Dual head on a Powerbook

Dual head on a Powerbook

[Tim Wojtulewicz]

I'm trying to connect a projector to the monitor port on the back of my
powerbook, so I can do a presentation with it.  Anyone have any
information on dual headed support on powerbooks?  Pismo, LinuxPPC2000,
2.2.15pre19

Tim


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Re: Dual head on a Powerbook

[erik cameron]

i was trying to do this a while ago (lombard, linuxppc1999, pre11) and
didn't have any luck.  i think there was some talk of support, but
the code simply isn't there.  (it also doesn't support waking from the
usb bus yet; if you want to use the external monitor on these instead
of the lcd, under macos you would sleep it, close it and wake it from
the external keyboard.  which isn't an option yet, iirc.)

please, if i was just being silly and i'm wrong, correct me.  i'd love
to know how to do this too.  :)

on 04/25/00, 15:18:07 -0700, Tim Wojtulewicz said...
>
> I'm trying to connect a projector to the monitor port on the back of my
> powerbook, so I can do a presentation with it.  Anyone have any
> information on dual headed support on powerbooks?  Pismo, LinuxPPC2000,
> 2.2.15pre19
>
> Tim
>
>
>

--
erik cameron  unix systems administrator
jfi/mrsec @ the university of chicago
e-cameron@uchicago.edu
http://senta.uchicago.edu/gnupg for public key

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Re: Dual head on a Powerbook

[FASSINO Jean-Philippe]

Tim Wojtulewicz wrote:

> I'm trying to connect a projector to the monitor port on the back of my
> powerbook, so I can do a presentation with it.  Anyone have any
> information on dual headed support on powerbooks?  Pismo, LinuxPPC2000,
> 2.2.15pre19

I'm doing this using Xpmac and booting with BootX.
First configure external display to be primary in MacOS (be
careful with depth color !).
Next, start Linux which display on external monitor.
This method work only with Xpmac and not with FBDev (3.3.x).

JP


--
--------------------------------------------------------------------------
 Jean-Philippe FASSINO              France Telecom R&D : DTL/ASR
 Tel : 04 76 76 45 52
 mailto:jeanphilippe.fassino@francetelecom.fr
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Re: Dual head on a Powerbook

[Michael Schmitz]

> I'm trying to connect a projector to the monitor port on the back of my
> powerbook, so I can do a presentation with it.  Anyone have any
> information on dual headed support on powerbooks?  Pismo, LinuxPPC2000,
> 2.2.15pre19

Unless the video controller in that box can handle two ports from one
chipset, you won't get dual headed display. On the Lombard, MacOS seemed
to handle this situation, and I got the display set up in MacOS to show
the same desktop on both screens, then booted Linux and the display came
up on the attached projector only. Somewhat of a hassle but it worked.

	Michael


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Re: Dual head on a Powerbook

[Tim Wojtulewicz]

FASSINO Jean-Philippe wrote:

> Tim Wojtulewicz wrote:
>
> > I'm trying to connect a projector to the monitor port on the back of my
> > powerbook, so I can do a presentation with it.  Anyone have any
> > information on dual headed support on powerbooks?  Pismo, LinuxPPC2000,
> > 2.2.15pre19
>
> I'm doing this using Xpmac and booting with BootX.
> First configure external display to be primary in MacOS (be
> careful with depth color !).
> Next, start Linux which display on external monitor.
> This method work only with Xpmac and not with FBDev (3.3.x).

I tried this just now and it didn't work.  In MacOS, I have the monitor set
to 1024x768 at thousands of colors.  Both monitors display the same image.
When I boot back to Linux, something flashes on the external monitor.  It
says something about OF, but it disappears to fast for me to read it fully.
Then the image disappears, and nothing else appears on the external monitor.
I am using the latest (rev 9) Xpmac.

