Version: 17.12.3, Frameworks 5.44.0, Qt 5.10.1 Windowing system: wayland This bug occurs only on wayland session. Steps to reproduce: Install `kbd` package to acquire `showkey` command line. Open konsole and execute `showkey -a` $ showkey -a Press Ctrl-/ / 47 0057 0x2f Compare to xterm output Press Ctrl-/ ^_ 31 0037 0x1f urxvt output Ctrl-/ ^_ 31 0037 0x1f gnome-terminal output Ctrl-/ ^_ 31 0037 0x1f Ctrl-/ is one of Undo keys on emacs, see emacs tutorial.
Ctrl+/ work in Emacs Ctrl+/ sends '/ 47 0057 0x2f' signal into the Konsole and '^_ 31 0037 0x1f' into the others mentioned terminals emacs 25.3-3 Plasma: 5.12.4 Apps: 17.12.3 Frameworks: 5.45.0 Qt: 5.10.1 Kernel: 4.14.34-1-MANJARO OS: Netrunner Rolling Video: Intel 4400 Driver: xf86-video-intel 1:2.99.917+823+gd9bf46e4-1 Screen: 1600x900 wayland-protocols 1.13-1 wayland 1.14.0-1
Still present in 18.04 This may be related to incomplete fix of bug 336638 Anyway, Ctrl modifier is ignored for both '/' and '?' keys.
An easy way to reproduce this: In konsole execute `emacs -Q -nw` and hit `C-/`. You will see a / appearing on the last line of the buffer. Run `emacs -Q` (this will NOT run emacs in a terminal and open a GUI window instead) and hit `C-/`. You should see how the buffer goes empty and a text "Undo!" at minibuffer (status line at the bottom of the window). This is the desired behavior.
This appears fixed in current konsole, I can open emacs terminal editor and Ctrl / runs the undo command. Can you please confirm this behaviour is also observed so we can close this bug, thanks.
As somebody who suffered from this, I can confirm that the issue seems to be fixed now. Konsole 20.08.1 KDE Frameworks 5.75.0 Qt 5.15.1 (built against 5.15.1) KWin 5.20.2 running on wayland