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Remote Desktop Manager freezes completely when scrolling long log files in SSH connections

Remote Desktop Manager freezes completely when scrolling long log files in SSH connections

avatar
pmurr

Inside an SSH session (connection to RHEL 9) when viewing a very long logfile in the terminal, e.g. 10000+ lines using cat e.g.

more /var/log/verylonglog

Then use any key or page-down to scroll, eg. keeping your finger on the keys.

At one point remote desktop manager freezes. No tabs can be clicked anymore, not useable anymore.
Only option is to kill the process of Remote Desktop Manager.

This happens frequently now after the recently added scroll-fixes for SSH in RDM.
My version is 2025.2.23.0 64-bit (JIT)

All Comments (5)

avatar
Denis Vincent

Hi,

I have been unable to reproduce your issue, but I have identified a possible cause. I will make a fix for that, which should be available in our next release.

Regards

Denis Vincent

avatar
pmurr

Hi Denis,

thanks for your reply.
I can reproduce the behaviour now reliably. I uploaded a video (available for a week) that demonstrates the behaviour here: https://www.filemail.com/d/bjhsinvabfampfv

If you want to reproduce yourself (same as I did in the video):

  1. Login to a linux machine via an SSH connection configured in RDP Manager
  2. download the HPC demo log from here: https://zenodo.org/records/8196385/files/HPC.zip?download=1 and unzip it
  3. Use the command less HPC.log to open/view the log within your SSH session
  4. press and hold PAGE-DOWN key to scroll within the log.

After some time RDP Manager will completely freeze!

You can see everything in the video.

I hope we get that fixed soon, it bites me a lot!

Kind regards

Peter

avatar
pmurr

Trying to upload the video here in the portal, too.

2025-08-06 09-08-09.mkv

avatar
pmurr

Hi,
I upgraded to RDM 2025.2.25.0 64-bit (JIT) and re-tested on 2 Linux machines.
The problem seems to be fixed. Scrolled over 433489 lines and no longer any freeze.
Can you confirm that the update contained a fix for this bug?

Kind regards

Peter

avatar
Denis Vincent

Hi @pmurr

Yes, I can confirm that there is a fix for this scrolling bug. Thanks for letting us know that it worked, since I wasn't sure it would. Our environment for testing could not reproduce the bug even repeating the same actions you described. It is because this bug is dependant on the server behaviour and none of the servers I have access to exhibit the same behaviour as yours.

Again, thanks for the feedback

Regards

Denis Vincent