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I have new Ubuntu 18.04 with Gnome 3.28.1 on my laptop, and I run into a problem.

I have set Alt+Shift on keyboard layout switching, but LeftShift+RightShift combo also triggers the switching, and I just can't find out why.

I have used gnome-tweak-tool for the configuring, and I can guarantee that there is no ticks on the checkbox Both Shifts together. As for built-in Settings -> Devices -> Keyboard -> Typing, they have been set to Disabled and therefore can't interfere.

Also, I checked org/gnome/desktop/input-sources via dconf-editor, and it shows grp:alt_shift_toggle as it should, there is no mention of grp:shifts_toggle at all. But it still switches a layout, and it just makes me mad. Can anyone help me? Is it a bug or something?

P.S. However, if I disable Alt-Shift as a layout-switcher, LeftShift+RightShift also disappears, so it seems grp:shifts_toggle is a sort of "backup value" or "repeater" of grp:alt_shift_toggle.

P.P.S There are some links where people had encountered with the same, but no solution was found.

https://www.reddit.com/r/gnome/comments/73k5lq/why_pressing_leftshiftrightshift_changes_keyboard/

https://bbs.archlinux.org/viewtopic.php?id=174715

graham
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Scarabyte
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  • I see the same. But how is it a problem? I suppose that you rarely press both the shift keys accidentally. Anyway, maybe the grp:lalt_lshift_toggle option is what you prefer. – Gunnar Hjalmarsson Jun 16 '18 at 22:36
  • Thank you, but LeftAlt+LeftShift is only a half-way solution. It really disables LeftShit+RightShift, but RightShift+LeftShift still switches the layout, which is unwanted behaviour too. – Scarabyte Jun 18 '18 at 07:56
  • As for the rarity, it's not very uncommon to press both shifts together, if you do fast 10-fingers touch typing. You see, if you type something in capital letters, and don't use CapsLock for it (as i do for single capital words), you will need to alternate between LeftShift and RightShift very fast, depending on which letter key you need to press right now. And sometimes, RightShift is not unpressed yet, while LeftShift is already pressed, causing layout switching in the middle of word you trying to type. – Scarabyte Jun 18 '18 at 07:57
  • + is the default shortcut for switching input source. Maybe try that then? – Gunnar Hjalmarsson Jun 18 '18 at 08:19

1 Answers1

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I couldn't disable the LeftShift+RightShift shortcut anywhere, and at the end I decided to switch to Wayland as a replacement to Xorg. If you are using GNOME3 with GDM, change GDM settings in /etc/gdm/custom.conf, and choose Wayland instead of Xorg.

Muhamad Azmy
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  • Someone should clarify this answer. The missing detail for GDM settings may be the reverse of this answer, which I am not sure since I do not use GNOME. –  Feb 19 '19 at 16:23
  • Nevermind, this answer is wrong, I thought it actually fixed the issue, but then realized it didn't. Apparently pressing RShift first then press LShift (while holding RShift) will switch the layout, while the reverse will not (LShift then RShift). I still can't figure out how to prevent this combo from changing the layout – Muhamad Azmy Feb 20 '19 at 14:35