https://bugs.winehq.org/show_bug.cgi?id=48965
--- Comment #21 from Marko Friedemann mfr@bmx-chemnitz.de --- Created attachment 69286 --> https://bugs.winehq.org/attachment.cgi?id=69286 xev log of the same input sequence
OK, I see where you are coming from.
I tested the same input sequence with xev, attached the output. Sure enough, ALT_L involves FocusIn/FocusOut, wonder if that might have to do with the ALT key being mapped to something in unity/compiz.
Will take a look at options etc.
Thanks, HTH, M.