Bug#764607: systemd: systemctl does not re-create display-manager.service symlink

[Michael Biebl]

Am 02.02.20 um 20:45 schrieb Michael Biebl:
> Am 02.02.20 um 16:13 schrieb Yves-Alexis Perez:
>> On Sat, 2020-02-01 at 03:21 +0100, Michael Biebl wrote:
>>> They should also add a
>>
>>> [Install]
>>> Alias=display-manager.service
>>
>>> section
>>
>>> to their service file. Which will make sure that if you run
>>> "systemctl enable foo.service", display-manager.service will point at
>>> the desired display manager.
>>
>> Hi Michael, I tried that, but it seems that it has the side effect of making
>> lightdm restart when upgrading, which is not really a good idea when you're
>> actually in a X session.
>>
>> Any idea how to prevent that?
> 
> Can you show me the (complete) postinst code?
> 

before and after

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