XO-1 vs Sugar 0.104 performance, and swap to NAND Flash

James Cameron quozl at laptop.org
Mon Apr 13 02:44:55 EDT 2015

On Mon, Apr 13, 2015 at 05:56:22AM +0000, Yioryos Asprobounitis wrote:
> James wrote:
> > To check, make sure the laptop is unlocked, and add this to the
> > second line of the boot/olpc.fth file:
> > 
> >     dev /sd  patch 2drop cb! sdhci-card-power-off  dend
> Does this keep the SD slot powered only when is occupied or
> regardless?

Regardless, but only if the slot is powered up for access.

> Does the OS takes over the SD slot power management after boot?

Yes.  The firmware driver is not used by the kernel.

> If not, can OFW detect the presence of an external SDcard early, and
> keep it powered only then or detect its absence latter in the boot
> sequence and revert?

Not answered.

James Cameron

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