On Mon, Jul 26, 2010 at 02:06:51PM -0700, Luis R. Rodriguez wrote: > No, ASPM must be enabled by the Systems Integrator through the BIOS, there are > other settings that have to be taken care of like modifying some PCI entrance and > exit latency timers, the number of FTS packets we send to exit L0s, amongst > other things. If a user selectively enables L1 but the BIOS had it disabled on > the device it may not work correctly. That's really the job of the driver. If the ASPM policy is set to powersave, the fadt doesn't indicate that ASPM should be disabled and the bus's _OSC method grants full control then the kernel will enable whatever combination of L states meet the latency constraints. If the hardware has additional constraints then the hardware-specific driver needs to handle them. We don't rely on the BIOS to set up ASPM states. Nor does Windows. -- Matthew Garrett | mjg59@xxxxxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
