Re: [hylafax-users] R: Hylafax Freeze with no error or warning

[John Hudak <jjhudak@xxxxxxxxx>]

Modem power *could be* a problem.  USB 2.0 specifies a maximum power current to 500 ma can be provided (I think the minimum specified is 200 ma, but I have to double check that and the spec is not at my fingertips at the moment).  Over the past few years, board manufactures have tended to 'skimp' on current capabilities on the USB ports.  This is a general statement, many mfg do not put the current specs for the USB ports in their board manuals.
To eliminate USB power as an potential problem, one can use an externally powered USB port expander or, use a USB cable that has a second parallel USB plug to provide additional power.

Good luck,

John

On Thu, Dec 16, 2010 at 5:56 AM, Giuseppe Dia <giuseppe.dia@xxxxxxxxxx> wrote:

Hi Lee,
thanks for the prompt answer.
The modems are usb and usb powered, I expect no power cycling should occur
without affecting the server itself (the server itself has an UPS).
Moreover I enabled the feature as well as the debugging, so next time I will
have more information.
I don't know if the faxgettys were running as I had to restart hylafax right
away, but I will look into it next time it happens (I hope I doesn't,
anyway).
Hope it's not a 'feature' of these cheap usb stuff.
Thanks,

G.

-----Messaggio originale-----
Da: hylafax-users-bounce@xxxxxxxxxxx
[mailto:hylafax-users-bounce@xxxxxxxxxxx] Per conto di Lee Howard
Inviato: giovedì 16 dicembre 2010 7.07
A: Giuseppe Dia
Cc: hylafax-users@xxxxxxxxxxx
Oggetto: Re: [hylafax-users] Hylafax Freeze with no error or warning

Giuseppe Dia wrote:
> Today the hylafax server I put up with those USB modems failed.
> The line just rang free, but no fax was received and you could not see any
> activity in syslog.
> Restarting Hylafax solved the problem immediately.
>

Were the faxgettys running?

> Hylafax is 6.0.4-10ubuntu1 on an ubuntu i686 10.10 Linux
> 2.6.35-22-generic-pae #35-Ubuntu SMP
> I looked at the logs but there's really nothing abnormal in them.
> I enabled verbosity for all three modems, waiting for the next occurrence.
> Is this any known issue? This a sample config.tty from one of them. The
> modems are AtlantisLand (Conexant chip) USB modems using the ACM driver.
> Any idea? No warning mails about modems wegded, I use to receive them if I
> unplug one of the modems without stopping hylafax, so the warning system
> should be ok.

The only thing I can think of is that something happened to the modems
such as a power-cycle/reset that occurred unknown to HylaFAX/faxgetty.
Thus the modems ended up in an uninitialized state, and thus they
weren't operating as expected.

HylaFAX+ (http://hylafax.sourceforge.net) has a feature called
"PollLockPokeModem" which can be set to "true" which will cause faxgetty
to routinely check the modem to ensure that it's present and
responsive.  Hopefully if the modems are reset this will faxgetty to
detect the problem and reset the modem automatically.

Thanks,

Lee.


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