IT: HDMI switching

Discussion in 'UK Motorcycles' started by Catman, Jan 17, 2009.

  1. Catman

    Catman Guest

    OH FOAK, your knowledge, please.

    I have just purchased a new AV amp with HDMI switching. All is good
    apart from one tiny thing.

    My Mac Mini is connected into one of the ports, but it seems to 'forget'
    that the Amp is there when the amp is turned off.

    Everything's fine if I leave the amp on, but if I turn it off, the only
    way I've found to get a picture back from the Mac is to reboot it.

    I've not tried pulling the HDMI plug out to see if that 'reminds' it,
    but it's tempting.

    Any ideas?
    --
    Catman MIB#14 SKoGA#6 TEAR#4 BOTAFOF#38 Apostle#21 COSOC#3
    Tyger, Tyger Burning Bright (Remove rust to reply)
    116 Giulietta 3.0l Sprint 1.7 145 2.0 Cloverleaf 156 V6 2.5 S2
    Triumph Sprint ST 1050: It's blue, see.
    www.cuore-sportivo.co.uk
     
    Catman, Jan 17, 2009
    #1
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  2. Catman

    Pip Guest

    XP Pro, obviously.

    I dunno, when I was a lad and we all used bellwire for speaker cables
    it was all so much simpler.
     
    Pip, Jan 17, 2009
    #2
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  3. Catman

    geoff Guest


    not yet - I've just started trying to play with my TX-SR606 today

    I have my own learning curve to climb

    make and model might be a useful place for you to start
     
    geoff, Jan 17, 2009
    #3
  4. Catman

    geoff Guest

    Just bought some speaker cable which has a 4mm gap between the
    conductors "to minimise crosstalk" ... WTF ???
     
    geoff, Jan 17, 2009
    #4
  5. Catman

    Alex Ferrier Guest

    EDID:

    http://en.wikipedia.org/wiki/EDID

    See under Limitations. Which Amp have you purchased?

    My Onkyo TX-NR905 handles it correctly and I can switch away
    from and return to the HTPC output correctly. I suspect the HDMI
    'link' is maintained even if the source is not currently
    selected.
    If I plug the HTPC directly into the TV however, when I select
    a different source and then return to the HTPC I get the same
    problem as you describe. The only way of waking the connection
    back up I have found, is to physically disconnect and then
    reconnect the HDMI lead.
     
    Alex Ferrier, Jan 18, 2009
    #5
  6. Catman

    Catman Guest

    Yeah, sounds plausible, nothing immediately obvious though. I'll keep
    looking, cheers



    --
    Catman MIB#14 SKoGA#6 TEAR#4 BOTAFOF#38 Apostle#21 COSOC#3
    Tyger, Tyger Burning Bright (Remove rust to reply)
    116 Giulietta 3.0l Sprint 1.7 145 2.0 Cloverleaf 156 V6 2.5 S2
    Triumph Sprint ST 1050: It's blue, see.
    www.cuore-sportivo.co.uk
     
    Catman, Jan 18, 2009
    #6
  7. Catman

    Alex Ferrier Guest

    Arse! I assumed without reading the whole article that it would
    describe the problem. It doesn't. Elsewhere I've seen it reported that
    quite a few graphics cards have problems with EDID and exhibit the problem
    you describe. Though my google mojo, appears to have temporarily deserted
    me.
     
    Alex Ferrier, Jan 18, 2009
    #7
  8. Catman

    Catman Guest

    SONY STRDA2400ES

    Nice it is :)


    --
    Catman MIB#14 SKoGA#6 TEAR#4 BOTAFOF#38 Apostle#21 COSOC#3
    Tyger, Tyger Burning Bright (Remove rust to reply)
    116 Giulietta 3.0l Sprint 1.7 145 2.0 Cloverleaf 156 V6 2.5 S2
    Triumph Sprint ST 1050: It's blue, see.
    www.cuore-sportivo.co.uk
     
    Catman, Jan 18, 2009
    #8
  9. Catman

    Catman Guest

    Not sure what relevance that has? The Mac copes with it fine on boot.
    Just seems stop sending out signals if the AMp is turned on and off.

    It's one of these.

    SONY STRDA2400ES
    Hmm, interesting. PITA but could be OK. I have a little switchbox that
    may sort it out



    --
    Catman MIB#14 SKoGA#6 TEAR#4 BOTAFOF#38 Apostle#21 COSOC#3
    Tyger, Tyger Burning Bright (Remove rust to reply)
    116 Giulietta 3.0l Sprint 1.7 145 2.0 Cloverleaf 156 V6 2.5 S2
    Triumph Sprint ST 1050: It's blue, see.
    www.cuore-sportivo.co.uk
     
    Catman, Jan 18, 2009
    #9
  10. Catman

    Alex Ferrier Guest

    Once the computer loses the EDID info, if 'forgets' how to use the
    display device (in this case, it sees your AV Rx as the display device).
    and hence, no picture.

