Unable to log into X session via gdm

The latest guix system reconfigure (of yesterday) left me unable to login into

my X session. guix system rollback DID NOT fix it.

I would enter my password and it would "try" to login and return right back to

the gdm login screen.

I've since removed gdm from my OS configuration (because I have to do actual

*work* on this computer), but I think it would have been enough to just

chown /var/lib/gdm and rm ~/.xsession-errors (!) in order to make it work

again.

Does that mean that user ids are non-reproducible?

Why not have user_id = hash(user_name) ? Then they *are* reproducible.

(I've tried finding the spot where those user accounts are generated/updated

but so far have been unable to)

Anyway, this is just to record the problem and workaround. I won't do

further research on this problem on it on this computer.

The "gdm" system account is gone by now because I've removed gdm from the

OS configuration--and I don't plan on adding it ever again.

For reference, in order to remove gdm from the system configuration in

/etc/config.scm, do:

(1) Replace %desktop-services by

(remove (lambda (service) (eq? (service-kind service) gdm-service-type)) %desktop-services)

(2) Add (service slim-service-type) to SERVICES in /etc/config.scm

(3) guix system reconfigure /etc/config.scm

Danny Milosavljevic <dannym@scratchpost.org> skriver:

Can you find any clues in the log files as to why this happened?

Did you reboot after reconfiguring?

Hi,

On Sun, 29 Nov 2020 18:00:44 +0100

Marius Bakke <marius@gnu.org> wrote:

I did check, but there were not really good clues in the logs, among other

things because it seemed that ~/.xsession-errors did not get updated. ls

did report that ~/.xsession-errors belongs to me, but it still didn't update

it, which is why I then removed it. But I only did that after removing gdm

as well, so I don't know whether removing gdm or removing ~/.xsession-errors

or both fixed it.

Checking the logs again, I have only this interesting line:

I had selected the older system generation in the grub boot menu.