Date: Fri, 9 Jan 2009 12:02:39 +0100 From: Hans Petter Selasky <hselasky@c2i.net> To: freebsd-current@freebsd.org Cc: Poul-Henning Kamp <phk@phk.freebsd.dk>, current@freebsd.org Subject: Re: 3G modem and USB, old & new Message-ID: <200901091202.41011.hselasky@c2i.net> In-Reply-To: <3994.1231494833@critter.freebsd.dk> References: <3994.1231494833@critter.freebsd.dk>
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On Friday 09 January 2009, Poul-Henning Kamp wrote: > I tried using my 3g modem (Huawei E196) yesterday, with both the > old and the new USB stack, and it fails in slightly different > ways. > > With the old USB stack, it works until I actually try to get a packet > of more than approx 1024 bytes through, at which point it hangs with > ucom0: ucomreadcb: IOERROR > And I need to stop and start ppp(1) to get it working until the next > big packet comes around. > > It does not help to reduce the MRU because two small packets back to > back will also trigger this error. > > With the new USB stack, I am not able to talk to the modem at all > using the cuaU* devices. Hi, With regard to the new USB stack: Do you see any USB error messages in dmesg? What does the dmesg print out? Also there are debugging sysctls: sysctl -a hw.usb2 | grep debug Also try dumping the descriptors of your device using "usbconfig -u xxx -a yyy dump_device_desc dump_curr_config_desc". You can also try things like: usbconfig -u xxx -a yyy reset --HPS
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