See https://wiki.x2go.org/doku.php/doc:de-compat.

On Wed, Jan 25, 2023 at 1:47 AM Richard Grosman <robert.grolms@gmail.com> wrote:

Package: x2goclient-4.1.2.2-2020.02.13-setup.exe Version: 4.1.2.2

Dear developers, bringing this to your attention, I experienced the following myself:

Title: x2go "smearing" windows and extremely slow Link: https://bbs.archlinux.org/viewtopic.php?id=268985

Client machine's OS name: Microsoft Windows 10 Pro Client machine's OS version: 10.0.19045 N/A Build 19045 Client machine's version of X2GoClient: 4.1.2.2 Relevant settings: Session type XFCE (else using default connection, input/output and media session preferences) Server's OS: CentOS Stream release 8 Server's version of the x2goserver package: 4.1.0.3-17.el8.1 (@epel) Server's version of the x2goserver-xsession package: 4.1.0.3-17.el8.1 (@epel) Server's version of the nxagent package: 3.6.x Server's version of any other relevant packages: xfce-polkit.x86_64 0.3-3.el8 xfce4-appfinder.x86_64 4.16.1-3.el8 xfce4-panel.x86_64 4.16.3-1.el8 xfce4-power-manager.x86_64 4.16.0-1.el8 xfce4-pulseaudio-plugin.x86_64 0.4.3-3.el8 xfce4-screensaver.x86_64 4.16.0-3.el8 xfce4-session.x86_64 4.16.0-4.el8 xfce4-settings.x86_64 4.16.5-2.el8 xfce4-terminal.x86_64 0.8.10-2.el8 xfconf.x86_64 4.16.0-1.el8

Steps to reproduce:

1. Have an updated CentOS Stream release 8 server running (e.g. a KVM) with the latest EPEL Repo, x2goserver-xsession packages and 'Xfce' as dnf groupinstall'ed with -y flag.
2. Have an updated Windows 10 Pro client machine running with the latest x2goclient version, configured to ssh on port 22 to 1. with a RSA/DSA key, auto login via SSH Agent or default SSH key on and a shared folder without filename encoding, but automount and 'use ssh to tunnel filesystem through firewalls' checked.
3. Start a session and experience "smearing" windows, loading and rendering extremely slow when moving them around
4. In the session go to Applications > Settings > Window Manager Tweaks > Compositor
5. Turn off 'Enable display compositing' and close the window. Performance and rendering rather match the preferences now.

Merry X-Mas and have a good day!

Best regards,

Robert

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Control: reassign -1 x2goserver

After giving this more thought, while the issue manifests itself on the client side, it is caused on the server side, so it belongs to the x2goserver package.

We should investigate if the scripts under

/etc/x2go/Xsession.d/

could be made to automatically disable compositing for the desktop environments we support, and what possible negative side effects might be (E.g. do we have to run a background task that re-enables compositing once the session ends? What happens if the user wants to run a local session and an X2Go session in parallel?).

For XFCE4, the file to add

/usr/bin/xfconf-query -c xfwm4 -p /general/use_compositing -s false

to would probably be

/etc/x2go/Xsession.d/55xfce4-session

But there are now several DEs that employ compositing, so the question is if we should add it to the existing, per-DE files, or create a new one that just tries to catch all compositors we know about?

Kind Regards, Stefan Baur

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