AHCI aggressive powersaving

2007-06-11 Thread John Fremlin
Kristen Carlson Accardi <[EMAIL PROTECTED]> writes: [...] > I've updated the hardware based patches and posted to the mailing list - > they do indeed save anywhere from .6-1.5 watts depending on the system, > on my X60 they save about a watt. I don't think that a hardware based > solution is irre

Re: [PATCH] AHCI powersaving and port-stopping (2.6.22-rc4)

2007-06-11 Thread John Fremlin
> [] kthread+0x0/0x80 > [] child_rip+0x0/0x12 > > Looks like the kernel complains about a bug or something at this > point?! Because I am not a developer I can't tell for sure, but I > don't think this is all good. > It is printed to dmesg when booting and a second ti

Re: [PATCH] AHCI powersaving and port-stopping (2.6.22-rc4)

2007-06-11 Thread John Fremlin
Peter Ganzhorn <[EMAIL PROTECTED]> writes: > I just wanted to have a look at the patch and see if it works for me - > looks like somethings not all straight, I get this while booting: > > ahci :00:1f.2: version 2.2 > ACPI: PCI Interrupt :00:1f.2[C] -> GSI 19 (level, low) -> IRQ 19 > ahci

[PATCH] AHCI powersaving and port-stopping (2.6.22-rc4)

2007-06-11 Thread John Fremlin
Tejun Heo has made an excellent patch for saving power with the AHCI chipset. It saves about 1 W on my Thinkpad X60s. This patch will stop the ports when they are idle. To turn it on, echo 1 > /sys/module/libata/parameters/powersave This is very different from the patch I posted a while ag