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Server: Debian testing, with the 1.4.14 deb downloaded and installed. Client: Windows 7, with 1.4.14 downloaded and installed. Both are Premium.

On Debian, start the server with synergys -f -c synergy.conf, because running it from the KDE menu makes it give an error "Option not supported on Linux: --enable-drag-drop" (and incidentally I can't find any file that might be telling it to use that option).

On Windows, run the client. Both are using encryption, with a simple password to be sure it's correct. The client says "WARNING: failed to connect to server: Protocol error from server", and the server says "NOTE: new client disconnected".

I haven't changed any configuration except the password, and 1.4.12 worked on the same machines just minutes ago.

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Maybe this would help synergy-foss.org/osqa/questions/2577/… –  sorin Oct 23 '13 at 11:22
I'm having the same problem but with 1.4.15. Server is my Macbook and client is Ubuntu 13.10. Let us know if you find a solution. –  Mike Haas Oct 23 '13 at 20:36
As a side note, it works just fine when using the GUI. –  Mike Haas Oct 23 '13 at 20:36
Sorin - no, both sides are using encryption, and I set a password short enough to get right! –  Peter Westlake Oct 23 '13 at 22:31
I'm using 1.4.17 now, on a new machine, and that works. I never did solve the problem. –  Peter Westlake May 12 '14 at 13:33

1 Answer 1

up vote 4 down vote accepted

I just got the same error.

synergy protocol error from server

My server is mac using synergy 1.5.0. My Client is Windows 7 using synergy 1.4.17. Both of them are using GUI version.

After I read your post, I reset the password. It's working well now.

I hope this will help others.

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This was exactly my issue; try stopping the service and resetting the password on both machines, and then restarting the service (server first, then client). –  Topher Fangio Aug 13 '14 at 19:17
My issue was also encryption password related. I forgot the configure the client with the same encryption password as on the network. A more helpful error than "protocol error from server" like "decryption failed" would have been helpful though –  protongun Sep 8 '14 at 16:35
Odd - I can only make it work with no password. Even a very simple password set at both ends fails. –  Danny Staple Sep 17 '14 at 14:23
Newbie question: How do you reset the password in Synergy? –  Nocturne Nov 3 '14 at 20:19

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