Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!sdd.hp.com!hplabs!hpcc05!hpbbn!hpbbi4!jusch
From: jusch@hpbbi4.BBN.HP.COM (#Juergen Schlanke)
Newsgroups: comp.sys.hp
Subject: Re: X on HP 400 series, multiple screens?>
Message-ID: <1720011@hpbbi4.BBN.HP.COM>
Date: 6 Nov 90 07:32:30 GMT
References: <812@bacchus.esa.oz>
Organization: Hewlett-Packard GmbH
Lines: 53

/ hpbbi4:comp.sys.hp / matt@bacchus.esa.oz (Matthew Atterbury) /  4:40 am  Oct 31, 1990 /
!Does anyone know the answer to any of the following?
!
!    does X run on the HP400 series workstations?
!
!    can any HP400 series w/s work with 2 or more screens (is it physically
!    possible to put more than one graphics card in the box? are the cards
!    independently addressible?, etc)
!
    Yes you can have multiple graphics subsystems on a 400s. The
    question is wether it is supported or not. Here are the supported
    configurations:

    - under DOMAIN/OS only one graphics subsystem is supported (and I
    think only one works as well)

    - under hp-ux two graphical subsystems are supported except one
    configuration : two TurboVRX's. This means you can have a ColorVRX
    and a TurboVRX or two ColorVRX's or one TurboVRX and one PersonalVRX
    etc etc but not two TurboVRX's. 
    Since there was (and I think still is) some confusion here I am
    trying to make sure there are no misunderstandings.

    Anyway there is one caveate. On the second subsystem one cannot have
    a keyboard connected. To have interactivity requires setting up X11
    appropriately and having X handling the input. I tested it and it
    works just fine.

    I also did some performance testing on some configuration. Please
    note that this was done on 7.03 with pre-release HW. Generally there
    is no Performance penalty running with two graphical subsystem.
    Depending on what you are doing the CPU is the limiter. I also
    tested two TurboVRX's and found a performance loss of ~20%.

    You see, things that are not supported still work. We've tested here
    in Boeblingen up to 4 graphics cards in a s300 without big problems.

    I hope this clarifies the situation a little bit more.


HAND (Have A Nice Day)

Juergen

EMC - European Marketing Center

phone:  -49-7031-14-1565
uucp:   {hpfcla!|hpcea!|hpbbn!}hpbbse!jusch
hpdesk: Juergen SCHLANKE / HPB600/51
mail:   Hewlett-Packard GmbH
	JOrgen Schlanke
        Herrenberger Stra^e 130
        D-7031 BNblingen