According to the https://elinux.org/BeagleBoardDebian#SGX_BeagleBone.2FBeagleBone_Black i installed v 4.4 kernel and boot up with 4.4 kernel and do the all steps again.after some efforts i can load "pvrsrvkm" but omapflb not loading.when i run "sudo modprobe omaplfb" i got the error "modprobe: ERROR: could not insert 'omaplfb': Exec format error"