- start as busy, since we don't know
- send a kernel_info request once connections are established
- set idle on reply to the to the kernel_info request
add casper.wait_for_busy
like wait_for_idle, but busy
restore kernel notification widget
it's still used for interrupt / restart
use wait_for_busy in check_interrupt test
MinRK
Brian E. Granger
Matthias BUSSONNIER
Kieran O'Mahony