Re: Sony PlayTV Dual Tuner- dvb_usb_dib0700

[Andrew Goff <goffa72@gmail.com>]

Further to below I had been thinking that after a scan sometimes my
system would crash but it seems the usb devices became disabled and
therefore i could not use the mouse or keyboard.
When I do the test remotely I can do further tests, I had not
previously noted the correlation of this behaviour.

After a reboot it is the first scan that causes disabling of the hub,
EMI issue which I don't get on Ubuntu 16.04. Using either adapter0 or
1 creates this error.
Closing the terminal and doing a new scan on either adapter
successfully completes without any further errors.


On Sat, 14 Aug 2021 at 11:10, Andrew Goff <goffa72@gmail.com> wrote:
>
> Hi Sean,
>
> I'll have a go at using bisection.
>
> Attached is the output of dmesg, when I started a scan of adapter1 the
> following occurred -
>
> usb usb1-port1: disabled by hub (EMI?), re-enabling...
>
> and when I closed the terminal window the USB ports re-enabled.
>
>
>
> On Fri, 13 Aug 2021 at 18:54, Sean Young <sean@mess.org> wrote:
> >
> > Hi Andrew,
> >
> > On Fri, Aug 13, 2021 at 10:21:04AM +1000, Andrew Goff wrote:
> > > Hi, I hope this is the right place for posting this.
> > >
> > > I have the above TV tuner / capture device which has been working well
> > > in Ubuntu 16.04. I've decided to update the OS to Ubuntu 20.04 with a
> > > fresh install on a different disk and haven't been able to get this
> > > device working.
> > >
> > > Ubuntu 21.04, 18.04 have also been tested with the same results. On a
> > > fresh install of 16.04 this device works well.
> > >
> > > It seems something has changed between 16.04 (kernel 4.15.0-142) and
> > > 18.04 (kernel 5.4.0-42).
> > >
> > > In /etc/modprobe.d/dvb.conf
> > > # Sony Play TV
> > > options dvb-usb-dib0700 adapter_nr=5,6 force_lna_activation=1
> > >
> > > This has been tested with different variations of the above without success.
> > >
> > > When using w_scan with a file manager open I've noticed if scanning
> > > adapter6 I could see the folder named adapter5 disappear. I then
> > > opened up the adapter6 folder and two of the four files had
> > > disappeared. When the scan finished the files/folder reappeared,
> > > however the device then became unusable.
> > >
> > > 'modinfo dvb_usb_dib0700 | grep depends' yields the following
> > >
> > > For Ubuntu 18.04
> > > depends:
> > > dib7000m,dib9000,dibx000_common,dvb-usb,dib0090,dib0070,dib3000mc,rc-core
> > >
> > > For Ubuntu 16.04
> > > depends:        dib7000m,dvb-usb,dib0090,dib0070,dib3000mc,rc-core
> > >
> > > So something has changed in the driver?
> > >
> > > Please let me know if any further information is required to help fix this.
> >
> > This does sound like a regression, but we'll have to figure out what
> > caused this. First of all, is there any output in dmesg when the device
> > does not work?
> >
> > Secondly, the best way to track this down is using bisection. Is this
> > something you could do? This would be enormously helpful.
> >
> > https://www.kernel.org/doc/html/latest/admin-guide/bug-bisect.html
> >
> > Thanks,
> >
> > Sean