Have you tried clearing gdm's cache? I think something like rm -rf ~/.cache/gdm 
might solve the issue. I'm not sure for your other questions.

Le 7 mai 2023 14:11:40 GMT+02:00, Gottfried <gottfr...@posteo.de> a écrit :
>Hi,
>
>I did a rollback on my guix system four times,
>
>but MATE was not recovered.
>
>it seems it is a gdm problem.
>
>---------------------------------
>
>Am I the only one who has MATE-Desktop?
>
>---------------------------------
>1.
>Is there a way to repair gdm
>or should I wait for a next update?
>
>2.
>Or should I install an other Desktop like LXDE
>
>3.
>Is the plasma-desktop already working?
>
>
>Kind regards
>
>Gottfried
>
>
>
>Am 06.05.23 um 10:22 schrieb Gottfried:
>> Hi,
>> 
>> since 2 days MATE Desktop doesn’t start properly.
>> The additional monitor doesn’t get a signal, so I have only the laptop.
>> 
>> Additionally on the screen the icons are different.
>> It seems like a basic, a save configuration.
>> 
>> I checked the cable of the monitor, it is o.k.
>> I checked the monitor with a different PC, it is o.k.
>> 
>> I did a "guix pull" on Thursday.
>> 
>> on Friday the problems occured.
>> 
>> Today I did a "guix pull" and a "sudo system reconfigure..." again,
>> it did not help.
>> 
>> When I started the "Enlightenment" Desktop, then the additional monitor 
>> worked.
>> 
>> So it is sure that MATE makes problems.
>> Does somebody have the same trouble?
>> 
>> 
>> Kind regards
>> 
>> Gottfried
>> 
>> 
>

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