Messages in this thread | | | Subject | Re: USB serial regression 2.6.31.1 -> 2.6.31.2 | From | Benjamin Herrenschmidt <> | Date | Sun, 11 Oct 2009 08:20:17 +1100 |
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On Sat, 2009-10-10 at 16:41 -0400, Alan Stern wrote: > On Sat, 10 Oct 2009, Alan Stern wrote: > > > On Sat, 10 Oct 2009, Josua Dietze wrote: > ... > > > This is one of the mode switching devices. It is switched to modem > > > mode by "usb_stor_huawei_e220_init". > > > > > > Something keeps resetting it to initial mode. It might be a > > > powersave/suspend issue. > > > > It's not related to powersave or suspend. (Although both trace files > > show that the device's remote-wakeup feature did get enabled; I have no > > idea what code was responsible for doing that. AFAIK it shouldn't > > happen unless the device is about to be suspended.) > > It turns out that the remote-wakeup enable _is_ the mode-switch > command. Don't ask me why the manufacturer decided to use an > pre-existing command to tell the device to switch modes. > > Anyway, it's clear from the logs that the mode switch worked in both > cases. Initially the device shows only one interface, and after the > mode switch it shows four.
Yes, that works, you can see the ttyUSBx ports showing up. It looks like it may just be the resets coming from usb-storage that are breaking things.
Cheers, Ben.
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