With start-desktop, mouse position wrong after resizing client window

[András Korn]

I have a Debian sid client with 4.1-20200915r27467-1 and an OpenSuSE Leap 15.1 server.

I start an lxqt desktop using

xpra start-desktop ssh://user@server --start-child=lxqt-session --exit-with-children

The client window is too small to be useful by default, so I maximized it.

At this point, mouse clicks actually hit an area a few (~10-15) pixels to the right and down of where the mouse pointer is shown.

If I resize the client window back to its original size, mouse clicks work as expected again.

Using the same Debian sid box that is the client also as the server (i.e. start-desktop ssh://localhost from the same client), I can't reproduce the problem.

[András Korn]

With start instead of start-desktop, the issue also doesn't manifest between the same client and same server.

[migration script]

this ticket has been moved to: ​https://github.com/Xpra-org/xpra/issues/2892