On Tue, 26 Mar 2013, David Linares wrote: > >> While enabling usbmon, I noticed something that can be related. > >> There is a config: "Maximum VBUS Power usage" which is currently set to > >> 300mA in my case. > > > > That option (USB_GADGET_VBUS_DRAW) applies only to gadgets. That is, > > it's meant for the part of the USB stack used in peripherals, not in > > hosts. > > > > Ok, so I guess these are the 300mA which are currently reported by the HID > keyboard emulation for example, as I do have this gadget. That's right. > >> But here is the USB dongle I am using: > >> > >> lsusb -v > >> ... > >> idVendor 0x148f Ralink Technology, Corp. > >> idProduct 0x5370 RT5370 Wireless Adapter > >> .. > >> MaxPower 450mA > >> > >> I guess setting 450mA will sort out my issue number 4 and avoid the > >> "usb 1-1.1: rejected 1 configuration due to insufficient available bus power" > >> right? > > > > No, it won't have any effect at all. What might help would be to plug > > the wireless adapter into a powered hub instead of directly into your > > computer. > > > > The device I am working on is an embedded device, therefore the wireless > adapter has to be connected to the internal hub. This hub and the whole device > are powered via an usb cable. Oh. Then maybe the USB cable doesn't provide enough power to run both the embedded device and the wireless adapter. > I have posted a full "lsub -v" that I ran on the device when everything works, > just in case someone spots something very obvious: > http://pastebin.com/HypTRS9J The lsusb output says that the Ralink wireless adapter will use up to 450 mA, leaving only 50 mA available for the rest of your device. Do you think that is enough? 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
