https://bugzilla.redhat.com/show_bug.cgi?id=1134299

--- Comment #2 from Mike FABIAN mfabian@redhat.com --- 　I can also reproduce this on f20.

$ gsettings get org.gnome.desktop.input-sources xkb-options ['terminate:ctrl_alt_bksp', '', 'eurosign:5', 'grp:rctrl_rshift_toggle']

I have Super+Space set as the switch to next input source and (just as the reporter) RightCtrl+RightShift as the modifier only input source switch.

I can now use *all* of the following key combinations to switch input sources:

RightCtrl+RightShift LeftCtrl+RightShift LeftAlt+RightShift LeftShift+RightShift

https://bugzilla.redhat.com/show_bug.cgi?id=1134299

--- Comment #4 from Mike FABIAN mfabian@redhat.com --- Rui Matos also told me that LeftAlt+RightShift does not switch (only the other 3 combinations mentioned in comment#2 switch).

I tried again and Rui is right.

The reason why I thought that LeftAlt+RigthShift does switch input sources is that switching the input source to “gucharmap” unexpectedly remapped my keyboard layout (probably to “us”). This changed the position of the left alt key (My own layout has the left alt key on the left control key and the left alt key is "Meta" (for use in Emacs)). Switching to the "gucharmap" input source mapped the left alt key to its usual position and the left control key became control again. So it was LeftCtrl+RightShift again doing the input source switching, *not* LeftAlt+RightShift.

https://bugzilla.redhat.com/show_bug.cgi?id=1134299

Rui Matos rmatos@redhat.com changed:

What |Removed |Added ---------------------------------------------------------------------------- CC| |rmatos@redhat.com

--- Comment #6 from Rui Matos rmatos@redhat.com --- (In reply to Stas Sergeev from comment #5)

(In reply to Mike FABIAN from comment #3)

...

Rui Matos told me in IRC that this is an X server problem, it has nothing to do with Gnome.

What does this mean to a poor user?

It means that it won't be fixed until we switch to wayland. In any case, this is a fairly low priority bug, there's much bigger fish to fry out there.

https://bugzilla.redhat.com/show_bug.cgi?id=1134299

--- Comment #8 from Fedora End Of Life endoflife@fedoraproject.org --- This message is a reminder that Fedora 21 is nearing its end of life. Approximately 4 (four) weeks from now Fedora will stop maintaining and issuing updates for Fedora 21. It is Fedora's policy to close all bug reports from releases that are no longer maintained. At that time this bug will be closed as EOL if it remains open with a Fedora 'version' of '21'.

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Although we aim to fix as many bugs as possible during every release's lifetime, sometimes those efforts are overtaken by events. Often a more recent Fedora release includes newer upstream software that fixes bugs or makes them obsolete.

https://bugzilla.redhat.com/show_bug.cgi?id=1134299

Fedora End Of Life jkurik@fedoraproject.org changed:

What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |CLOSED Resolution|--- |EOL Last Closed| |2016-07-19 08:04:00

--- Comment #9 from Fedora End Of Life jkurik@fedoraproject.org --- Fedora 22 changed to end-of-life (EOL) status on 2016-07-19. Fedora 22 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug.

If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. If you are unable to reopen this bug, please file a new report against the current release. If you experience problems, please add a comment to this bug.

Thank you for reporting this bug and we are sorry it could not be fixed.

https://bugzilla.redhat.com/show_bug.cgi?id=1134299

Bastien Nocera bnocera@redhat.com changed:

What |Removed |Added ---------------------------------------------------------------------------- CC|bnocera@redhat.com | Assignee|bnocera@redhat.com |rmatos@redhat.com

https://bugzilla.redhat.com/show_bug.cgi?id=1134299

Stas Sergeev stsp@list.ru changed:

What |Removed |Added ---------------------------------------------------------------------------- Version|24 |25

https://bugzilla.redhat.com/show_bug.cgi?id=1134299

Stas Sergeev stsp@list.ru changed:

What |Removed |Added ---------------------------------------------------------------------------- Version|25 |26

https://bugzilla.redhat.com/show_bug.cgi?id=1134299

--- Comment #13 from Olivier Fourdan ofourdan@redhat.com --- (In reply to fujiwara from comment #12)

I guess this problem happens in GNOME Wayland too because both X11 and Wayland use the same mutter logic.

I think you're right, mutter doesn't distinguish between left/right modifiers in its keybindings code:

https://git.gnome.org/browse/mutter/tree/src/core/keybindings.c#n490

491 else if (g_str_equal (iso_next_group_option, "ctrl_shift_toggle") || 492 g_str_equal (iso_next_group_option, "lctrl_lshift_toggle") || 493 g_str_equal (iso_next_group_option, "rctrl_rshift_toggle")) 494 { 495 resolved_key_combo_copy (&keys->iso_next_group_combo[0], 496 &keys->iso_next_group_combo[1]); 497 498 keys->iso_next_group_combo[0].mask = ShiftMask; 499 keys->iso_next_group_combo[1].mask = ControlMask; 500 keys->n_iso_next_group_combos = 2; 501 }

[...]

511 else if (g_str_equal (iso_next_group_option, "alt_shift_toggle") || 512 g_str_equal (iso_next_group_option, "lalt_lshift_toggle")) 513 { 514 resolved_key_combo_copy (&keys->iso_next_group_combo[0], 515 &keys->iso_next_group_combo[1]); 516 517 keys->iso_next_group_combo[0].mask = Mod1Mask; 518 keys->iso_next_group_combo[1].mask = ShiftMask; 519 keys->n_iso_next_group_combos = 2; 520 }

So basically, it just checks for the modifier mask (which is not different for left and right)

https://bugzilla.redhat.com/show_bug.cgi?id=1134299

Jens Petersen petersen@redhat.com changed:

What |Removed |Added ---------------------------------------------------------------------------- CC| |stsp@list.ru Flags| |needinfo?(stsp@list.ru)

--- Comment #15 from Jens Petersen petersen@redhat.com --- Still happens with F27+ presumably?

https://bugzilla.redhat.com/show_bug.cgi?id=1134299

--- Comment #17 from Stas Sergeev stsp@list.ru --- (In reply to Jens Petersen from comment #15)

Still happens with F27+ presumably?

True.

https://bugzilla.redhat.com/show_bug.cgi?id=1134299

Bugzilla account termination pnt-expunge@redhat.com changed:

What |Removed |Added ---------------------------------------------------------------------------- Assignee|rmatos@redhat.com |tiagomatos@gmail.com

https://bugzilla.redhat.com/show_bug.cgi?id=1134299

Satyabrata Maitra smaitra@redhat.com changed:

What |Removed |Added ---------------------------------------------------------------------------- Blocks| |1626995

https://bugzilla.redhat.com/show_bug.cgi?id=1134299

Stas Sergeev stsp@list.ru changed:

What |Removed |Added ---------------------------------------------------------------------------- Version|27 |29