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I'm using VNC to access an Ubuntu 16.04 laptop (running Desktop Sharing) from a Windows 10 desktop (running Ultra VNC Viewer). My problem: some keyboard combos don't travel well; for example, pressing Shift+Ctrl+Tab is processed on the server as Ctrl+Tab.

The problem persists when using a different VNC client, for example MobaXTerm, so the issue seems to be on the Ubuntu side. How can I solve this? Thanks.

4
  • Does the shift key work on the windows 10 system? Does using either right or left shift change it?
    – ianorlin
    Oct 20, 2016 at 22:37
  • Both Shift keys work on the Win10 desktop, but in both cases, sending Shift+Tab gets interpreted as Tab. Other combos, like Shift+Ctrl+F work (Search Backwards, in Terminal), so the problem may be limited to Shift+Tab. (Shift+Tabworks correctly from the Linux laptop's physical keyboard.)
    – UTAN_dev
    Oct 23, 2016 at 12:41
  • I have the same problem. Feb 23, 2017 at 8:47
  • @UTAN_dev Ubuntu physical laptop keyboard - Ubuntu remote desktop - same problem, so that is not true.
    – jave.web
    Mar 15, 2020 at 13:34

1 Answer 1

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Instruction from this (2009) thread solved the issue for me: https://bugzilla.gnome.org/show_bug.cgi?id=353304#c21

Solution: Run in Ubuntu terminal: xmodmap -e 'keycode 23 = Tab'

EDIT: to make the fix permanent (for 18.04) run sudo vim /usr/share/X11/xkb/symbols/pc and change the line

key <TAB> { [ Tab, ISO_Left_Tab ] };

to

key <TAB> { [ Tab ] };

After that reboot.

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  • You run the command on remote, just to be clear, tested, works on remote Ubuntu 20.04
    – jave.web
    Mar 2, 2022 at 4:39

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