u3g driver sometimes loses the Huawei E169 modem after upgrade to 8.0BETA2

[Hans Petter Selasky]

On Thursday 13 August 2009 23:32:52 Edwin Groothuis wrote:
> Hello,
>
> On 7.x this never happened, but on 8.x now and then (once or twice
> every traintrip) the E169 modem gets lost: You see the kernel
> messages that the device disappeared, /dev/cua0.0 disappears and
> thus PPP stops etc.
>
> Please let me know what kind of tests you want me to do to determine
> to root-cause and a possible fix.

How much traffic is being passed when the modem stops?

If the device just disappears it is a sign of a crash on the modem side, and 
there is not so much we can do about it. You could try:

sysctl hw.usb.ehci.no_hs=1

Before plugging the device. This will limit the speed to FULL speed only.

--HPS