linux-kernel - Re: Video glitch with Hanftek Astrometa

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Message-ID: <ZONDguFpqRTHf_UV@debian.me>
Date:   Mon, 21 Aug 2023 17:59:14 +0700
From:   Bagas Sanjaya <bagasdotme@...il.com>
To:     Luigi Baldoni <aloisio@....com>, linux-media@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Cc:     Antti Palosaari <crope@....fi>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Hans Verkuil <hverkuil@...all.nl>
Subject: Re: Video glitch with Hanftek Astrometa

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?

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

Thanks.

-- 
An old man doll... just what I always wanted! - Clara

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