Hi there,

I'm having a really strange problem: The keyboard shortcuts Ctrl+C (for Copy) and Ctrl+X for cut don't work anymore in kwrite (or rather the KDE text component as it doesn't work in kate either).

When I press Ctrl+C nothing is copied to the clipboard. Consequently, when I press Ctrl+V some old clipboard content is pasted (or nothing if the clipboard was empty). Nothing shows up in klipper's history either.

Ctrl+X is even more weird: When I press Ctrl+X the selected text is actually cut from the document, but it's not copied to the clipboard (so the text would be completely gone after pressing Ctrl+X if it wasn't for the "Undo" function).

If I don't use shortcuts but rather right-click on the text and select "Cut" or "Copy" from the menu, everything works fine.

I already tried resetting all shortcut-related settings to their defaults but that didn't help. Either way, the shortcuts seem to be working, since pressing Ctrl+X actually does something (though it's not working correctly).

Any ideas what could be wrong here?

If you have Klipper running, have you tried closing it?

Klipper in fact seemed to be the culprit. After resetting (removing) klipper's configuration the issue is gone.

As I'm having this issue on two machines I have to check whether this "fix" works on the other machine as well.

Thank you very much for this hint.

Isn't it strange though, that only KDE applications were affected, while copy/paste worked fine in GTK apps (e.g. firefox)?

EDIT: Okay, resetting klipper config fixes this issue.

Unfortunately the issue has reappeared after just a short while.

It happens on two machines and one of them runs KDE 4.4.5 (stable) while the other runs KDE 4.5 RC 2.

After a while Ctrl+C/X just stop working, but only for Qt4 applications. I also tried with some non-kde Qt4 apps and it didn't work there either.

Copy/Paste in gtk apps works as usual and copied strings show up in klipper as normal.

Copy/Paste in Qt4 apps only works when using the context menu but not by pressing Ctrl+C or Ctrl+X.

Everything works as soon as I close klipper, but of course I don't get the nice clipboard history then.

I can live with disabling klipper for now, but it's really strange.

Please file a bug aganist Klipper at bugs.kde.org if one does not already exist, so that this can be fixed.

Actually I just noticed, that even without klipper it's not working correctly:

I can cut/copy text with Ctrl+X or Ctrl+C but then I can only paste it into the same window.

For example in kwrite, I can cut some text and paste it somewhere else in the same document.
I cannot paste the copied text into another application or even another kwrite window!

The problem seems to be with copying, not with pasting. I can not copy from a Qt to a Gtk application, but the other direction works (always).

Copying from a Qt application into another app only works by right-clicking.

When klipper is running not even pasting into the same application works.

EDIT: Just tried, and everything works with a clean user account (i.e. no user specific settings).

I might have no other chance than to reset my whole kde and Qt configuration. Still, there is no guarantee that the error won't reappear.

The files ~/.kde4/share/config/kdeglobals or ~/.config/Trolltech.conf are likely the ones at fault. Can you try removing them?

Unfortunately, removing these files messses up fonts and colors, but does not fix the issue.

If you use any keyboard layouts, try removing "keyboardrc" ( from ~/.kde4/share/config ) then logout and back in again.

I just can't get rid of this problem:

I removed the whole ~/.kde4 directory and Trolltech.conf.

After a few logins the problem is back.

Copy-paste into the same window works when klipper is disabled. Copying across windows only works by right-clicking.

Are there other Qt-specific config files that might be interfering?

Unfortunately i'm out of ideas at this point...

Unfortunately upgrading to KDE 4.5 (release) has changed nothing. I still can't use Ctrl+C / Ctrl+V in KDE applications.

Am I really the only one having this problem?

EDIT: And still, even removing the complete ~/.kde4 directory and Trolltech.conf does not help!

Have you tried a completely new user?

Ah, I think I've found the cause for the bug (how come I didn't think of this earlier? ).

I had been using the ibus input method (http://code.google.com/p/ibus/) to be able to input Japanese.

Apparently it has issues with Qt applications. Since I disabled ibus my shortcuts are working again.

I removed these entries from my ~/.xprofile:

Code: Select all

export XMODIFIERS=@im=ibus
export GTK_IM_MODULE="ibus"
export QT_IM_MODULE="ibus"


Now that I know the cause, where should I file a bug report? Qt, KDE or the ibus project?

This should be filed with the ibus project.