[linux-dvb] dtt200u crashing with smp

ben handley ben at steelgarden.com
Mon May 28 12:27:17 CEST 2007

It doesn't generally produce a kernel crash -- generally the device
just stops working properly, and I get almost random noise on the
screen, with the occasional glimpse of a picture -- just as if I had
really bad reception. Rebooting fixes it, but unloading and reloading
the module does not. I haven't seen a kernel crash since changing
drivers, but it was fairly occasional anyway. I'll keep trying to see
if it eventually crashes. Other than that waiting for another crash,
is there any other way I can try to find the problem? Presumably
there's no way to use electric fence or valgrind on a kernel module --
is there anything else?


On 26/05/07, Markus Rechberger <mrechberger at gmail.com> wrote:
> Hi,
> can you submit a the crash dump with the latest code from linuxtv?
> (If you cannot scroll back you might try to patch your kernel with
> kdb, it will throw the system into a console management mode which
> allows to scroll back, this also won't require a serial cable/second
> PC for debugging)
> Markus
> On 5/26/07, ben handley <ben at steelgarden.com> wrote:
> > I just tried using fresh drivers built from linuxtv.org source, same
> > issue: reception breaks up after about 15 minutes of use, and only
> > rebooting fixes it. I unloaded the dvb_pll, dvb_core, dvb_usb, and
> > dvb_usb_dtt200u modules with the ones built in the v4l directory. Is
> > that everything that I need to replace?
> >
> > The device was never actually disconnected -- it's been physically
> > plugged in all the time. Could the problem be a loose connection that
> > makes the computer think it's been disconnected? I tried removing all
> > the extra cabling and plugging the usb stick directly into the port,
> > but that made no difference either. So far the only thing that's made
> > a difference is SMP.
> >
> > Thanks,
> > Ben
> >
> > On 23/05/07, Markus Rechberger <mrechberger at gmail.com> wrote:
> > > yes they're significantly out of date, I'm not sure what the status of
> > > your device is better try to upgrade to the latest available
> > > sourcecode.
> > >
> >
> --
> Markus Rechberger

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