From what I found from xkeyboard-config man page there is no such combination, which is very upset. Is there any workaround for that?
Because I want layout change to be as in winXP.
Indeed it seems that the combination of Alt_L+Shift_R isn't provided by default.
But you can define it.
Look for example at this answer: How to put some keyboard layout aside from layout switching ring?
Just put in the mysymbols file a section like this:
and in the ~/.xkb/keymap/mykbd file, on the xkb_symbols line add "+mysymbols(l_alt_r_shift_toggle)"
Note, however, that this actually defines also Shift_l+Alt_l and Alt_R+Shift_R (actually, if shift (any shift) is pressed first, then the redefinition of Alt_R is triggered; and if alt (any alt) is pressed first, then the redefinition of Shift_R is triggered) To restrict the toggle to ONLY Alt_l+Shift_r it would require a lot more thinking and hacking, I don't think it would be worth the trouble.