Workaround for sddm conflict with kmscon

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There is an issue with sddm conflicting with kmscon on startup, when if you
don't
log-in quickly enough, kmscon overtakes sddm and you have to reboot after
that.

The way to avoid it is to add kmscon to Conflicts= and After= sections of
sddm.service file.

See the idea here how it's done in plasma-login-manager:

https://invent.kde.org/plasma/plasma-login-manager/-/tree/master/services/plasmalogin.service.in?ref_type=heads

Or here if invent is too slow to load:

https://github.com/KDE/plasma-login-manager/blob/master/services/plasmalogin.service.in

Attaching a patch that fixes the issue at least for me.

May be this could be good to add to Debian's packaged sddm for now too,
until plasma-login-manager is available to help those who want to use kmscon
with better login experience.

Thank you!

Shmerl.

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<div dir=3D"ltr"><div>There is an issue with sddm conflicting=C2=A0with kms=
con on startup, when if you don&#39;t</div><div>log-in quickly enough, kmsc=
on overtakes sddm and you have to reboot after that.</div><div><br></div><d=
iv>The way to avoid it is to add kmscon to=C2=A0Conflicts=3D and After=3D s=
ections of</div><div>sddm.service file.</div><div><br></div><div>See the id=
ea here how it&#39;s done in plasma-login-manager:</div><div><br></div><div=
><a href=3D"https://invent.kde.org/plasma/plasma-login-manager/-/tree/maste=
r/services/plasmalogin.service.in?ref_type=3Dheads">https://invent.kde.org/=
plasma/plasma-login-manager/-/tree/master/services/plasmalogin.service.in?r=
ef_type=3Dheads</a></div><div><br></div><div>Or here if invent is too slow =
to load:</div><div><br></div><div><a href=3D"https://github.com/KDE/plasma-=
login-manager/blob/master/services/plasmalogin.service.in">https://github.c=
om/KDE/plasma-login-manager/blob/master/services/plasmalogin.service.in</a>=
</div><div><br></div><div>Attaching a patch that fixes the issue at least=
=C2=A0for me.</div><div><br></div><div>May be this could be good to add to =
Debian&#39;s packaged=C2=A0sddm for now too,</div><div>until plasma-login-m=
anager is available to help those who want to use kmscon</div><div>with bet=
ter=C2=A0login experience.</div><div><br></div><div>Thank you!</div><div><b=
r></div><div>Shmerl.</div></div>

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