So you're saying that when another user logs into the same client and uses the same installation of the TurboVNC Viewer, they do not observe the issue?  IOW, the issue is specific to your user account on that machine?

On 7/29/22 7:38 AM, Felix Natter wrote:
hello DRC,
no, I am just using "/opt/TurboVNC/bin/vncserver :1". Yes, my comment about adaptive resolutions is wrong :-/

TurboVNC 3.0 Server with TigerVNC-Viewer (64-bit) Version 1.8.0 does not show this problem.

It is unlikely a network/firewall problem because for another user it works fine between the same two computers.

Thanks and Best Regards,
Felix

DRC schrieb am Freitag, 29. Juli 2022 um 13:12:47 UTC+2:

    Are you using ALR or any non-default server settings?  I don't
    understand your comment about adaptive resolutions.  Remote
    Desktop should always adapt the resolution, and what I observe is
    that, after connecting to Windows, the remote desktop is the same
    size as the TurboVNC session.  This is true regardless of whether
    I connect to a Windows VM or a physical Windows machine.

    Generally speaking, a "Rect too big" error is caused by a protocol
    mismatch.  The error could happen if the server sends an RFB
    message that the viewer cannot handle, which is why the server and
    viewer negotiate their capabilities beforehand.  The error could
    also happen due to data corruption on the network, which could be
    the result of a faulty firewall or other intermediary.  In order
    to diagnose the issue, I would first need to reliably reproduce
    it.  Then I would insert a lot of logging statements into the
    server to determine exactly what it is trying to send whenever the
    error occurs.

    Since I can't repro the issue, it would be a useful datapoint to
    determine whether it occurs with a different VNC viewer, such as
    the TigerVNC Viewer.

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