Sorry, have now read how --debug works...
Now started with: x2goclient --debug --libssh-debug 2>&1 | tee /tmp/x2goclient-<QTversion>.log
with Qt5.15:
[2022/07/29 19:34:20.759320, 2] channel_open: Creating a channel 46 with 64000 window and 32768 max packet [2022/07/29 19:34:20.760544, 2] ssh_packet_channel_open_conf: Received a CHANNEL_OPEN_CONFIRMATION for channel 46:0 [2022/07/29 19:34:20.760601, 2] ssh_packet_channel_open_conf: Remote window : 0, maxpacket : 32768 [2022/07/29 19:34:20.764500, 2] channel_rcv_change_window: Adding 2097152 bytes to channel (46:0) (from 0 bytes) [2022/07/29 19:34:20.764587, 2] channel_request: Channel request exec success [2022/07/29 19:34:21.075221, 2] grow_window: growing window (channel 46:0) to 1280000 bytes
then it loops here forever:
[2022/07/29 19:29:54.114274, 1] ssh_channel_accept: No channel request of this type from server
Stopping after 4x CHANNEL_OPEN_CONFIRMATION (43...46)
# grep CHANNEL_OPEN_CONFIRMATION /tmp/x2goclient-5.15.log [2022/07/29 19:34:12.681745, 2] ssh_packet_channel_open_conf: Received a CHANNEL_OPEN_CONFIRMATION for channel 43:0 [2022/07/29 19:34:12.897503, 2] ssh_packet_channel_open_conf: Received a CHANNEL_OPEN_CONFIRMATION for channel 44:0 [2022/07/29 19:34:17.564870, 2] ssh_packet_channel_open_conf: Received a CHANNEL_OPEN_CONFIRMATION for channel 45:0 [2022/07/29 19:34:20.760544, 2] ssh_packet_channel_open_conf: Received a CHANNEL_OPEN_CONFIRMATION for channel 46:0
with Qt5.12: results in 8x CHANNEL_OPEN_CONFIRMATION (43...50)
# grep CHANNEL_OPEN_CONFIRMATION /tmp/x2goclient-5.12.log [2022/07/29 19:35:27.930657, 2] ssh_packet_channel_open_conf: Received a CHANNEL_OPEN_CONFIRMATION for channel 43:0 [2022/07/29 19:35:28.147269, 2] ssh_packet_channel_open_conf: Received a CHANNEL_OPEN_CONFIRMATION for channel 44:0 [2022/07/29 19:35:37.330360, 2] ssh_packet_channel_open_conf: Received a CHANNEL_OPEN_CONFIRMATION for channel 45:0 [2022/07/29 19:35:41.191864, 2] ssh_packet_channel_open_conf: Received a CHANNEL_OPEN_CONFIRMATION for channel 46:0 [2022/07/29 19:35:47.790986, 2] ssh_packet_channel_open_conf: Received a CHANNEL_OPEN_CONFIRMATION for channel 47:0 [2022/07/29 19:35:47.968874, 2] ssh_packet_channel_open_conf: Received a CHANNEL_OPEN_CONFIRMATION for channel 48:1 [2022/07/29 19:35:48.649804, 2] ssh_packet_channel_open_conf: Received a CHANNEL_OPEN_CONFIRMATION for channel 49:1 [2022/07/29 19:36:06.888934, 2] ssh_packet_channel_open_conf: Received a CHANNEL_OPEN_CONFIRMATION for channel 50:0
Any further idea how to trace this down?