Very slow-starting EVDO modem (WORK-AROUND FOUND)
Mikkel L. Ellertson
mikkel at infinity-ltd.com
Sat Dec 20 17:33:19 UTC 2008
Frank Cox wrote:
> On Wed, 3 Dec 2008 01:34:56 -0600
> Frank Cox wrote:
>>> As you can see, it took six minutes before the device somehow reset itself and
>>> the machine realized that it had a modem attached.
>> I have now discovered what changes when the five minute delay is up. As
>> mentioned before, the modem takes 5 minutes before it creates the /tty/USB?
>> Somehow, the modem changes its identity after being plugged in for 5 minutes.
> Jamie Bernstein is also using a Novatel EVDO modem and he sent me a work-around
> for this bug yesterday:
> This command will cause the modem to immediately do its thing (reset?) and
> create the /dev/ttyUSB? devices.
> eject /dev/cdrom
> After entering this command at a terminal prompt (or putting it
> into /etc/rc.local if the modem is connected on boot-up) the modem immediately
> starts working. No 5 minute wait required.
> Therefore, if there is some way that the kernel driver for this modem can issue
> a similar "reset" command, the problem may go away.
> I have added a note about this to the bug report at:
I am glad to hear you have it working.
Maybe a HAL rule to eject the SCSI device the Novatel as soon as it
is detected? Or a udev rule that does the same thing? Just as a
temporary fix? If I remember right, it has different device IDs in
drive and modem modes.
Do not meddle in the affairs of dragons,
for thou art crunchy and taste good with Ketchup!
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