On 10/3/18 11:40 AM, Bob Goodwin-Fastmail wrote:
> On 10/03/18 14:00, Rick Stevens wrote:
>> Assuming you're starting the GUI from systemd startup, you can find
>> which is used by default by doing something like:
>>
>> [root@prophead ~]# ls -l /etc/systemd/system/display-manager.service
>> lrwxrwxrwx. 1 root root 39 Oct 17 2016
>> /etc/systemd/system/display-manager.service ->
>> /usr/lib/systemd/system/lightdm.service
>>
>> So by default, systemd will spin up the lightdm display manager. I think
>> that's set up by a scriptlet when you install XFCE but I won't swear to
>> it.
> .
> [root@box83 bong]# ls -l /etc/systems/system/display-manager.service
> lrwxrwxrwx. 1 root root 35 Apr 25 02:35
> /etc/systemd/system/display-manager.service ->
> /usr/lib/systemd/system/gdm.service
>
> However gdm is not active, it loks like there is no DM running, is that
> possible?
>
> [root@box83 bobg]# systemctl status gdm.service
> ● gdm.service - GNOME Display Manager
> Loaded: loaded (/usr/lib/systemd/system/gdm.service; enabled; vendor
> preset: disabled)
> Active: inactive (dead)
>
> As Joe points out it probably had lightdm running before I began making
> changes trying to fix an intermittent scan problem I can't even describe
> yet.
>
> This resulted from the replacement of a ViewSonic monitor that did not
> deal with edid and I think I have cleaned out all the xrandr stuff but
> perhaps there is some artifact still lurking.
>
> I can systemctl start lightdm or gdm, but what is it running on now,
> nothing?
Try "systemctl status display-manager"
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