On Thu, 26 Jul 2012, Bjørn Mork wrote: > Huang Ying <ying.huang@xxxxxxxxx> writes: > > > Do you have time to try the below patch? > > Sure. Looks OK wrt the USB problems, but may cause problems with the > PCIe WiFi card. Unless those are related to other changes in -next. > > Anyway, for I applied your patch on top of next-20120724 for > consistency (still without Rafael print fix, so we get the D4 below). > This results in different stats for the uhci_hcd and ehci_hcd: > > > Jul 26 12:13:42 nemi kernel: [ 72.820305] uhci_hcd 0000:00:1a.2: power state changed by ACPI to D2 > Jul 26 12:13:42 nemi kernel: [ 72.835101] uhci_hcd 0000:00:1d.0: power state changed by ACPI to D2 > Jul 26 12:13:44 nemi kernel: [ 74.808770] uhci_hcd 0000:00:1a.0: power state changed by ACPI to D2 > Jul 26 12:13:44 nemi kernel: [ 74.840293] ehci_hcd 0000:00:1d.7: power state changed by ACPI to D4 > Jul 26 12:13:44 nemi kernel: [ 74.840326] ehci_hcd 0000:00:1a.7: power state changed by ACPI to D4 > > I assume that is expected, based on the lspci output I posted earlier. > Overall I get a nice mix of allowed/disallowed: ... > USB hotplugging seems to work fine with this. Don't be too sure. Have you tested to see if it still works after doing "rmmod ehci-hcd"? So far you have tested the EHCI controllers, but have you tested the UHCI controllers? Unloading ehci-hcd will force them to be used. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
