Issues with RDP Connection from Remmina to KDE Remote Desktop (Wayland)

Hi,

I’m running two NixOS machines, both using the unstable channel with KDE 6 on Wayland. I’m trying to use Remmina to RDP from my main machine to a target machine, which has KDE’s built-in remote desktop server enabled.

When I try to connect, the target machine shows a notification saying, “Remote session started, requested access to input device and screens,” but nothing actually happens on the Remmina side, the connection doesn’t go through. I also tried the KDE remote client, but it was even worse.

For context:

  • Firewall: I don’t need to worry about open ports as I’m using Tailscale, but I’ve opened the necessary RDP ports anyway for troubleshooting, and it didn’t help.
  • OS: Both machines are running NixOS with the unstable channel, and both are using KDE 6 with Wayland.

Here’s the debug log from Remmina if anyone needs more details. Any help or suggestions would be greatly appreciated!

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There is more info about debugging Remmina on https://gitlab.com/Remmina/Remmina/-/wikis/Usage/Remmina-debugging
(DEBUG) - (rcw_map_event) - Mapping: RemminaConnectionWindow
(DEBUG) - (remmina_protocol_widget_map_event) - Calling plugin mapping function
(DEBUG) - (remmina_protocol_widget_open_connection_real) - Opening connection
(DEBUG) - (remmina_rdp_event_init) - Disable smooth scrolling is set to 0
(DEBUG) - (remmina_rdp_event_init) - Adding GDK_SMOOTH_SCROLL_MASK
(DEBUG) - (remmina_protocol_widget_open_connection_real) - Have SSH
(DEBUG) - (remmina_rdp_main) - RDP data path is /home/user/.local/share/remmina/RDP
(DEBUG) - (remmina_rdp_main) - Not using system proxy settings
(DEBUG) - (remmina_rdp_tunnel_init) - Tunnel init
(DEBUG) - (remmina_protocol_widget_start_direct_tunnel) - SSH tunnel initialization…
(DEBUG) - (remmina_protocol_widget_start_direct_tunnel) - Calling remmina_public_get_server_port
(DEBUG) - (remmina_protocol_widget_start_direct_tunnel) - Calling remmina_public_get_server_port (tunnel)
(DEBUG) - (remmina_protocol_widget_start_direct_tunnel) - server: 100.126.27.50, port: 3389
(DEBUG) - (remmina_rdp_tunnel_init) - protocol_plugin_start_direct_tunnel() returned [100.126.27.50]:3389
(DEBUG) - (remmina_rdp_tunnel_init) - Tunnel has been optionally initialized. Now connecting to 100.126.27.50:3389
(DEBUG) - (remmina_rdp_main) - gfx_h264_available: 1
(DEBUG) - (remmina_rdp_main) - Resolution set by the user: 1704x1084
(DEBUG) - (remmina_rdp_main) - Resolution set after workarounds: 1704x1084
(DEBUG) - (remmina_rdp_main) - proxy_type: (null)
(DEBUG) - (remmina_rdp_main) - proxy_username: (null)
(DEBUG) - (remmina_rdp_main) - proxy_password: (null)
(DEBUG) - (remmina_rdp_main) - proxy_hostname: (null)
(DEBUG) - (remmina_rdp_main) - proxy_port: 80
(DEBUG) - (remmina_rdp_main) - Network settings not set
(DEBUG) - (remmina_rdp_main) - rdp_keyboard_remapping_list: 
(DEBUG) - (remmina_rdp_main) - Log level set to to INFO
(DEBUG) - (remmina_rdp_event_on_clipboard) - gp=0x21ccb10: owner-change event received
(DEBUG) - (remmina_rdp_event_on_clipboard) - gp=0x21ccb10 owner-change: new owner is different than me: new=(nil) me=0x21ccb10
(DEBUG) - (remmina_rdp_event_on_clipboard) - gp=0x21ccb10 owner-change: new owner is not me: Sending local clipboard format list to server.
(DEBUG) - (remmina_rdp_cliprdr_get_client_format_list) - gp=0x21ccb10 sending to server the following local clipboard content formats
(DEBUG) - (remmina_rdp_cliprdr_get_client_format_list) -      local clipboard format text/plain will be sent to remote as 1
(DEBUG) - (remmina_rdp_cliprdr_get_client_format_list) -      local clipboard format text/plain;charset=utf-8 will be sent to remote as 13
(DEBUG) - (rco_on_disconnect) - Disconnect signal received on RemminaProtocolWidget
(DEBUG) - (remmina_file_save) - Saving profile
(DEBUG) - (remmina_file_save) - We have a secret and disablepasswordstoring=0
(DEBUG) - (remmina_file_save) - We have a secret and disablepasswordstoring=0
(DEBUG) - (remmina_file_save) - We have a secret and disablepasswordstoring=0
(DEBUG) - (remmina_file_save) - We have a secret and disablepasswordstoring=0
(DEBUG) - (remmina_file_save) - Profile saved
(DEBUG) - (remmina_file_save) - Connection profile states saved
(DEBUG) - (remmina_network_monitor_status) - G_NETWORK_CONNECTIVITY_FULL
(DEBUG) - (rco_on_disconnect) - Could not disconnect