    Devices are available to sort the problem:

    http://www.gefen.com/kvm/dproduct.jsp?prod_id=4714

    --
    Alex
    BMW R1150GS
    DIAABTCOD#3 MSWF#4 UKRMFBC#6 Ibw#35 BOB#8
    Windy's "little soldier"

    cuore-sportivo.co.uk
     
    Alex Ferrier, Jan 18, 2009
    #10
  11. Catman

    Catman Guest

    Cool ta. Double the price over here as well.

    I'm a tad surprised that the Mac can't be forced to redetect IYSWIM



    --
    Catman MIB#14 SKoGA#6 TEAR#4 BOTAFOF#38 Apostle#21 COSOC#3
    Tyger, Tyger Burning Bright (Remove rust to reply)
    116 Giulietta 3.0l Sprint 1.7 145 2.0 Cloverleaf 156 V6 2.5 S2
    Triumph Sprint ST 1050: It's blue, see.
    www.cuore-sportivo.co.uk
     
    Catman, Jan 18, 2009
    #11
  12. Catman

    Catman Guest

    Turns out that I already had one :)

    Not ideal as I was trying to replace it but it'll do until I find one of
    them gefen things at a sensible price.

    Oddly the Mac still remembers even with teh HDMI switch turned off.....

    Thanks for the help.



    --
    Catman MIB#14 SKoGA#6 TEAR#4 BOTAFOF#38 Apostle#21 COSOC#3
    Tyger, Tyger Burning Bright (Remove rust to reply)
    116 Giulietta 3.0l Sprint 1.7 145 2.0 Cloverleaf 156 V6 2.5 S2
    Triumph Sprint ST 1050: It's blue, see.
    www.cuore-sportivo.co.uk
     
    Catman, Jan 18, 2009
    #12
  13. Catman

    geoff Guest

    Because I needed some speaker cable ...
     
    geoff, Jan 18, 2009
    #13
  14. Catman

    geoff Guest

    Works as an AV amp does it ?

    cunning
     
    geoff, Jan 18, 2009
    #14
  15. Catman

    geoff Guest

    Looks it but

    "It’ll do almost everything you could wish for, but might prove to be
    a difficult beast to set up if you have a lot of equipment."

    Sounds like you still have to find the right menu or something
     
    geoff, Jan 18, 2009
    #15
  16. Catman

    DanB Guest

    I imagine it wasn't that pricey either? I don't use door-bell wire but the
    like, 3rd one up Richer Sounds sells at £2 a metre or something. It has
    some of you crosstalk minimising witch-craft and is sufficiently cheap
    enough to be able to buy loads to make sure I have enough with a load extra
    for future changes and not so expensive as I think "I've bought this because
    it's expensive, knowing it's not gonna be noticeably different...."

    To be fair, going from doorbell wire (it was a rush wire job just getting
    them going prior to a load of mates coming round) to that did make a
    difference, sound was definately clearer and actually a bit louder as well!
     
    DanB, Jan 19, 2009
    #16
  17. Catman

    Catman Guest

    You ain't kidding.
    Could be. Pretty sure Alex had the right of it though.



    --
    Catman MIB#14 SKoGA#6 TEAR#4 BOTAFOF#38 Apostle#21 COSOC#3
    Tyger, Tyger Burning Bright (Remove rust to reply)
    116 Giulietta 3.0l Sprint 1.7 145 2.0 Cloverleaf 156 V6 2.5 S2
    Triumph Sprint ST 1050: It's blue, see.
    www.cuore-sportivo.co.uk
     
    Catman, Jan 19, 2009
    #17
  18. Catman

    geoff Guest

    What I bought a 50m reel of for £40 was slightly better than their
    £2/metre stuff. I used 40 metres of it

    I have a reel of cheaper stuff (which was a tenner for 100m) which would
    have been adequate, but can't find the reel
    the point being that there is no such thing as crosstalk between two
    speaker wires, the voltage seen at the speakers is just the difference
    between the two conductors
    Witchcraft aside, the thicker it is (within reason), the better it can
    handle spikes. If you've paid £1500 for the rest of it, I don't see much
    sense in saving a couple of tenners on connecting them up
     
    geoff, Jan 19, 2009
    #18
  19. Catman

    geoff Guest

    well, it isn't now that I read the original article properly
     
    geoff, Jan 19, 2009
    #19
  20. Catman

    frag Guest

    DanB wibbled...
    It can't possibly be! You'll have the physysysycists shouting at you and
    hitting you over the heads with their oscillyscopy printouts :)
     
    frag, Jan 19, 2009
    #20
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