----- Original Message -----
From: "Ismael L. Donis Garcia" <slibre@???>
To: <dng@???>
Sent: Tuesday, January 06, 2026 3:05 PM
Subject: Re: [DNG] Enabling root login in Daedalus


> ----- Original Message -----
> From: "tito via Dng" <dng@???>
> To: <dng@???>
> Sent: Tuesday, January 06, 2026 2:09 PM
> Subject: Re: [DNG] Enabling root login in Daedalus
>
>
>> On Tue, 6 Jan 2026 13:57:34 -0500
>> "Ismael L. Donis Garcia" <slibre@???> wrote:
>>
>>> ----- Original Message -----
>>> From: "Steve Litt" <slitt@???>
>>> To: <dng@???>
>>> Sent: Monday, January 05, 2026 9:02 PM
>>> Subject: Re: [DNG] Enabling root login in Daedalus
>>>
>>>
>>> > Ismael L. Donis Garcia said on Mon, 5 Jan 2026 09:53:55 -0500
>>> >
>>> >>I tried logging into several graphical environments:
>>> >> Mate
>>> >> KDE
>>> >> LXQT
>>> >> XFCE
>>> >>
>>> >>I can't log into any of them. I'm using the "sddm" window manager.
>>> >
>>> > You should be glad it won't let you log into X or Wayland as root. One
>>> > should *never* log into a graphical environment as root, for security
>>> > and other reasons.
>>> >
>>> > You should log into X or Wayland as yourself, and if you absolutely
>>> > must run a GUI program as user root, use sudo or su -c to do that.
>>> >
>>> > SteveT
>>> >
>>> > Steve Litt
>>> >
>>>
>>> I get the following error; it's a program built in Lazarus + fpc
>>>
>>> root@clt-iyc-03:~# su -c
>>> '/home/idonis/Documentos/ismael/conta_lazarus/librerias/Sistemas/release/linux_amd64/regsystem'
>>>
>>> (regsystem:18518): Gtk-WARNING **: 13:54:24.602: cannot open display:
>>>
>>> Best Regards
>>> --
>>> Ismael
>>> Web Site: https://gitlab.uic.cu/ismael.donis/
>>
>> Hi,
>> try pkexec - Execute a command as another user:
>>
>> pkexec /usr/sbin/gparted
>>
>>
>> see man pkexec for the details.
>>
>> Ciao,
>> Tito
>>
>
> it give me the same error:
>
> root@clt-iyc-03:~# su -c
> '/home/idonis/Documentos/ismael/conta_lazarus/librerias/Sistemas/release/linux_amd64/regsystem'
>
> (regsystem:18518): Gtk-WARNING **: 13:54:24.602: cannot open display:
> root@clt-iyc-03:~# pkexec
> /home/idonis/Documentos/ismael/conta_lazarus/librerias/Sistemas/release/linux_amd64/regsystem
>
> (regsystem:27987): Gtk-WARNING **: 15:01:09.740: cannot open display:
> root@clt-iyc-03:~#
>
> Best Regards
> --
> Ismael
> Web Site: https://gitlab.uic.cu/ismael.donis/
>

Just with:

step 2
Edit /etc/pam.d/sddm
comment out this line:
auth required pam_succeed_if.so user != root quiet_success

step 3
Reboot

But I've learned that I can also do it this way:

>From a console, I use su - to run startx and then run the application from
there.

Thanks everyone, you've taught me several new things.
--
Ismael
Web Site: https://gitlab.uic.cu/ismael.donis/