Update to android 4.4.2 to solve the sleep of death problems
8 April 2015
Summary: Update: HP finally released a 4.4.2 update to the Slate Pro 21 which resolves the sleep problem they've been saying was a hardware issue for over a year now. I've heard it introduces some new issues but most of those are with the bundled HP apps that come with the device.
Summary: Very nice device. The rotation lock, however, which makes switching orientation impossible, does limit the device's ability to render some things. The exposed framework allows for dual portrait app side-by-side display, but this is an extensive work-around involving rooting, install exposed, etc.