Out of curiosity, could you please try the following,
1. Change the shortcut that lets you switch between keyboard layouts to LShift+RShift (that it, it does not involve the Alt key)
2. Try again Alt+Tab, etc and report if it now 'works'.
Again, this is an issue that is related to the inner workings of the X.org server.
Out of curiosity, could you please try the following,
1. Change the shortcut that lets you switch between keyboard layouts to LShift+RShift (that it, it does not involve the Alt key)
2. Try again Alt+Tab, etc and report if it now 'works'.
Again, this is an issue that is related to the inner workings of the X.org server.