You can't really say this is the behaviour of menus "in Linux" because there are many desktop environments you can use in Linux, which may have many different behaviours regarding menus. Vanilla Ubuntu uses GNOME, where a context menu appears when you press the mouse button. If you then release it, it remains, and you can make a selection by another click. If you hold it down, you can move the cursor over an item and then release to make a selection. A quick test shows that there's a delay for activation of this "release to select" behaviour, so this perceived "randomness" only happens if the click is _very_ slow and ends up being interpreted as a hold instead of a click.
-- [MASTER] right click (with button release) might activate random popup-menu-item https://bugs.launchpad.net/bugs/187313 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs