Power management (EC?) issues after installing Debian 12

Hey folks!

I’ve recently installed Debian 12 on my Librem 14, replacing the original PureOS installation. Most things are working fine, but I’m experiencing a few issues related to power management. I’m sort of guessing they’re related to the EC firmware because upgrading that solved power management issues in the past, but I could be wrong.

  • Plugging in headphones when the laptop is on battery power sometimes causes a hard shutdown.
    • I could have sworn that I fixed this in the past by upgrading the EC firmware, but I verified using the steps at Librem-EC on Purism Devices – Purism that the OS reinstall did not affect the EC firmware, it’s still at version 1.13.
  • The “start charge threshold” and “end charge threshold” settings in librem-control are not being respected.
    • I previously installed librem-control on the PureOS installation and set the thresholds to 60% and 80% respectively. That was working fine.
    • Now, on the Debian installation, librem-control is not available directly in the package repos, so I downloaded it from here. However, while it runs, it doesn’t seem to have any effect, e.g. I changed the thresholds to 90% and 100% but it’s still the old thresholds (60% and 80%) which are being respected.
  • The keyboard shortcuts to change brightness stop working after a while (fixed temporarily by a reboot). sudo light -S N still works, so I suppose this could be an unrelated software issue.

Any suggestions for how to resolve or further diagnose these issues?

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Doe any of these issues occur with PureOS?

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No, these issues are all new since installing Debian.

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Debian 13 “trixie” was recently released as the new stable, have you tried that yet?