The issue has been resolved in my case after manual correction of /etc/X11/xorg.conf as shown below:
ORIGINAL: Section "InputDevice" Identifier "Generic Keyboard" Driver "kbd" Option "CoreKeyboard" Option "XkbRules" "xorg" Option "XkbModel" "pc105" Option "XkbLayout" "us" EndSection
CORRECTED: Section "InputDevice" Identifier "Generic Keyboard" Driver "kbd" Option "CoreKeyboard" Option "XkbRules" "xorg" Option "XkbModel" "pc105" Option "XkbLayout" "us,ru" Option "XkbVariant" ",winkeys" Option "XkbOptions" "grp:ctrl_shift_toggle,grp_led:scroll" EndSection
The issue has been resolved in my case after manual correction of /etc/X11/xorg.conf as shown below:
ORIGINAL:
Section "InputDevice"
Identifier "Generic Keyboard"
Driver "kbd"
Option "CoreKeyboard"
Option "XkbRules" "xorg"
Option "XkbModel" "pc105"
Option "XkbLayout" "us"
EndSection
CORRECTED: shift_toggle, grp_led: scroll"
Section "InputDevice"
Identifier "Generic Keyboard"
Driver "kbd"
Option "CoreKeyboard"
Option "XkbRules" "xorg"
Option "XkbModel" "pc105"
Option "XkbLayout" "us,ru"
Option "XkbVariant" ",winkeys"
Option "XkbOptions" "grp:ctrl_
EndSection