375000 2017-01-13 10:27:53 +0000 Meta-to-open-menu stops working quickly after reboot on specific keyboard model 2018-03-09 14:31:50 +0000 1 1 4 Plasma kwin input git master Other Linux RESOLVED WORKSFORME NOR normal --- 0 subdiff kwin-bugs-null bp1994 flo.hennig notuxius 0 oldest_to_newest 1653996 0 subdiff 2017-01-13 10:27:53 +0000 I have this problem only with my Logitech K360 keyboard. It is connected together with a mouse to one unifying receiver. After reboot the meta key opens the Application Launcher as intended. But after some time (maybe a minute, maybe more, less than an hour), it stops working. I couldn't yet pinpoint the issue any further. 1654116 1 subdiff 2017-01-13 19:09:05 +0000 OK, I pinpointed it now: The Meta key stops working directly after first time hitting Alt+Tab to open the Window Switcher / Tabbox. 1654143 2 mgraesslin 2017-01-13 22:06:16 +0000 Interesting, I'm wondering whether alt changes the modifier somehow. What's your keyboard layout? 1654145 3 mgraesslin 2017-01-13 22:06:59 +0000 Btw X11 or Wayland or both? 1654402 4 subdiff 2017-01-15 11:29:58 +0000 Problem only on X11. 1654418 5 mgraesslin 2017-01-15 13:48:04 +0000 good, that should make investigation easier. Try to use xev to see which key events are generated. My theory is that there is a mismatch. That the logitech somehow generates multiple press events which are then not matched by a release. Or that somehow the keygrab steals events, but that wouldn't make any sense. 1654678 6 subdiff 2017-01-16 16:37:46 +0000 There is no difference in the output of xev: Before Alt+Tab (i.e. Meta works): KeyPress event, serial 40, synthetic NO, window 0x4600001, root 0x4e9, subw 0x0, time 30763207, (961,1097), root:(3189,1138), state 0x10, keycode 133 (keysym 0xffeb, Super_L), same_screen YES, XLookupString gives 0 bytes: XmbLookupString gives 0 bytes: XFilterEvent returns: False KeyRelease event, serial 40, synthetic NO, window 0x4600001, root 0x4e9, subw 0x0, time 30763409, (961,1097), root:(3189,1138), state 0x50, keycode 133 (keysym 0xffeb, Super_L), same_screen YES, XLookupString gives 0 bytes: XFilterEvent returns: False After Alt+Tab (i.e. Meta works not): KeyPress event, serial 40, synthetic NO, window 0x4600001, root 0x4e9, subw 0x0, time 30773771, (961,1097), root:(3189,1138), state 0x10, keycode 133 (keysym 0xffeb, Super_L), same_screen YES, XLookupString gives 0 bytes: XmbLookupString gives 0 bytes: XFilterEvent returns: False KeyRelease event, serial 40, synthetic NO, window 0x4600001, root 0x4e9, subw 0x0, time 30773991, (961,1097), root:(3189,1138), state 0x50, keycode 133 (keysym 0xffeb, Super_L), same_screen YES, XLookupString gives 0 bytes: XFilterEvent returns: False Also when I kill kwin in running session and then start it again, problem is gone until I press the next time Alt+Tab. 1654683 7 mgraesslin 2017-01-16 16:53:46 +0000 what is xev showing for "Alt+Tab"? 1654698 8 subdiff 2017-01-16 17:46:37 +0000 See https://phabricator.kde.org/D4164 for my latest findings. 1655517 9 cfeck 2017-01-19 17:06:29 +0000 Duplicate of bug 370920? 1655722 10 subdiff 2017-01-20 19:20:07 +0000 Damn, I forgot about that one (although I created it^^). But, nope, they are independent. 1670563 11 bp1994 2017-04-09 15:38:35 +0000 I have a similar issue, Meta key stops working some time after booting, but I have a different keyboard (CM Storm QuickFire Ultimate), and I don't use Alt-Tab. Could this be related? 1690178 12 mgraesslin 2017-07-22 12:47:15 +0000 What's the state of this? Did we fix it? 1690580 13 subdiff 2017-07-24 09:15:58 +0000 Haven't noticed it for a while. So I close the bug for now. 1718340 14 flo.hennig 2017-12-24 06:02:03 +0000 I think this is still relevant on the latest version of the plasmashell (KDE Neon user edition, 5.11.4). Starting Computer, super key works fine (toggles Menu) After a while: nothing happens when pressing the super key. Restart kwin (killall kwin_x11 && kstart5 kwin_x11): Super key is working again. In my tests it had nothing to do with the Alt+Tab shortcut. 1736817 15 notuxius 2018-03-09 14:31:50 +0000 Possibly related bugs https://bugs.kde.org/show_bug.cgi?id=390858 and https://bugs.kde.org/show_bug.cgi?id=370920