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Hi, I have been using NoMachine for a few weeks without problems now, but lately, when I try to connect remotely to my computer, I get the issue : “Session negotiation failed”, but I am still using the same computers on both ends, and there has been no major updates.
When I looked into the connection journal, I got the following issue :
29964 32332 2025-06-23 09:37:00 226.670 Main: Entering the GUI event loop.
Info: Connection to 10.96.185.139 port 4000 started at 09:37:00 233.121.
29964 39608 2025-06-23 09:37:01 223.492 ClientSession: A valid certificate for this server was found.
29964 32332 2025-06-23 09:37:10 399.406 ClientSession: Going to query the server for available services.
29964 32332 2025-06-23 09:37:10 878.871 ClientSession: Going to query the node for available services.
29964 32332 2025-06-23 09:37:10 934.629 ClientSession: Going to attach session at index ‘0’.
29964 32332 2025-06-23 09:37:11 122.033 Keyboard: Current model ‘evdev’ session model ‘evdev’ layout ‘fr’ variant ‘(empty)’ options ‘(empty)’.
29964 32332 2025-06-23 09:37:11 603.384 Connection: Connection at 0x0000000005a9f660 failed.
29964 32332 2025-06-23 09:37:11 603.384 ClientSession: Runnable at 0x0000000005a9f660 caused the session at 0x0000000003901560 to fail.
29964 32332 2025-06-23 09:37:11 603.384 ClientSession: Failing reason is ‘La négociation de session a échoué.
Erreur : Impossible de créer la session. L’erreur système est : %s’.
Info: Connection to 10.96.185.139 port 4000 closed at 09:37:11 605.405.
I already tried uninstalling and reinstalling NoMachine on the remote machine. I also made sure that the remote machine was up and running. Could you help me resolve this ?
Hi, you should update to the latest version both sides. It would be useful to know OS details both sides, and whether you are connecting to the physical display or a virtual display. Logs from both the player and the server would be useful. You can extract them using the instructions here: https://kb.nomachine.com/DT08U00298
Send them to forum[at]nomachine[dot]com. Please use the title of this topic as the subject of your email. Thanks!
https://kb.nomachine.com/DT08U00298#1.1 and #1.2.
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