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From: bp@www.zefox.net
Newsgroups: comp.sys.raspberry-pi
Subject: Re: Browser video problems on Bookworm
Date: Thu, 15 May 2025 22:39:06 -0000 (UTC)
Organization: A noiseless patient Spider
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Theo <theom+news@chiark.greenend.org.uk> wrote:
> bp@www.zefox.net wrote:
>> I just found a 10 second ideo on this page which does at least play. 
>> It's silent, however:
>> https://en.wikipedia.org/wiki/Hoverfly
>> 
>> Could the absence of sound be significant? Has anybody tested whether
>> Wayland is the problem? Can't remember if I'm using Wayland or X11 at
>> the moment...
> 
> That video:
> https://en.wikipedia.org/wiki/File:Syrphidae_-_kanagawa_japan_-_2023_11_9.ogv
> source file:
> https://upload.wikimedia.org/wikipedia/commons/4/4d/Syrphidae_-_kanagawa_japan_-_2023_11_9.ogv
> 
> does not contain any sound:
> 
I guessed as much. I  was wondering if the _lack_ of audio in the
file might have something to do with why it played in chromium.
It was the first "no audio" file I encountered since the trouble
started. 

> 
> 
> These ones do:
> https://en.wikipedia.org/wiki/File:I-15bis.ogv
That one doesn't play, beyond opening an empty window.
The run timer stays on 0.0, but the progress arrow 
momentarily starts, then retreats, when the play arrow
is clicked.

> https://en.wikipedia.org/wiki/File:Big_Buck_Bunny_4K.webm

Same empty window, no progress arrow at all.

Not sure what to make of these observations. 

Is there a command to indicate whether the system is running
wayland or x11? I thought there might be some hint in the
dmesg output, but I don't see anything:
dmesg | grep -i wayland
yields no output, 
dmesg | grep -i x11
reports
[    2.297074] xhci-hcd xhci-hcd.0: hcc params 0x0240fe6d hci version 0x110 quirks 0x0000808000000810
[    2.429562] xhci-hcd xhci-hcd.1: hcc params 0x0240fe6d hci version 0x110 quirks 0x0000808000000810
[ 3223.945638] x11: fffffffffffe0000 x10: ffffd06fcfc583a0 x9 : ffffd06fce51cf30
[ 3223.945839]  kthread+0x11c/0x128
which doesn't look relevant, at least to me. 

IIRC, some earlier trouble emerged when using Wayland, which motivated
the use of x11. Now I don't remember which is in use.....

Thanks for writing,

bob prohaska