Slowing down an XO-1.5

2010-03-30 Thread John Watlington
Mitch, Is there a simple way from OFW (or ACPI) to restrict the operating frequency of the processor in the XO-1.5 to be the lowest possible ? The relevant comment from a deployment was that they can't use full speed XO-1.5 motherboards as replacements for XO-1 motherboards. They think kids

Re: Slowing down an XO-1.5

2010-03-30 Thread James Cameron
They'd also notice the graphics performance differences, and that wouldn't be amenable to a simple fix. -- James Cameron http://quozl.linux.org.au/ ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel

Re: Slowing down an XO-1.5

2010-03-30 Thread John Watlington
On Mar 30, 2010, at 2:48 AM, James Cameron wrote: They'd also notice the graphics performance differences, and that wouldn't be amenable to a simple fix. Correct, and they would still get twice the memory and roughly 1.5 times the storage (JFFS2 is compressed). What I didn't mention is that

Re: Slowing down an XO-1.5

2010-03-30 Thread Mitch Bradley
ok 406. 199 msr! The period after 406 is mandatory - it forces the number to be 64-bits, suitable as the data operand to msr!. John Watlington wrote: Mitch, Is there a simple way from OFW (or ACPI) to restrict the operating frequency of the processor in the XO-1.5 to be the lowest

Re: Slowing down an XO-1.5

2010-03-30 Thread Mitch Bradley
The 4 is 406 is for 400 Mhz. The normal value is a06, where a is decimal 10 for 1000 Mhz. The 6 is the voltage selection code; this processor only supports the value 6. Mitch Bradley wrote: ok 406. 199 msr! The period after 406 is mandatory - it forces the number to be 64-bits, suitable

Re: Slowing down an XO-1.5

2010-03-30 Thread Mikus Grinbergs
Is there a simple way from OFW (or ACPI) to restrict the operating frequency of the processor in the XO-1.5 to be the lowest possible ? The relevant comment from a deployment was that they can't use full speed XO-1.5 motherboards as replacements for XO-1 motherboards. They think kids

Re: Slowing down an XO-1.5

2010-03-30 Thread John Watlington
On Mar 30, 2010, at 9:56 AM, Mikus Grinbergs wrote: Is there a simple way from OFW (or ACPI) to restrict the operating frequency of the processor in the XO-1.5 to be the lowest possible ? The relevant comment from a deployment was that they can't use full speed XO-1.5 motherboards as