I'm running Manjaro 18.1.0 and using the interception-caps2esc 0.1.3-2 plugin via AUR. My /etc/udevmon.yaml and /etc/systemd/system/udevmon.service are setup as described in the answer here. This has been working fine for months, but has now suddenly stopped working. I tried re-booting.
I'm quite stumped as to what's caused the difference. I notice, however, that running systemctl status udevmon.service returns
● udevmon.service - udevmon
Loaded: loaded (/etc/systemd/system/udevmon.service; enabled; vendor preset: disabled)
Active: inactive (dead) since Sun 2019-10-13 16:34:06 CEST; 20min ago
Main PID: 7749 (code=dumped, signal=SEGV)
Oct 13 16:34:06 my-pc systemd[1]: Started udevmon.
Oct 13 16:34:06 my-pc systemd[1]: udevmon.service: Main process exited, code=dumped, status=11/SEGV
Oct 13 16:34:06 my-pc systemd[1]: udevmon.service: Failed with result 'core-dump'.
which I suppose is relevant. systemctl reset-failed does not help, and my understanding of systemd and the workings of caps2esc is too limited to identify relevant next steps for solving this problem or for troubleshooting.
My question: What steps can I take to resolve or further troubleshoot this issue?
I experienced the same issue and was able to resolve it by reinstalling interception-tools and interception-caps2esc (I'm using yay):
yay -S interception-tools
yay -S interception-caps2esc
And then restarting the udevmon service:
sudo systemctl restart udevmon.service
I can't explain why it broke or why this fixes it but it did for me.