I just subscribed so I could post this workaround. It took me days to figure out what was actually wrong with the libice in Archaroo (I use Manjaro, but it's Arch's PGKBUILDS that they use for these packages). It's misleading because of the "ICE connection refused! No supported authentication protocols" etc.

What happened is that the location of ICEauthority has been changed to /run/user/UID/ICEauthority (which is $XDG_RUNTIME_DIR) from ~/.ICEauthority and it doesn't jibe. Blank files are being created in both locations, that don't get the magic cookie data written to them.

A workaround is to simply set an ICEAUTHORITY environment variable...

export ICEAUTHORITY=/home/yourname/.ICEauthority

I just added that variable to the top of my ~/.xinitrc file that I use with startx

export ICEAUTHORITY=/home/grogan/.ICEauthority

exec starttde

I am using current git sources for trinity, and that workaround works for me.

I love Trinity by the way, it's my favourite desktop in the world. (I liked KDE 3.x back in the day).