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i did some basic tweak for supressing the Wayland Display, but could not set to x11.

Can someone post how i can disable Wayland and continue on X11 i haev some apps that dont support Wayland.

For example wmctrl and onboard don't work for me with Wayland. So if you really need one of these or some other tool, that needs x11, then I suggest that you try with Lubuntu or Xubuntu or some other flavor of Ubuntu, that is still using x11. You can try these flavors live (booted from USB without installing) before you decide what to use. But several tools work with Wayland now, and there are might be alternatives for some of your old favorites, alternatives that work in Wayland.

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    "some apps that dont support Wayland": Which? Ubuntu has Xwayland, which makes Wayland pretend to be X11 to those apps Commented yesterday
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    @DanielT: For example wmctrl and onboard don't work for me with Wayland. So if you really need one of these or some other tool, that needs x11, then I suggest that you try with Lubuntu or Xubuntu or some other flavor of Ubuntu, that is still using x11. You can try these flavors live (booted from USB without installing) before you decide what to use. But several tools work with Wayland now, and there are might be alternatives for some of your old favorites, alternatives that work in Wayland. Commented 20 hours ago
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    @DavidDE, I don't think you should copy my comment into the question, because it is an explanation and a suggestion, not part of the original poster's question. It would be better to put it into a new answer (I did not bother to create an answer, but you can do it and copy from my comment into it). Commented 1 hour ago

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Reset to default
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The default Desktop Environment in Ubuntu is GNOME; 26.04 comes with GNOME 50 which dropped X11 support. Only Xwayland is supported to run X11 applications.

You would need to install some other DE that sill supports X11 (like Xfce) or use some other Ubuntu flavor that defaults to a different DE like Xubuntu.

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There is no need to disable Wayland.

XWayland is automatically installed on Ubuntu 26.04 LTS This allows users to run legacy X11 applications even though the default session is now Wayland.

Simply install any X11 applications you need. XWayland will automatically handle their compatibility with the Wayland environment.

No additional setup is required beyond installing your X11 applications.

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