On Mon, 2008-08-25 at 20:14 -0700, Jeffrey W. Baker wrote: > On Mon, 2008-08-25 at 17:14 -0700, Grant Grundler wrote: > > On Sun, Aug 24, 2008 at 10:27 AM, Jeffrey W. Baker <jwbaker@xxxxxxxxx> wrote: > > > I started using the min_power ALPM setting on my ThinkPad to save power > > > (which works great, thanks!) but it causes a small problem. When the > > > machine resumes from suspend-to-ram it hangs for about 10s and then > > > prints this on the console: > > > > > > ata1: COMRESET failed (errno=-16) > > > > > > It then proceeds normally. The full messages are: > > > > > > ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300) > > > ata1.00: configured for UDMA/100 > > > ata1: failed to recover some devices, retrying in 5 secs > > > ata1: soft resetting link > > > ata1: SATA link down (SStatus 611 SControl 300) > > > ata1: failed to recover some devices, retrying in 5 secs > > > ata1: hard resetting link > > > ata1: port is slow to respond, please be patient (Status 0x80) > > > ata1: COMRESET failed (errno=-16) > > > ata1: hard resetting link > > > ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300) > > > > Can you enable CONFIG_PRINTK_TIME in your kernel? > > Output follows ... > > > It sounds like the ahci driver is having problems spinning up > > the disk after putting it into a "low power state" (which I > > have no clue might be). Getting more accurate time > > stamps might be a useful additional clue. > > The disk is an SSD so there's no need for delay to allow it to spin > up. I just did an experiment, and a workaround for this problem is to enable max_performance immediately before sleep and return to min_power during resume. -jwb -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
