Am Dienstag, 9. Mai 2006 17:57 schrieb Alexander V. Lukyanov:
> On Sat, May 06, 2006 at 10:23:05AM +0200, Oliver Neukum wrote:
> > Am Samstag, 6. Mai 2006 07:20 schrieben Sie:
> > > On Sat, May 06, 2006 at 12:05:42AM +0200, Oliver Neukum wrote:
> > > > It might be that your modem cannot cope with the ring buffer patch
> > > > that went into 2.6.16. Can you revert a specific patch?
> >
> > The patch indicated below. Are you running on x86?
>
> Yes, x86. It is an athlon xp system with nforce2 chipset.
>
> I could not find complete patch from the mailing list message you
> pointed me to, the sf list archive contains truncated (short) message
> with the patch, and e-mail addresses from the patch are mangled.
>
> But I have taken cdc_acm driver from 2.6.15, patched forward tty_flip
> and usb_driver.owner incompatibilities with 2.6.16, and voila - cdc_acm
> driver from 2.6.15 works fine on 2.6.16 kernel, no dups at all.
Very good. It seems that something in your system cannot cope with higher
speeds of the 2.6.16 driver. Could you please take the 2.6.16 driver and
half the values of ACM_NRU and ACM_NRB in cdc-acm.h until you find a
value that works?
The traces you provided show that the duplication is already present at
the hcd layer. Thus it must either be the hcd driver (very unlikely),
your motherboard or the device. In the latter case I'll have to introduce
a special case for your modem.
Regards
Oliver
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