On Saturday 05 January 2013 12:49:50 Mariusz Kozlowski wrote:
> On Sat, Jan 05, 2013 at 01:55:23AM +0100, Markus Grabner wrote:
> > On Saturday 05 January 2013 00:13:22 Mariusz Kozlowski wrote:
> > > On Fri, Jan 04, 2013 at 07:53:20PM +0100, Markus Grabner wrote:
> > > > The system log should now contain all relevant messages sent to and
> > > > received from the device. You said that you observed periodic
> > > > requests,
> > > > so could you please extract all lines from the syslog from loading the
> > > > new driver until the periodic message has appeared several times, and
> > > > send this to me?
> > >
> > > Ok. I modified the code with little printks here and there so please
> > > find both patch (based on svn rev 976) and log attached. Log begins when
> > > I
> > > insmod line6usb and ends when I rmmod line6usb. My changes are probably
> > > not
> > > needed at all as 'dump control messages' shows a lot.
> >
> > Thanks for the data! I was hoping to see a different response to the
> > version request code (F0 7E 7F 06 01 F7), which could simply be detected,
> > but there doesn't seem to be any response at all. You mentioned that you
> > successfully used the driver 2 years ago, so it would be useful to have
> > the logs (with "dump control messages" enabled) of this old version. It
> > might be difficult, though, to compile it, since the Linux kernel has
> > changed a lot since then, and the Line6 driver changed accordingly. If
> > you succeed, please provide the logs and let me know whether the driver
> > special file "firmware_version" contains the correct value.
>
> Ok so I checked my emails and last time I'm sure it worked was something
> around the time when line6usb driver was submitted to staging area (if you
> remember I suggested that to you and Greg AFAIR ;)).
To be honest, I didn't remember your name since then, but you are right, your
proposal dates back to February 11th, 2009 :-)
> The oldest version I could (easily) compile is svn rev 549 from July 2009
> which matches with my emails. Around that time snd_card_create() was
> introduced and current kernels don't even have snd_card_new(). I had to
> add a few missing includes, convert err() to printk(KERN_ERR) and enable
> DEBUG_MESSAGES.
>
> I'm surprised but actually firmware version is detected correctly. The
> dump looks a bit different. Maybe you can make something out of it.
> From what I can tell firmware version is send in third 'packet'.
I don't have the time right now to look at this in detail, but it looks very
promising if you have an earlier version which does a correct firmware version
request.
> > Another debugging option is to record the USB traffic under Windows with
> > the original Line6 driver by some USB logging software. Somewhere during
> > initialization, the firmware version number should be transmitted, though
> > this is somewhat of a needle-in-a-haystack problem.
>
> Hm.. that can be tricky as I have old disks with windows somewhere which
> were not used for a few years. It's doable I think but first let me know
> if current linux dump is enough or not.
I guess the new dumps (or maybe some additional ones with the same driver
version) will be enough. I will investigate this in the evening.
> > Do you have a Variax guitar connected to the PODxt Live via the Variax
> > digital cable? Don't know if it is relevant, just to make sure we have
> > the same setup.
> No. It is an electric guitar connected via INPUT jack.
Ok.
> Please find dump and diff based on 549 attached. The kernel I compile
> against is 3.5.0-21-generic from ubuntu.
Thanks! Yesterday I tried r598, which crashed the machine after a few seconds
:-(, then I gave up. r549 with your patch compiles with kernel 3.4.11, I will
test it later with my PODxt Live.
Kind regards,
Markus
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