On a fresh Solus install or live usb, I get the following error when connecting to a remote server via SSH and trying to launch an X-window:
“Invalid MIT-MAGIC-COOKIE-1 key”
Serendipitously, I noticed that this problem goes away installing gdm. As it turns out, gdm install xhost (which is not installed in a default installation with lightdm) and includes a /etc/gdm/Xsession file that contains the following line:
xhost +si:localuser:id -un || :
The default lightdm installation has no analogous Xsession file, but I got X-windows working via ssh by installing xhost and adding the following to my .bashrc:
I'm not sure how best to handle this situation in the default lightdm setup, but I just wanted to bring this to the maintainers attention.