On Wed, 1 Sep 2010, Artem Makhutov wrote: > > Are you sure about that? In the log you posted there were several > > errors; it looked like everything kept on working okay after the first > > couple of them. > > Yes, in this logs the errors were not that hard. > The option_instat_callback: error -71 did not appeared. I loose the > connection only after option_instat_callback: error. I don't recall seeing any of those errors in the logs you posted, just the -32 errors. To tell the truth, I can't imagine why the modem would send a STALL on its interrupt endpoint (which is what -32 means). Maybe it's some weird reaction to other communication errors. > I have assembled a new pc - also an Intel Atom based one - but with a > different mainboard. I have installed FreeBSD on it and here I could > reproduce the problem also on FreeBSD. > > I got a lot of error messages in dmesg and FreeBSD was disconnecting the > whole USB-Hub. > > Now I got a D-Link DUB-H7 USB-Hub. After connecting the modems directly > to it all the problems have gone. > > And now I am really confused. > > What influence can this hub have on the modems? Why did the problem > happened on all other USB-Hubs. I have tried ~6 different USB-Hubs. It > works only with the D-Link hub... It beats me. Maybe the D-Link hub has better shielding or better terminations, or is somehow more resistant to noise. 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
