RDP stopped working after upgrade from 22 to 24

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Hello :wave:

I have a mini PC on my LAN that I can only rarely have physical access to, so I’ve been using the default remote desktop service that comes with Ubuntu to connect to it from my laptop using the Jump Desktop client. I also have a samba share running from it and I can access it through SSH.

With a recent upgrade from Ubuntu 22 to 24, everything works fine except RDP. Jump Desktop tries to connect but stops and logs:
Bad NTLM message signature
ntlm verify message NtlmChallenge failed!
ntlm_process failed
rdpc_credssp_process_tsrequest failed
rdpc_credss_process_packet failed

On the Ubuntu side, everything looks ok(?), grdctl status gives status enabled in the matching port, but I’m not sure what else to check. Any ideas?

Not sure if this post might be related to VNC server stopped working after Ubuntu 22 -> 24 upgrade since I’m just using the remote desktop that already comes with Ubuntu.

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The Ubuntu 24.04 upgrade seems to be causing widespread RDP/VNC issues. This appears to be due to changes in the remote desktop stack, particularly with gnome-remote-desktop.

Key issues observed:

  • NTLM authentication failures with RDP clients
  • Session persistence problems
  • Poor performance at high resolutions
  • Authentication and connection drops

Two options to consider:

  1. Switch to alternative remote access:

    • x11vnc
    • NoMachine NX
    • Apache Guacamole

  2. Roll back to Ubuntu 22.04 (as the other user did) if remote access is critical for your workflow. 22.04 is LTS and supported until 2027.

How often do you need remote access? This would help determine if a rollback is warranted.

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Thanks, popey. Since it’s a mini-PC under the TV, the only way I get to the desktop is remotely. But I’ll consider my options before rolling back :thinking:

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This bug is really annoying, it seems to have been made worse by an update recently for me. The 24.04.01 seems to be the issue.

Is there any form of fix for this at all? Any suggestions? I tried editing out using wayland, but that just stopped the desktop from loading.

Thanks
Paul.

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