Fixing suspend/resume on Lenovo x220

[matt]

On 06/13/13 07:16, John Baldwin wrote:

> 
> Interesting, I connected a serial console via AMT but wasn't able
> to get any output during resume.  Is this with a stock kernel?
> 

I think if X is loaded or certain USB peripherals are attached it
quietly panics at resume. You'll note that we are sending D3 to the
USB bridges, which complain loudly before suspend is complete...I
think in the hackintosh world, they are using a custom DSDT that
prevents that or something to allow OS X to resume.

Matt