On my main computer, I use a Yubikey to store my GPG key; which, in turn, I also use as an SSH key. FMU this is pretty standard use for Yubikeys, however it does depend on the gpg-agent acting as the ssh-agent. To my surprise, upon moving over to GNOME, this wasn't working because the gpg-agent could not seem get control of the ssh-agent. It would seem that by the time systemd would start the gpg-agent at the User level, the ssh-agent was already started. After some digging (and help from genr8eofl_) we found that the culpit was GDM. (see `journalctl -b | grep ssh`) We further found that upon commenting out lines 211-216 of `/etc/gdm/Xsession` it solves the problem, and let gpg-agent now able to function correclty. That said, I didn't find much of this documented any where. Much less, any option to disable this behavior. I did discover that this is acutally intended by upstream, however, without any way to configure this option, I can see this being a problem for others with a similar use case. Therefore I would propose that prephaps it would be a good idea to make add a USE flag to GDM (such as `ssh` or `ssh-agent` or `remove-ssh`) to disable this behavior. I don't mind doing the PR, if determined this would be a good idea. At the very least, this issue can serve as something of a reference. Reproducible: Always
Created attachment 774954 [details] journalctl -b | grep ssh
Created attachment 774957 [details] /etc/gdm/Xsession (fixed)
I found a way to disable using environment variables. I've documented how to disable it properly here: https://wiki.gentoo.org/wiki/GNOME/GDM#Stop_GDM_from_loading_SSH_Agent
