keyboard/mouse freeze after 2-3 seconds on Debian

[Davo-CC]

Thanks, I actually ditched the build and started again with a new build cycle - I was having too many problems with that build (but am still not sure of root cause). So far it's been better behaved but I'm seeing much slower performance on initial tests than I expected; load times are good but some comparisons with a CPU miner (compared to a Pi v2 running Raspbian 32-bit) are showing similar speeds when this should be much faster.
Nothing conclusive yet, still very early days in testing.