I'm honestly not sure what fixed the issue, but I am successfully able to use the onlykey-cli without root privileges. I suspect the issue was my method of testing whether a udev rule was being triggered actually was interfering with it working. I used "udevadm test" and noticed two things. First, was even when I was able to run onlykey-cli without root privileges, running the test command did not show that the udev rule was triggered. Second, each time the test command was performed, I had to restart the computer before onlykey-cli would work again.
In addition to "udevadm test" being a potential cause of my issues, it is unclear whether my system config changes also contributed to the solution. Instead of creating a standalone udev rule service as I had originally, I adapted the config from https://lists.gnu.org/archive/html/help-guix/2018-05/msg00159.html and modified the udev service type to include the udev rules for the onlykey. I also imported the rules directly from github rather than manually transcribing the rule as before. I'm going to call it a day and try to do some exploration another day to figure out the root cause. For now, I just wanted to say thank you, Florian, for your help today. I hope this information can save someone else some headaches in the future. If I find out the root cause, I'll be sure to follow up here as well. onlykey udev rule definition and extension of udev service type --8<---------------cut here---------------start------------->8--- (define %onlykey-udev-rule (file->udev-rule "49-onlykey.rules" (let ((version "v1.2.5")) (origin (method url-fetch) (uri "https://raw.githubusercontent.com/M0Rf30/https://raw.githubusercontent.com/trustcrypto/trustcrypto.github.io/master/49-onlykey.rules";) (sha256 (base32 "1pj9i4hp0d74073x1qqwigd0cyriamg65zmx2j98mi0k66qrhcxa")))))) (define %my-services (modify-services %desktop-services (udev-service-type config => (udev-configuration (inherit config) (rules (append (udev-configuration-rules config) (list %onlykey-udev-rule))))))) --8<---------------cut here---------------end--------------->8--- service field definition --8<---------------cut here---------------start------------->8--- (services (append (list (service gnome-desktop-service-type) (service xfce-desktop-service-type) (bluetooth-service #:auto-enable? #t) (set-xorg-configuration (xorg-configuration (keyboard-layout keyboard-layout)))) %my-services)) --8<---------------cut here---------------end--------------->8--- Regards, Antwane
