Bug#1117594: openssh-client: interactive session traffic slow and erratic
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On Wed, 08 Oct 2025 11:45:02 +0200 Francesc Zacarias <fzacarias3k@gmail.com>
wrote:
> Package: openssh-client
> Version: 1:10.1p1-1
> Severity: grave
> Justification: renders package unusable
> X-Debbugs-Cc: fzacarias3k@gmail.com
>
> Dear Maintainer,
>
> * What led up to the situation?
> Installing the latest openssh-client package in unstable
> (1:10.1p1-1). all
> * What exactly did you do (or not do) that was effective (or
> ineffective)?
> My interactive connections to SSH servers are not working well. All
> keys and commands are being displayed with a very long delay.
> The connection seems to freeze, but if I type a lot of keys, my
> previous commands are eventually displayed.
> I suspect this is related to the IP QoS changes introduced in openssh
10.1.
> Sending many keys/commands causes a local buffer to fill and the
> packet eventually gets sent. But this is not a sustainable way to
> use SSH interactively.
>
> Tried different settings for the IPQoS option, but it did not make a
> difference.
>
> Reverting to a previous version of the package
> (openssh-client 1:10.0p1-8 from testing/forky) fixed the issue.
>
I seem to experience the same (kind of) issue here. I don't have a bugzilla
account so I can't check the linked bug but I noticed that disabling
ControlMaster (which I have set to auto) seems to workaround the issue for me.
Regards,
- --
Yves-Alexis
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