lsusb for the Senao EUB9801 says its max power is 450mA, so only 50mA less than the Atheros. However, I suspect those are just numbers someone's typed in a text file somewhere. They might not actually be drawing those currents.
It looks like a USB tester can be purchased online for $10. For that money, I might just buy one and actually measure the current draw. Btw, from what I saw on Wikipedia, it looks like a standard usb 2.0 port should be able to supply 500mA as standard. Lee On Sun, 2019-03-31 at 14:04 -0400, Lee Strobel wrote: > Hi Denis, > > > For the record, the WiFi related bugreport is here: > > https://labs.parabola.nu/issues/2261 > > > > Could you try to see if a USB HUB that is powered by its own power > > supply makes it usable. If you don't have one you may know people > > that > > have one and borrow it just for doing a quick test. > > > > I will see what I can do. I can't think of anyone I know off-hand who > would have an externally-powered USB hub, but I will ask around. > > About the power thing: I actually have an older USB wifi dongle, a > 'Senao EUB9801', which seems to work great when plugged directly into > the Chromebook (if I use the firmware blob). According to the kernel > boot log, I think it is running on a Ralink chip of some kind. I will > try to investigate, as you suggested, and see if it requires less > power > than the ThinkPenguin dongle. It is older (~8-10 years), so maybe it > is > using an older wifi technology that consumes less power? > > The reason I asked about the kernel devs is just because I was > wondering if the team that maintains the module for the Atheros chip > are aware of the issue. I would think we might need their assistance, > if any of us wanted to try to modify the module. > > Lee > > _______________________________________________ > Dev mailing list > [email protected] > https://lists.parabola.nu/mailman/listinfo/dev _______________________________________________ Dev mailing list [email protected] https://lists.parabola.nu/mailman/listinfo/dev
