Mini DisplayPort & TB = why the same connector?

Discussion in 'Mac Pro' started by Loa, Jul 20, 2011.

  1. Loa macrumors 65816

    Loa

    Joined:
    May 5, 2003
    Location:
    Québec
    #1
    Hello,

    Information about this subject seems sparse and contradictory. Is TB backwards compatible whit mini DP?

    For example, could I plug an Apple Cinema Display (with mini DP) directly into the MacBook Air's TB port?

    Or daisy chain an Apple Cinema Display into an Apple TB display plugged into that MacBook air?

    Thanks

    Loa
     
  2. simsaladimbamba

    Joined:
    Nov 28, 2010
    Location:
    located
    #2
    Can this help, as it answers some of your questions?
     
  3. FrankHahn macrumors 6502a

    Joined:
    May 17, 2011
    #3
    Yes, you can plug mDP Cinema Display into a TB Air.
    Yes, your can daisy chain a mDP Cinema Display using a TB Air. But you have to have the mDP Cinema Display at the end of the chain.
     
  4. Loa thread starter macrumors 65816

    Loa

    Joined:
    May 5, 2003
    Location:
    Québec
    #4
    Hello,

    Thanks for the (obvious, my bad) link, and the daisy chain info.

    One last bit of info I didn't manage to find: would the new Apple TB display work when plugged into a regular mini DP port? My guess is that it would only work as a display, and that none of the other ports would work.

    Loa
     
  5. MovieCutter macrumors 68040

    MovieCutter

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    Location:
    Washington, DC
    #5
    Ding ding ding! You WIN!!!
     
  6. deconstruct60, Jul 20, 2011
    Last edited: Jul 20, 2011

    deconstruct60 macrumors 604

    Joined:
    Mar 10, 2009
    #6
    Is there some Apple manual or support doc that says that?

    The tech spec page ( granted out of the marketing/sales folks of late) says no:

    "System Requirements: Thunderbolt-enabled Mac computer, including MacBook Air, MacBook Pro, Mac mini, and iMac "
    http://www.apple.com/displays/specs.html

    Also Intel's docs

    " ... A Thunderbolt connector on a computer is capable of connecting with a cable to Thunderbolt products or to DisplayPort devices. ... Compatibility with DisplayPort devices is provided by an interoperability mode between host devices and DisplayPort products; if a DisplayPort device is detected, a Thunderbolt controller will drive compatibility mode DisplayPort signals to that device. ... "
    http://www.intel.com/technology/io/thunderbolt/325136-001US_secured.pdf

    In the Apple Display case the device is the DisplayPort device. It is not the host (at least in the normal usage of the word). Folks are assuming it is has compatiblity mode in both directions as opposed to as a just the primary host or a leaf node on a daisy chain network.
     
  7. xper macrumors 6502

    xper

    Joined:
    Dec 15, 2005
    Location:
    Sweden - Halmstad
    #7
    Ofcourse they have to write that, to use all of the features of the TB Display (ethernet, usb, firewire, speakers, mic, webcamera) they need a Thunderbolt equiped Mac, but the new display still works with all other Display Port equiped computers, but then you only can use the screen itself, not the other features.
     
  8. deconstruct60 macrumors 604

    Joined:
    Mar 10, 2009
    #8
    May not work. Only because the MBA probably can't drive 3 monitors (internal panel , TB Display , and mDP Display ) . It is only 200-300 MB of integrated graphics memory. A MBP 15" or 17" yes.

    Using mDP because the last time Apple tried this

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

    The non standard connector was an impediment to adoption. This way even if there are no TB devices out there (just like it launched) people can still use the port.
     
  9. deconstruct60 macrumors 604

    Joined:
    Mar 10, 2009
    #9
    It is trivial to put a little asterisk or mark next to that and put some short sentence at the bottom saying "there is a diminished capacity mode where ports don't work" if that is really true. That would sell more devices to more folks. As written anyone with a DP would walk away ( as it isn't really a requirement.)

    For example a game the would work in a minimal mode with OpenGL 2.1 but needed 3.1 for 'advanced features' .
     
  10. xper macrumors 6502

    xper

    Joined:
    Dec 15, 2005
    Location:
    Sweden - Halmstad
    #10
    I have no idea why you keep writing in several threads that this new thunderbolt display may not work with computers that just have DP, it works, stop confusing people.
     
  11. mcmaklin macrumors newbie

    Joined:
    Aug 21, 2011
    #11
    connecting 2 displays with minidisplay cables possible?

    It is not clear for me please answer:
    I need to put my MBPro far from my table (in another room and use it in mode with closed lid) but TB cables can be only 1,5 metres long

    Is it possible to use 2 MINI display cables instead of TB cables to connect 2 newest Apple displays to my MB Pro this way:

    MacBookPro ----> AppleCinemaDisplay1 connected with Minidisplay cable to MBPro -----> AppleCinemaDisplay2 connected with MiniDisplay cable (to TB port of Display1)?

    or

    MacBookPro --> TB HDD Raid connected with TB cable ---> AppleCinemaDisplay1 connected with minidisplay cable to the TB port of HDDRaid -----> AppleCinemaDisplay2 connected with minidisplay cable to the TB port of Display1
     
  12. Loa thread starter macrumors 65816

    Loa

    Joined:
    May 5, 2003
    Location:
    Québec
    #12

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