Hi Denis,

Apologies for the delay.

Denis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org> skribis:

> With the commit right before c219c22cbd[1], my rockpro64 (ARM 64bit
> SBC) boots fine and I get a login prompt both on the attached display
> and serial port.
>
> With c219c22cbd[1] instead it blocks here (see the attached boot.log
> file for the full boot log):
>> [   33.762050] avdd: disabling
>
> I've attached the system.scm file I used for the test. It's being
> reused by a machine configuration in another file (rockpro64.scm) and
> I deploys the configuration with:
>> guix time-machine --commit=$(GUIX_COMMIT) -- deploy -L . rockpro64.scm
>
> References:
> -----------
> [1] commit c219c22cbdb62ba52b50ec8fb12bebce0b1dd459
>     gnu: shepherd@0.10: Use guile-fibers 1.3.1.
>     * gnu/packages/admin.scm (shepherd-0.10)[native-inputs, inputs]:
>       Replace GUILE-FIBERS-1.1 with GUILE-FIBERS-1.3.

I believe this is due to this bug:

  https://github.com/wingo/fibers/issues/89

How about this patch: