Here's a screenshot of the seemingly relevant settings.
Alt+Tab (Forward) works; Alt+Shift+Tab (Reverse) does nothing.
Any suggestions for a fix or where exactly I should direct a bug report?
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1Bugs can be filed here. I actually find people there quite unresponsive. The forum, however, is very helpful, if you get nothing useful here.– SparhawkMar 20, 2018 at 9:16
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thanks. would mark correct if it were an answer– Nathan SmithMar 29, 2018 at 23:36
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Good point. I should have read your question more thoroughly. I've changed it into an answer.– SparhawkMar 30, 2018 at 0:22
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I confirm the bug is present in Kubuntu 16.04 and 18.04– trig-gerSep 9, 2018 at 19:18
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3 Answers
It looks like the reason is that Alt+Shift+Tab translates to Alt+Shift which switches the keyboard layout and consecutive Alt+Tab which traverses the opened applications in the non-reversed order. I think this is a bug and it is really uncomfortable for anyone with more than one keyboard layout.
It looks this is an old bug which was fixed
However in Kubuntu 18.04 it appears again.
09:40:05:~$ plasmashell --version
plasmashell 5.12.6
09:40:10:~$ kf5-config --version
Qt: 5.9.5
KDE Frameworks: 5.44.0
kf5-config: 1.0
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1Thanks. I don't think that could be my issue though because I only have 1 keyboard layout & Alt + Shift doesn't seem to be an enabled shortcut for it. Under Input Devices> Keyboard Hardware & Layout, I found an option to use Alt + Shift that way, but it's not selected. However, under Misc. I see something about handling Ctrl & Alt special keys in a server, so I will try that one & report back if it works Jul 11, 2018 at 19:52
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I set the handle ctrl & alt keys in server option & clicked restore to defaults in window switcher settings. No immediate change. But upon restart it finally works. (sorry for ambiguity on which solved it) Jul 15, 2018 at 7:16
It's indeed considered a somewhat "bug"-ish, yet it also depends on the perspective...
Meanwhile, however, just in case, have you tried: CtrlAltTab instead of AltShiftTab?
It may be a temporary workaround if AltShift is set in Xorg for layout switching/toggling (i.e. grp:alt_shift_toggle) and considering the following:
- 2018-02-28 - Alt+Shift+Backtab for reverse task switching?;
- 2018-04-10 - Bug 392961 on bugs.kde.org;
- 2003-06-03 - Bug 59303 on bugs.kde.org;
- 2004-07-14 - Bug 865 on bugs.freedesktop.org.
The X server does not know about any shortcuts -- shortcuts are the domain of the desktop environment. Maybe in Windows layout-switching and shortcut-recognition happen in the same component, so it can hold off switching layouts until Shift and/or Alt is released to see if maybe another key will be pressed. But in X, layout switching happens in the server, and as soon as the switching combo is seen, the layout is switched and the combo is dropped.
Source: GitLab (freedesktop.org)
For example:
It depends on the current shortcuts and may indeed appear non-comfortable enough (subjective...), yet the wonderful Ctrl key is near Shift on the most of the keyboards and may have been waiting all this time just for you! ^^
