I'm trying to make keyboard shortcuts using Super+alt+something, the problem is that Super+alt sometimes behaves as just Super making shorcuts as Super+alt+L same as Super+L. but even worst, when I map it to a new shortcut (using input remapper) the result of the remap inherits behaviors of other shortcuts having same letters.
For instance in my computer: Ctrl+Alt+Arrow and Super+Alt+Arrow and also Super+Re pag move the virtual desktop, from these three only the last is registered in settings, keyboard shorcuts (so no idea why they have that behavior in the two first cases)
If map Super+Alt+A to Left Arrow what I get when pressing Super+Alt+A is the virtual desktop moving to the left, instead a plain left arrow.
I have investigated a lot, tried additional layout options 'alt and win behavior' inside gnome tweaks, looked multiple post here:
Problem with shorcuts using Alt key
OS keyboard shortcuts conflict with apps keyboard shortcuts in GNOME 3
It seems there is even a related bug in ubuntu:
https://bugs.launchpad.net/ubuntu/+source/gnome-settings-daemon/+bug/1245473
Just wanted to know if there is any known work around? or if somebody can put a bit of light in this topic. Thanks!
pd: I use a custom keyboard layout that is changed using Super+Space (not same as in the bug)