mb850063@... wrote:

> I don't have a /etc/trinity/tdm/tdmrc file (debian stretch).

This is really strange

Stretch here and $ dpkg -S /etc/trinity/tdm/tdmrc
tdm-trinity: /etc/trinity/tdm/tdmrc

and the usable content

$ grep -v '^#' /etc/trinity/tdm/tdmrc

[General]
ConfigVersion=2.3
StaticServers=:0
ReserveServers=:1,:2,:3
ServerVTs=-7
ConsoleTTYs=tty1,tty2,tty3,tty4,tty5,tty6
PidFile=/var/run/tdm.pid

[Xdmcp]
Enable=false
Willing=/etc/trinity/tdm/Xwilling

[Shutdown]


[X-*-Core]
Setup=/etc/trinity/tdm/Xsetup
Startup=/etc/trinity/tdm/Xstartup
Reset=/etc/trinity/tdm/Xreset
Session=/etc/trinity/tdm/Xsession
AllowRootLogin=false
AllowNullPasswd=false
AllowShutdown=Root
SessionsDirs=/usr/share/xsessions,/var/lib/menu-xdg/xsessions,/opt/trinity/share/apps/tdm/sessions
ClientLogFile=.xsession-errors-%s

[X-*-Greeter]
LogoArea=None
LogoPixmap=/opt/trinity/share/apps/tdm/pics/tdelogo.png
AntiAliasing=true
MinShowUID=1000
MaxShowUID=29999
Preloader=/opt/trinity/bin/preloadkde
Theme=@@@ToBeReplacedByDesktopBase@@@

[X-:*-Core]
ServerCmd=/usr/bin/X -br
ServerArgsLocal=-deferglyphs 16 -nolisten tcp
AllowNullPasswd=true
AllowShutdown=All

[X-:*-Greeter]
PreselectUser=Previous
FocusPasswd=true
LoginMode=DefaultLocal
AllowClose=true

[X-:0-Core]
ClientLogFile=.xsession-errors

[X-:0-Greeter]


look in 


[X-*-Greeter]
...
MinShowUID=1000
MaxShowUID=29999