This is a rather specific issue.
- Running Synergy 1.11 on Ubuntu.
- Sharing Keyboard/Mouse from Ubuntu to Other Computers.
- Upgraded Ubuntu to 22.04.
- Synergy stopped sharing.
The problem wasn't the network or the configuration because
- Synergy successfully connected from all clients to the server.
- The server showed all Synergy clients successfully connected.
The odd thing is Chromium. If I start Chromium on the Ubuntu 22.04 server, the keyboard sharing starts working. If I stop Chromium on the Ubuntu 22.04 server, the keyboard sharing stops working. I also noticed the log messages on the Synergy client including "LANGUAGE DEBUG" warnings for every keystroke while the cursor was moved to the client. I assume Chromium setup some debugging channel that Synergy was able to use. (I did not research this.)
Takeaway 1:
The root cause of the problem appears to be the Ubuntu 22.04 switch to Wayland. Synergy doesn't support Wayland, but there are plans:
Takeaway 2:
Synergy has an interim fix. Don't use Wayland with Ubuntu...
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