Tim


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Re: Dual head on a Powerbook

[FASSINO Jean-Philippe]

Tim Wojtulewicz wrote:

> FASSINO Jean-Philippe wrote:
>
> > Tim Wojtulewicz wrote:
> >
> > > I'm trying to connect a projector to the monitor port on the back of my
> > > powerbook, so I can do a presentation with it.  Anyone have any
> > > information on dual headed support on powerbooks?  Pismo, LinuxPPC2000,
> > > 2.2.15pre19
> >
> > I'm doing this using Xpmac and booting with BootX.
> > First configure external display to be primary in MacOS (be
> > careful with depth color !).
> > Next, start Linux which display on external monitor.
> > This method work only with Xpmac and not with FBDev (3.3.x).
>
> I tried this just now and it didn't work.  In MacOS, I have the monitor set
> to 1024x768 at thousands of colors.  Both monitors display the same image.
> When I boot back to Linux, something flashes on the external monitor.  It
> says something about OF, but it disappears to fast for me to read it fully.
> Then the image disappears, and nothing else appears on the external monitor.
> I am using the latest (rev 9) Xpmac.

Do not use same display on external and internal monitor. And set external to
primary.
Start Xpmac with option "-depth 32" or "-depth 16".
I think you need Xpmac rev10 at :

http://khendricks.ivey.uwo.ca/Xpmac/

And it must work !

JP

--
--------------------------------------------------------------------------
 Jean-Philippe FASSINO              France Telecom R&D : DTL/ASR
 Tel : 04 76 76 45 52
 mailto:jeanphilippe.fassino@francetelecom.fr
--------------------------------------------------------------------------


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Re: Dual head on a Powerbook

[Jean-Jacques Levy]

Already asked this question on Sun, 21 Nov 1999. And on Mon, 3 Jan 2000.
On Tue, 4 Jan 2000, there was following answer from Benh:

 "features like mirroring and multi-head provided by the
  Rage LT and LT Pro video controllers of the PowerBook are not enabled by
  Linux drivers. I know Brad Midgley is working on implementing the LT Pro
  multihead. It would probably be possible to more easily enable simple
  mirroring if someone takes the time to hack into the driver."

In the linuxcare web page, it's mentioned that

  "the video acceleration problem is truly weird, you can write to
   certain registers and only some bits go in, the other bits are stuck."

Myself, for a presentation, I boot (No Video Driver option) with video
on the external projector, and blank screen on LCD. It works; it's
very unconvenient; it's with Xpmac (otherwise too slow).

I would love to know current status. Is it not simpler to make a patch
for video mirroring? Which is enough for presentations.  Multihead is
a luxurious solution.

-JJ-

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Re: Dual head on a Powerbook

[Tim Wojtulewicz]

At 11:25 PM +0200 4/26/00, Jean-Jacques Levy wrote:
>Already asked this question on Sun, 21 Nov 1999. And on Mon, 3 Jan 2000.
>On Tue, 4 Jan 2000, there was following answer from Benh:
>
>  "features like mirroring and multi-head provided by the
>   Rage LT and LT Pro video controllers of the PowerBook are not enabled by
>   Linux drivers. I know Brad Midgley is working on implementing the LT Pro
>   multihead. It would probably be possible to more easily enable simple
>   mirroring if someone takes the time to hack into the driver."
>
>In the linuxcare web page, it's mentioned that
>
>   "the video acceleration problem is truly weird, you can write to
>    certain registers and only some bits go in, the other bits are stuck."
>
>Myself, for a presentation, I boot (No Video Driver option) with video
>on the external projector, and blank screen on LCD. It works; it's
>very unconvenient; it's with Xpmac (otherwise too slow).
>
>I would love to know current status. Is it not simpler to make a patch
>for video mirroring? Which is enough for presentations.  Multihead is
>a luxurious solution.
>
>-JJ-

I've tried a couple of things, including setting up the video
settings in MacOS and restarting to linux.  That doesn't work.  At
the point where the display is first "initiailized", some text
appears on the external monitor.  I haven't been able to read the
message completely and write it down, but I know it has some thing to
do with "OF quiescence" and "fake <something>".  I'm not to
experienced with the PPC drivers and such, so I would have no idea
what these mean.

My current setup is now:  Pismo Powerbook, LinuxPPC 2000, current
linux-pmac-stable kernel (2.2.15-pre19), Xpmac.rev10

Tim
--

-------
Tim Wojtulewicz           Tim.Wojtulewicz@nau.edu
(520)523-2543             http://dana.ucc.nau.edu/~tjw4

In the Windows world, you are one click away from
harming yourself -- Elias Levy, Bugtraq

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