On Thu, 26 Aug 2010, Artem Makhutov wrote: > Hello, > > Artem Makhutov schrieb: > > [...] > > When connecting multiple modems to a pc and start communicatin with them > > the connection gets broken and the log file gets full of the following > > messages: > > > > [...] > > option: option_instat_callback: error -71 > > option: option_instat_callback: error -71 > > option: option_instat_callback: error -71 > > [...] > > > > I forgot to mention that the errors: > > Aug 26 11:49:30 localhost kernel: option: option_instat_callback: error -32 > Aug 26 11:49:31 localhost kernel: option: option_instat_callback: error -32 > Aug 26 11:49:38 localhost kernel: option: option_instat_callback: error -32 > Aug 26 11:49:39 localhost kernel: option: option_instat_callback: error -32 > > Are also pretty common. > > The error is pretty easy to reproduce: > > I just need to connect the modems to a pc and open the ttyUSBX port > using minicom. > > A few minutes later I can not send any AT commands to the modem any > more, neigther I can receive the preriodical updates from the modem. Maybe the problem is in the hubs. What happens if you attach one or two modems directly to the computer without using any hubs? 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
