Bug 411682

I have the same issue with Firefox-nightly Wayland as said in my comment in this bug https://bugs.kde.org/show_bug.cgi?id=397834.

Operating System: Arch Linux 
KDE Plasma Version: 5.16.90
KDE Frameworks Version: 5.62.0
Qt Version: 5.14.0
Kernel Version: 5.3.6-arch1-1-ARCH
OS Type: 64-bit
AMD GPU

Please share your wl-clipboard commands you did which didn't work

wl-clipboard copy paste work fine here.

Closing till we get more info

(In reply to David Edmundson from comment #3)
> wl-clipboard copy paste work fine here.
> 
> Closing till we get more info

are you sure that you are using wayland backend for firefox? (you can check it 
in about:support)

I did set in "/etc/environment" the "export MOZ_ENABLE_WAYLAND=1" environment variable. With this I see in Firefox-nightly (webrender is enabled too) in about:support that the Window Protocol is set to Wayland. 
Copy and paste from any application to Firefox doesn't work, not even from Firefox to Firefox, only from Firefox to another application.

Start firefox with: MOZ_ENABLE_WAYLAND=1 firefox-developer-edition (i wrote that by hand because copy does not work)

Tests FF on wayland:

1. Copy from firefox to X11 app: works
2. Copy from firefox to wayland app: works

3. Copy from X11 app to firefox: not working
4. Copy from wayland app to firefox: not working

5. Copy from firefox and execute wl-paste in yakuake: works
6. Copy using "wl-copy test text" in yakuake: not working, wl-paste in terminal pastes copied text

Firefox 72.0b5

Ah, forgot:
kwin 5.17.4
qt 5.13.2
kde frameworks 5.64.0
nvidia blob 440.36

Also forgot:
1. Copy from firefox to firefox, same tab, same text field: now working

Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least
15 days. Please provide the requested information as soon as
possible and set the bug status as REPORTED. Due to regular bug
tracker maintenance, if the bug is still in NEEDSINFO status with
no change in 30 days the bug will be closed as RESOLVED > WORKSFORME
due to lack of needed information.

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I thought i shouldn't change status

This bug is the main reason why I cannot use Firefox on Wayland. Is this a bug of kwin or Firefox?

Tested with Firefox Nightly 2020-04-03, Plasma 5.18.4, KDE Frameworks 5.68, Qt 5.14.1.

I'm observing the same issue: copy works, past doesn't in wayland firefox in KDE.

Some more Info:
- The same issue appears also for wayland thunderbird in KDE.
- The issue does not show up in wayland firefox or thunderbird in gnome.
- The issue does not show up in other wayland GTK Apps I tested in KDE.
- The issue does not show up in wayland firefox or thunderbird in KDE on default dialogue windows such as the "safe page as..." dialogue or "Add files as attachment" dialogue (sorry, don't know the exact english translation of the window titles)

Same problem with Nightly 2020-04-10 on Wayland session. FF is start with MOZ_ENABLE_WAYLAND=1 environment variable.

Some tests:
1. copy/paste on docs.google.com: Works
2. copy/paste on bugs.kde.org: Not work
3. copy from docs.google.com, paste to terminal: Works
4. copy from bugs.kde.org, paste to terminal: Works
5. copy from terminal, paste to docs.google.com: Not work
6. copy from terminal, paste to bugs.kde.org: Not work

Firefox has multiple datadevices for the same surface (via multiple seats)

We only send to the first one.

Should be an easy fix now \o/
I did a quick hack and can now paste.

WIP: https://phabricator.kde.org/P599

This was fixed. 31ea954b4fcfa2873a89847b90f33b5599dfdb7a in kwayland-server