Created attachment 8122 Print of the screen Hello, It is not possible to change user on wiskermenu using Debian 9 distro. When I am logged and try to change to another user the icon does not allow a click neither show its contrast, it seems that does not have the proper button, only a image. I noticed this using Fedora XFCE and now, using Debian but I did not have this problem using Xubuntu 18.04. I searched about it at internet but did not find something to explain this. There is an attachment printed of the screen and the cursor of the mouse pointing that. Thanks.
You need to configure the command in the preferences. It is grayed out because the default value for the switch user command is not found. I don't know what your display manager is (if you are using one), so I can't tell you what you need to set the value to. Xubuntu by default uses LightDM and sets the value for "Switch User" to be "dm-tool switch-to-greeter", if that helps any.
Hi, I use LightDM and the value was set "gdmflexiserver" and I do not know why, because I did not change anything. But, I set the value to "dm-tool switch-to-greeter" as you said and now it's working properly. Thanks for the help.