On Thu, 29 Aug 2013, Martin MOKREJŠ wrote: > Hi Xenia, > thank you, how about inclusion of the "parent hub" number in the > following message (as of now): > > Parent hub missing LPM exit latency info. Power management will be impacted. > > > > I find it awkward to later on run manually lspci/lsusb to find what is the parent. You don't need to run those programs. > I think I do NOT get these messages when I have pcie_aspm=off whereas when > it is on I get the warning. Why PCIe powersaving affects how USB end devices will > be put to sleep I don't know. But that will be the next step to look into. > First the warning message. And maybe it could be improve even further to include > other relevant capabilities of the "parent" present/missing. ;-) > > > Here are bits from my dmesg: > [ 5.291321] usb 4-2: new SuperSpeed USB device number 2 using xhci_hcd > [ 5.313219] usb 4-2: Parent hub missing LPM exit latency info. Power management will be impacted. Since this device is 4-2, the parent hub is usb4. 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
