linux-kernel - Re: Video glitch with Hanftek Astrometa

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Date:   Tue, 22 Aug 2023 15:37:40 +0200
From:   Luigi Baldoni <aloisio@....com>
To:     Bagas Sanjaya <bagasdotme@...il.com>
Cc:     linux-media@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Antti Palosaari <crope@....fi>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Hans Verkuil <hverkuil@...all.nl>
Subject: Re: Video glitch with Hanftek Astrometa

> Sent: Monday, August 21, 2023 at 12:59 PM
> From: "Bagas Sanjaya" <bagasdotme@...il.com>
>
> On Sat, Aug 19, 2023 at 02:03:15PM +0200, Luigi Baldoni wrote:
> >    Hello everyone,
> > last year I replaced my old RTL2832U/R820T DVB-T dongle (which worked
> > perfectly) and replaced it with a Hanftek Astrometa (RTL2832/CXD2837ER)
> > DVB-T2 one and my troubles started.
> > Every channel I tune to shows a periodic glitch, as per included sample.
> >
> > I tried the following things:
> >  * connected a regular TV set to the same antenna cable and the picture looks
> >    fine
> >  * replaced the usb cable
> >  * switched distros (from debian to arch)
> >  * installed a current kernel snapshot
> >  * replaced the minipc on which it's installed
> >  * used usbip to access the hardware from my desktop machine and tested
> >    it directly with vlc, mpv and kaffeine: at best the stream was glitchy
> >    and at worst the app crashed
> >  * toggled every parameter available for each involved module
> >  * ran tzap directly
> >
> > None of the above made the slightest difference, therefore I'm asking you
> > if there's something I might have overlooked or if this is truly a bug.
> >
> > Video sample here, captured with tzap:
> > https://www.mediafire.com/file/qantvq916uy7o4k/rai1hd.ts/file
> > https://www.4shared.com/s/folTulDcljq
> >
>
> (also Cc: RTL2832 and media subsystem maintainers)
>
> What kernel version are you running?

6.1.38-4 on Debian stable.

> Also, can you try with different dongle (ideally with different chipset)?

Alas no. By the way, I noticed the Sony front end is not exactly the same one mentioned
in the linuxtv wiki.

And I should add, I filed a ticket on bugzilla (https://bugzilla.kernel.org/show_bug.cgi?id=217808)
if you think that might be a better avenue to continue the discussion.

Regards