[Bug 1762952] Re: Alternative shortcut for layout switching Alt+Shift unexpectedly set by default

[Gunnar Hjalmarsson]

Thanks for looking, Łukasz.

Right, it didn't build in PPA for me without those. As regards
'locales', according to the build log it looked for and failed to find
/usr/share/i18n/charmaps. As regards the extra install directory in
d/rules, it's obviously needed if the conditions for running the
subsequent commands are satisfied. Can't explain why it differs from the
archive uploads. I just run "debuild -S" and dput'ed (not from a clean
chroot, though).

I think that $1 is always "configure" at the execution of postinst.
Please note that the original code checks for precisely that. I
struggled a bit to find a way to check whether we are upgrading, and the
proposed way proved to work when I tested. But I'm not a Debian
packaging wizard, and would be just as happy if there is a simpler way
to check for it.

Actually, the fact that keyboard-configuration and g-c-c both write to
/etc/default/keyboard, while they have different ideas of what it should
contain, appears to be a bit odd. My proposal only addresses the most
obvious issue as reported in this bug, i.e. it prevents the keyboard
configuration from being changed without the user having asked for it.

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https://bugs.launchpad.net/bugs/1762952

Title:
  Alternative shortcut for layout switching Alt+Shift unexpectedly set
  by default

Status in console-setup package in Ubuntu:
  In Progress
Status in gnome-control-center package in Ubuntu:
  Confirmed

Bug description:
  Version: Ubuntu 18.04 Final Beta with default Gnome Shell included in
  18.04

  Steps to reproduce:
  1. Define two keyboard input methods in Settings -> Region & Language -> Input Sources
  2. Open several applications
  3. Observe that application windows can be iterated with Alt + Tab
  4. Once application window iteration was begun with Alt + Tab, try to iterate backwards with Alt + Shift + Tab.
  5. Try to change keyboard input method switching hotkeys in Settings -> Region & Language -> Input Sources -> Options.
  6. Observe that Keyboard shortcut for "Alternative switch to next source" is set to "Alt + Shift" and that keyboard shortcuts can only be changed in Settings -> Devices -> Keyboard -> Keyboard Shortcuts.
  7. Observe that the shortcut for "Alternative switch to next source" is not available for configuration in Settings -> Devices -> Keyboard -> Keyboard Shortcuts.

  Actual state:
  * Performing step 4 does not select the previous app in application switcher but instead changes  keyboard input method.

  Expected state:
  * The shortcut for "Alternative switch to next source" can be changed and / or deactivated in Settings -> Devices -> Keyboard -> Keyboard Shortcuts.

  Notes:
  * The above was working fine in Ubuntu 17.10. I assume "Alternative switch to next source" did not exist in that version of Gnome Shell.

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