@Andy Whitcroft: your test kernel Linux version 3.11.0-16-generic (apw@gomeisa) (gcc version 4.8.1 (Ubuntu/Linaro 4.8.1-10ubuntu9) ) #27lp967399v201401171555 SMP Fri Jan 17 16:08:18 UTC 2014 works completely fine at my Lenovo L530
@Andy Whitcroft: 401171555 SMP Fri Jan 17 16:08:18 UTC 2014
your test kernel
Linux version 3.11.0-16-generic (apw@gomeisa) (gcc version 4.8.1 (Ubuntu/Linaro 4.8.1-10ubuntu9) ) #27lp967399v201
works completely fine at my Lenovo L530