[Bug 520546] Re: Alt+KEY incorrectly behaves like Ctrl+Alt+KEY, and/or unwanted VT switch from Alt+Left/Right

[Mathieu L BOUCHARD]

Started experiencing this in Ubuntu 18.04 on two different computers,
since a few days ago, presumably because of a package upgrade ; both
users are using the Unity shell (if it makes any difference; I didn't
try another one) ; disabling those shortcuts is important because
Alt+arrow are very commonly used as Back/Forward in Chromium and
Firefox, whereas the virtual console feature is almost never used and
doesn't deserve more than just the usual Ctrl+Alt+Fn bindings. The
dumpkeys|grep|loadkeys hack works, but the problem is that it shouldn't
ever be needed.

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https://bugs.launchpad.net/bugs/520546

Title:
  Alt+KEY incorrectly behaves like Ctrl+Alt+KEY, and/or unwanted VT
  switch from Alt+Left/Right

Status in console-setup package in Ubuntu:
  In Progress
Status in linux package in Ubuntu:
  Confirmed
Status in xorg-server package in Ubuntu:
  Confirmed
Status in console-setup source package in Bionic:
  New
Status in linux source package in Bionic:
  New
Status in xorg-server source package in Bionic:
  New
Status in console-setup source package in Cosmic:
  New
Status in linux source package in Cosmic:
  New
Status in xorg-server source package in Cosmic:
  New
Status in console-setup source package in Disco:
  In Progress
Status in linux source package in Disco:
  Confirmed
Status in xorg-server source package in Disco:
  Confirmed
Status in console-setup source package in Eoan:
  New
Status in linux source package in Eoan:
  New
Status in xorg-server source package in Eoan:
  New

Bug description:
  WORKAROUND:

  sudo kbd_mode -s

  ORIGINAL DESCRIPTION:

  I'm running Ubuntu Lucid development branch.

  Pressing alt-f2 switches the screen to the second virtual terminal.
  Alt-f3 does the same to the third and so on. I expected alt-f2 to open
  the run dialog.

  I'm pretty sure that my keyboard is not malfunctioning as I can use
  all my applications normally. (Pressing O and Ctrl-O do not have the
  same effect.)

  I'm not sure which package I should file this bug against. I'll
  happily do an apport-collect once I know.

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