Alan Stern wrote: > 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. Hmm, and it's corresponding PCI device? I know, not always the case but ... -- 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
