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A/V problems while the Pi is doing nothing

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I have a RPi5 hooked up to a TV, and I watch movies or TV programs or what
have you by streaming them on the Pi and sending them to the TV via HDMI.

I assume this is something that most of you have done at some point.

I turn the TV off (really it goes into its low power mode) and leave the
RPi on.

Occasionally, when I turn the TV on to watch something, there are two
things wrong:
(1) The video no longer matches the TV screen size (1920x1080 in this case).
    The video is slightly larger, in that the edges of the picture are
    off-screen.
(2) The sound is no longer coming through the HDMI (or, at least, the TV
    remains silent).

I can get things working again by running the command
        xrandr --size 800x600  ;  sleep 1 ; xrandr --size 1920x1080
(I have no idea why this gets the sound working.)

Having a work-around is fine, but I'm wondering if anyone else has seen
this issue.  I don't know whether it is
-> a Pi hardware issue
-> a Pi software issue, or
-> a glitch in my TV (Sony Bravia, FWIW).

Anyone?

                                Jim

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A/V problems while the Pi is doing nothing Jim Diamond <zsd@jdvb.ca> - 2026-03-14 19:57 -0300
  Re: A/V problems while the Pi is doing nothing ottitale <ottitale@o2mail.de> - 2026-03-15 07:29 +0100
    Re: A/V problems while the Pi is doing nothing Jim Diamond <zsd@jdvb.ca> - 2026-03-15 17:51 -0300
      Re: A/V problems while the Pi is doing nothing ottitale <ottitale@o2mail.de> - 2026-03-16 03:10 +0100
        Re: A/V problems while the Pi is doing nothing Jim Diamond <zsd@jdvb.ca> - 2026-03-16 13:54 -0300
  Re: A/V problems while the Pi is doing nothing Andy Burns <usenet@andyburns.uk> - 2026-03-15 10:53 +0000
    Re: A/V problems while the Pi is doing nothing Jim Diamond <zsd@jdvb.ca> - 2026-03-15 17:54 -0300
      Re: A/V problems while the Pi is doing nothing Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-03-15 22:18 +0000
        Re: A/V problems while the Pi is doing nothing Jim Diamond <zsd@jdvb.ca> - 2026-03-16 13:56 -0300
          Re: A/V problems while the Pi is doing nothing Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-03-16 22:54 +0000
            Re: A/V problems while the Pi is doing nothing Jim Diamond <zsd@jdvb.ca> - 2026-03-17 17:59 -0300
        Re: A/V problems while the Pi is doing nothing Jim Diamond <zsd@jdvb.ca> - 2026-03-17 17:57 -0300
      Re: A/V problems while the Pi is doing nothing The Natural Philosopher <tnp@invalid.invalid> - 2026-03-16 12:41 +0000
        Re: A/V problems while the Pi is doing nothing Jim Diamond <zsd@jdvb.ca> - 2026-03-17 17:59 -0300

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