I know this is an ollld thread, but I'm wondering if anyone has had any luck with the same kind of thing, but for the music folder & builtin music app? (Neither the usual dbus-send nor the usbUnconfigured/usbPlugOut make a difference.)
EDIT: I worked around this issue by ditching the stock player for
fbdev's awesome kinamp (frontend/gui for mplayer). I would have used straight
mplayer from this thread sooner, but it has steady 50% cpu usage on my Kindle, whereas the mplayer fbdev compiled tends to use ~9%, similiar to the built-in player.