Hi Aurélien,
Thanks for your timely reply. Your answer is very detailed and useful
for me.
Let us stay posted. Thanks again.
Dandan
在 2025/7/21 下午7:50, Aurélien COUDERC 写道:
Le 21 juillet 2025 12:15:47 GMT+02:00, zhangdandan <zhangdan...@loongson.cn> a
écrit :
Hello Kde maintainers:
Hi Dandan,
these are interesting questions you are asking. Most of these should be
answered in the Debian KDE wiki article [1] but are unfortunately currently not
or with outdated answers.
Hopefully I'll find the time to update this for the Trixie release but really,
anyone feel free to beat me to it. 🙂
So let me answer here.
I have the following questions to confirm with you. Looking forward to your
reply.
For Debian 13 release, in the KDE Plasma 6 version:
Will Wayland be set as the default display protocol?
Yes, as was the case for Debian 12 / bookworm.
Is the Xorg display protocol supported (users can set xorg as default display
protocol themselves)?
Yes, you can choose between Plasma (Wayland) and Plasma (X11) sessions on the
SDDM login screen (or any display manager) from a default Plasma install of
Debian 13.
After setting the display protocol to Xorg in the sddm login screen, is it
possible for a kde application to cross-call the Wayland interface?
Not that I know of. But it doesn't matter because :
- as far as I'm concerned the Wayland session has been the better option for a
while now. It already has much better scaling, refresh rate, color management
and multi-screen support than the X11 session. Upstream KDE is transparently
tracking the remaining issues / lacking features with Wayland at [2].
- it shouldn't be needed because at least for those using a toolkit like Qt or
GTK the apps will detect if they're running in a Wayland session and will fall
back to their X11 implementation if needed. I haven't particularly looked at it
but I'm not aware of any prominent app that would be wayland-only so far.
For the next Debian 14 release:
Is the Wayland display protocol supported by default?
Is the Xorg display protocol retained, or is the xorg display protocol removed?
Future will tell, stay posted. 🙂
Debian 13 is just about to be released and 14 is years away.
We Debian follow where upstream KDE goes with this. One of KDE's leads, Nate
Graham, has recently posted an overview of where we stand, what's left to do
and some possible evolutions, you may want to have a look at his blog post [3].
TLDR is yes Xorg is on its way out and at some point the X11 session will go.
To the best of my knowledge Wayland was created and is maintained by former
Xorg developers and they are nearly exclusively working on the Wayland stack
these days since the Xorg protocol cannot be made to support our current
features and security requirements.
And it doesn't matter because xwayland supports running X11 apps in a Wayland
session and there is no plan to drop it.
The most useful thing to do by now is testing your workflows and applications
in a Wayland session to ensure that upstream projects are aware of any
remaining issues and can fix them until Xorg inevitably goes away.
[1] <https://wiki.debian.org/KDE>
[2] <https://community.kde.org/Plasma/Wayland_Known_Significant_Issues>
[3] <https://pointieststick.com/2025/06/21/about-plasmas-x11-session/>
Happy hacking,
--
Aurélien
