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I have re-checked the situation, and the problem is no longer reproducible, it is now possible to log in three times in a row: > andrew@a68n:~$ x2goclient > x2go-INFO-1> "Starting X2Go Client 4.1.2.1..." > x2go-WARNING-1> English language requested, not loading translator. > x2go-WARNING-1> English language requested, not loading translator. > QObject::connect: No such slot ONMainWindow::slotCheckAgentProcess() > x2go-INFO-3> "Started X2Go Client." > x2go-INFO-8> "Starting connection to server: bulls-eye:22" > Generating public/private rsa key pair. > Your identification has been saved in /home/andrew/.x2go/ssh/gen/key.jYUNNC. > Your public key has been saved in /home/andrew/.x2go/ssh/gen/key.jYUNNC.pub. > The key fingerprint is: > SHA256:aNhrCXUszZRiBkhcKFQoJ3/EfB97H885SEEZ3esunrs X2Go Client RSA user key > The key's randomart image is: > +---[RSA 4096]----+ > |.++Bo. .. .o+ . | > |+.= + ==o o . .| > |.= . +oo=o . .| > | . .+ +o . o . | > | .o + S. o =.. | > | o o o =. | > | + .. | > | . ... | > | .E+ | > +----[SHA256]-----+ > x2go-INFO-8> "Starting connection to server: bulls-eye:22" > Generating public/private rsa key pair. > Your identification has been saved in /home/andrew/.x2go/ssh/gen/key.ZjtFXC. > Your public key has been saved in /home/andrew/.x2go/ssh/gen/key.ZjtFXC.pub. > The key fingerprint is: > SHA256:uvDKzDbQtgirsRSFhbliebRdfZEiVZx5pjFesdjnVlE X2Go Client RSA user key > The key's randomart image is: > +---[RSA 4096]----+ > | o. o.oo=...E| > | oo. o o Oo+. .| > | .+.o . . +.Bo ..| > |.+.o . o o .| > |o... S o | > |. o o . . | > |.+ +... | > |oo.++o . | > |+ .=oo | > +----[SHA256]-----+ > x2go-INFO-8> "Starting connection to server: bulls-eye:22" > Generating public/private rsa key pair. > Your identification has been saved in /home/andrew/.x2go/ssh/gen/key.MunRXq. > Your public key has been saved in /home/andrew/.x2go/ssh/gen/key.MunRXq.pub. > The key fingerprint is: > SHA256:oMeOHRJOi4Akkr4IWzCgFnjS+csu4EFjzfD4hJVf8UE X2Go Client RSA user key > The key's randomart image is: > +---[RSA 4096]----+ > |*= .. .oE | > |%.=o .. . | > |=*O.+ o . | > |oO.O.* . | > |=o*.=.+ S | > |+o .o* . | > |..... o | > | .. . | > | . | > +----[SHA256]-----+ > There was a kernel-update and some other updates in the meantime, maybe I am doing too sloppy in updates-tracing, so it is sometimes hard to tell, what exactly resolved the problem. -----BEGIN PGP SIGNATURE----- iF0EARECAB0WIQTF9uNaslvnJpWt8kXn6sEfJS3nCwUCYEhsMQAKCRDn6sEfJS3n C+eKAJoDSbIAf4oZ1UNv5QIHKGkKiXPYXQCfSY5Xd16ltkUBoYAVhThbZA9iVf4= =eMwT -----END PGP SIGNATURE-----