On Wed, Feb 13, 2008 at 03:54:38PM +0000, Sergio Callegari wrote:
> Hi,
>
> I have an ONDA N501HS (namely a rebranded ZTE MF330) UMTS pc card.
>
> I am currently using this card with the sierra driver (as in current kernels).
Which kernel version specifically?
> However I am noticing the following problem:
>
> - when I use the card for downloading from the internet, everything is fine;
> - when I use the card for uploading to the internet, after a few tens kB, the
> card freezes.
>
> Freezing goes as follows:
>
> the card provides 3 ports: ttyUSB0 to ttyUSB2. The port ttyUSB0 that is used
> for
> data stops working completely. It becomes impossible to talk to it, until the
> pc-card is extracted and put again in the pcmcia slot. The other ports keep
> working.
>
> I wonder if this might have something to do with flow control (or lack
> thereof)
> that causes the card to be flooded with data from the computer until it locks.
Probably.
> I believe that flow control might be the issue, since if I use upload programs
> that let me decide the data rate and I pick a low enough rate everything goes
> just fine.
>
> I have also seen that the ZTE MF330 has just been moved from the sierra driver
> to the option driver.
> Is there any chance that this might fix my problem?
Well, it might, as it turns out that this really is not a sierra
wireless based device, it's something else.
So try changing drivers and see if that gets better.
> If this is the case, having my distribution kernel source, once I have applied
> the patch, how can I rebuild _only_ the sierra and the option modules?
make M=drivers/usb/serial/
will build only that one directory.
Or:
make drivers/usb/serial/option.ko
should build only that module.
You might have to do a 'make oldconfig' and 'make prepare' first though.
Hope this helps,
greg k-h
-
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
