Text copying stops working

[DaarkWel]

Text copying in chat window and in roster too stops working after some time. Not CTRL-C, not right mouse menu «Copy» doesn't work until restart Psi+. In terminal there's this message: W:QXcbClipboard::setMimeData: Cannot set X11 selection owner (unknown:0, unknown).

Linux x64 Psi+ v1.4.460 (2018-12-12, Psi:9803b48e, Psi+:2c6f671) Qt version 5.12.0.

[beelze]

I've got similar issue some time ago (though copying just not working at all anywhere inside Psi). Rebuilding qtgui (same 5.11) fixed it.

[DaarkWel]

I don't have separate qtgui package in my archlinux. qt5-base has updated from 5.11 when I first time did notice this bug to 5.12. I tried to rebuild psi+ itself several times with no luck :-(

[beelze]

can you revert qt то 5.11 and check for this issue?

[DaarkWel]

Sorry for my vague comment. I was on 5.11 when I first saw this issue.

[DaarkWel]

Several months and several versions later, the problem still persist.

[tehnick]

Try another Qt Theme.

[DaarkWel]

Ok, I will. But why?

[beelze]

Setting another theme/style didn't help as I stated before. At least -style windows. I've tried gtk+ and adwaita too but it's the same. Relevant message is:

W:QXcbClipboard::setMimeData: Cannot set X11 selection owner (unknown:0, unknown)

[DaarkWel]

Yep, it didn't help. Same message.

[tehnick]

Try another Qt Theme.

Ok, I will. But why?

We had discussed the same bug report in our developers groupchat few months ago. Unfortunately, I do not remember what is helped user finally. But I remember that we discussed a lot about Qt styles.

Probably you know, what unlike GTK+ 3.x themes, which may change only look and feel of UI via CSS and such like, Qt themes (styles) may significantly change behaviour of Qt widgets. And this is especially important in GTK+ based DE, where where is no standard way in Qt application to mimic to GTK+ ones after switching to GTK+ 3.x.. (You may google about gtkplatform, gtk-qt-engine, qgtkstyle, QGnomePlatform, Qt5Gtk2, etc..)

That is it why the Qt theme is the first thing which come to mind when I read such bug reports.

[tehnick]

BTW, which DE do you use? Is it launched above X11 or Wayland? Which input library do you use?

[tehnick]

Which input library do you use?

As far as I see, you use Arch Linux and I suppose that it switched to libinput long time ago. Which version of libinput is installed in your system now?

[beelze]

After some thorough testing, neither evdev/libinput switching nor using different Qt styles didn't help. Sometimes copying stops almost immediately, sometimes after a whole day, but in the end the result always the same. Other Qt programs affected too, including qpfdview.

Another thing I noticed that W:QXcbClipboard::setMimeData error appeared not only when copying text but even on selecting it. Why? Can we turn off copying-on-select or whatever it called?

W:QObject::startTimer: Timers cannot have negative intervals (unknown:0, unknown) almost always appears around setMimeData error. It may be revevant.

[DaarkWel]

BTW, which DE do you use?

It's just WM Openbox above X11.

Which version of libinput is installed in your system now?

It was about 1.12.4 when I first noticed this issue and it's 1.13.1 now.

Sometimes copying stops almost immediately, sometimes after a whole day, but in the end the result always the same.

Same here.

Other Qt programs affected too, including qpfdview.

Yes, I noticed it just yesterday, in my case it was GoldenDict.

W:QObject::startTimer: Timers cannot have negative intervals (unknown:0, unknown)

I didn't see that error.

[Vitozz]

Any news? Should we close this issue?

[DaarkWel]

Any news? Should we close this issue?

I guess it's basic QT issue for it affects not only psi-plus but other QT apps, in my case Telegram-desktop and goldendict. It still persist and it's freakin' annoying. But you can close this issue here, I think. Thanks for trying.