Tkinter's overrideredirect prevents certain events in Mac and Linux
I have submitted a bug report to Tk for this situation.
You can use the devilspie program to remove the decorations from your window. Use the wm title . myname command to give your window a specific name and use that name in the devilspie configuration fragment below. Remove the overrideredirect command from your program.
I have tested this (as a Tk program), and the undecorated window will still receive the keypress &etc. bindings.
Note that devilspie is written as a daemon process and stays active. The daemon can be killed after it is started and the window changes it made will still be in effect. Or it can be left running, and any time your window is activated, the devilspie configuration will be applied.
(if (is (application_name) "t.tcl") (begin (undecorate)))