[ltp] W520: strange suspend-to-ram issue solved!

Tom Roche linux-thinkpad@linux-thinkpad.org
Fri, 22 Jun 2012 10:35:02 -0400

Fionn Behrens Fri, 22 Jun 2012 10:44:32 +0200
> I have a Sandy Bridge W520 with Optimus. It showed the following
> behaviour: You could suspend (S3) it once without a problem, but
> after the second try, it would use a lot more power than before AND
> it wont run any faster than the lowest possible CPU clocking speed.
> This behaviour only went away when I shut down the computer, cut off
> power and restarted it.

> Yesterday I found the solution to this: Install IronHide

How did you install IronHide? via


or compiling from



> use it to switch the nVidia Core just on and off once after resume.

TIA, Tom Roche <Tom_Roche@pobox.com>