Silicon Motion chip on amd64

[Free Ekanayaka]

Hi Alex,

|--==> Alex Deucher writes:

  AD> you may get a some problems if you try and switch modes when the
  AD> accelerator is active.  I'll try and check in a better fix when I get
  AD> back home next week.  Thanks for testing.

just to know, did you already have chance to work on this? it would be
great to have this fixed applied in the main distribution.

Ciao,

Free