OS reports 'pthread_setschedparam failed; consider using ITIMER_HEARTBEAT: Operation not permitted'

[timrowledge]

The NuScratch beta VM has been changed from the alpha VM to use a thread based ticker instead of the timer interrupt ticker. The interrupts interact with some kernel problem and with the ASLA (mis)use of interrupts to cause total lock-ups when trying to play a sound.

One use reported a problem when testing -
'pthread_setschedparam failed; consider using ITIMER_HEARTBEAT: Operation not permitted'

[timrowledge]

Other testers report no problems with the thread usage.
One other user had the problem initially but not when logged in as 'root'.

The likely diagnosis is an out of date kernel.

[timrowledge]

Solved by up to date kernel.