2] and bookworm[2], I discovered that
bookworm images don't boot on the CM4.

 1. https://bugs.debian.org/1010317
 2. https://bugs.debian.org/996937

The usual start-up rainbow is displayed, the screen turns to black and
nothing happens. My first stop was trying to downgrade the bootloader
(shipped by the raspi-firmware package) to the bullseye's version, but
that didn't help.

Then I moved to starting from a bullseye image (which boots), upgrading
the raspi-firmware package, that still boots.

Then I deployed 5.16.18-1 (from snapshot.debian.org), that still boots.

Then I deployed 5.17.3-1, and it broke booting.

I'll try and pinpoint when it broke using the various intermediary
versions:

 - 5.17~rc3-1~exp1
 - 5.17~rc4-1~exp1
 - 5.17~rc5-1~exp1
 - 5.17~rc6-1~exp1
 - 5.17~rc7-1~exp1
 - 5.17~rc8-1~exp1
 - 5.17.1-1~exp1

and then try to figure out what broke exactly. Contrary to my earlier
efforts to introduce support for that hardware a few months ago, I
haven't been following upstream changes recently, so I'll need to catch
up.


Cheers,
-- 
Cyril Brulebois -- Debian Consultant @ DEBAMAX -- https://debamax.com/

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Thread

Bug#1010365: linux: failure to boot on Raspberry Pi Compute Module 4 (black screen) Cyril Brulebois <cyril@debamax.com> - 2022-04-29 18:20 +0200
  Processed: Re: Bug#1010365: linux: failure to boot on Raspberry  Pi Compute Module 4 (black screen) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2022-04-29 19:40 +0200
  Bug#1010365: linux: failure to boot on Raspberry Pi Compute Module 4 (black screen) Cyril Brulebois <cyril@debamax.com> - 2022-04-29 19:40 +0200
    Bug#1010365: linux: failure to boot on Raspberry Pi Compute Module 4 (black screen) Cyril Brulebois <cyril@debamax.com> - 2022-04-30 07:20 +0200
  Bug#1010365: linux: failure to boot on Raspberry Pi Compute Module 4 (black screen) Bjørn Mork <bjorn@mork.no> - 2022-04-30 11:40 +0200
    Bug#1010365: linux: failure to boot on Raspberry Pi Compute Module 4 (black screen) Cyril Brulebois <cyril@debamax.com> - 2022-04-30 22:00 +0200
  Processed: Re: Bug#1010365: linux: failure to boot on Raspberry  Pi Compute Module 4 (black screen) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2022-04-30 22:00 +0200
  Bug#1010365: probably related - seeed studio dual gigabit CM4 does not reboot + does not boot once upgraded. Eugen Stan <eugen.stan@netdava.com> - 2022-05-15 12:50 +0200

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