Comment 7 for bug 1712200

I have just made a clean installation of Ubuntu.

artful64@artful64:~$ head /etc/apt/sources.list -n2
#deb cdrom:[Ubuntu 17.10 _Artful Aardvark_ - Release amd64 (20171018)]/ artful main restricted

During installation I set Russian keyboard layout.
On first login I launched Firefox and accidentally pressed <Alt+Shift>. And it switched the layout. Of course <Super+Space> works too.

But Firefox distracts me if I press <Alt+Shift>. So you have set <Alt+Shift> as layout switcher quietly in Ubiquity (see bug 1242572).

artful64@artful64:~$ cat /etc/os-release
NAME="Ubuntu"
VERSION="17.10 (Artful Aardvark)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 17.10"
VERSION_ID="17.10"
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
VERSION_CODENAME=artful
UBUNTU_CODENAME=artful
artful64@artful64:~$ cat /etc/default/keyboard
# KEYBOARD CONFIGURATION FILE

# Consult the keyboard(5) manual page.

XKBMODEL="pc105"
XKBLAYOUT="us,ru"
XKBVARIANT=","
XKBOPTIONS="grp:alt_shift_toggle,grp_led:scroll"

BACKSPACE="guess"
artful64@artful64:~$

It seems that this is severe bug.