Synergy and Parallels - Modifier keys (shift, ctrl, caps) no longer work

Machine 1:
Gentoo Linux
Synergy v 1.3.1 Server
Keyboard and Mouse are hooked to this machine

Machine 2:
Gentoo Linux
Synergy v 1.3.1 Client
Parallels v 2.1.1670

• Host: Gentoo
• Guest: Windows XP

The modifier keys work fine on machine 1 and on the host OS of machine 2
Inside the guest OS of machine 2, CTRL, CAPS LOCK, SHIFT, etc do not work.
I've seen posts about this in the forums, but they all deal with the Mac Desktop update build.

I actually think that all my modifier keys worked before I installed the Parallels Tools. But, I've tried uninstalling them, but i still have the same issue.

 

Seems it's a Synergy problems and Parallels do not support Synergy in current version.

 

For anyone who stumbles upon this in the future, here is the response I received from Parallels support, which solved the issue for me in Parallels 14 (I ran the commands while the VM was shut down, but I don't know whether it makes a difference):

To resolve the issue please, open Terminal (Applications > Utilities > Terminal) and execute the following commands:

defaults write 'com.parallels.Parallels Desktop' 'HID Host Hook.Allowed Sources' "synergy"
defaults write 'com.parallels.Parallels Desktop' 'HID Host Hook.Allowed Sources' "synergyc"

 

Thanks for posting this! It does indeed fix the Synergy issues, but not in Coherence mode. I wonder if there are any commands to fix that specifically.