Re: F34 Change proposal: Wayland by Default for KDE Plasma Desktop (System-Wide Change)

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On 12/29/20 11:26 PM, Samuel Sieb wrote:

More likely what you're really confused about is something that a lot of people are not aware of.  Wayland is a protocol, not a program.  I believe there's a library, but the final implementation is done in each window manager.  The X11 "emulation" is a program called XWayland that provides an interface layer between the X11 calls and whatever Wayland implementation is currently running.

Thanks for clarifying; indeed it's the XWayland process that crashes.

I actually support leaving X11 behind---I use wayland myself and I agree it's the correct evolutionary path for system graphics.

I piped up in this discussion to point out that Wayland has rough spots.  There are many legacy X11 apps still around, some possibly buggy. They should not crash XWayland in a way that nukes the entire desktop.

Another problem is the reliability of input streams. The mouse behavior is realy weird sometimes, as if it was simultaneously losing events and getting spurious ones.

I suspect that these issues are marginal enough to not affect the majority of users, which is why they aren't seen as urgent, but I think they should be addressed for a mainstream Wayland use. I would like to help debugging that, but it's a complex system and I wasn't able to find reliable information on how to look inside those issues. For instance, I understand the separation of layers in X11, and I know how to debug X11 events using xev and such---but I have no idea how to look into why my mouse clicks in Firefox under Wayland are so weird and unpredictable.
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