jackd mlock error

["Thomas H. George" <xyz@spininternet.com>]

Yesterday I could run jackd --realtime -d alsa -r 44100 as a regurlar 
user.  This morning I ran a dist-upgrade that included an upgrade of 
realtime-lsm.  Now the jackd command aborts with a message:

unable to mlock() port buffers:  Operation not permitted.

I can still run jackd as root but then I can't run Ardour as root.

How do I fix this?

Tom George