Bug#1040956: systemd: Internal USB devices disconnected when `udevadm settle` run in early boot

[Michael Biebl]

Am 13.07.23 um 06:14 schrieb Undef:
> Package: systemd
> Version: 253.5-1
> Severity: important
> X-Debbugs-Cc: debian at undef.tools
> 
> Dear Maintainer,
> 
> On upgrade to systemd 253.5-1 the USB modem on my Librem5 stopped
> working. This also occurs on 252.11-1 (testing) but not on 252.6-1
> (stable) or 253-3 (previously available in unstable.
> 
> This only seems to happen in a very specific configuration:
>    * Librem5
>    * Booting from eMMC
>    * Using full disk encryption
>    * Using an on-screen keyboard such as osk-sdl to unlock the device.
> 
> Digging into the issue, it seems I can trigger it by adding an initramfs
> script which will run `udevadm settle` in the initramfs. This itself
> doesn't remove the USB device, but later in the boot the device will
> disappear.

Since this is hardware specific, my recommendation would be, that you 
run a git bisect (between 252.6 and 252.11) to find the commit which is 
causing this issue for you.



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