Further, if I use pageant, I can successfully connect under Windows, but not under Wine, where I recieve this error:
I also tried putty under Wine, while pageant is running in background with loaded key, and it also cannot connect, raising:Failure requesting identities from ssh-agent!
If I exit pageant and load the key in putty, I can successfully connect. So it seems that communication between pageant and other application the uses its service fails, probably due to Wine.Disconnected: No supported auth methods available (server sent: publickey)