I am led to believe that external monitors have very little interaction in terms of Monitor to PC. It may be a BIOS issue, try and have a look there. What particular model of laptop do you have?

On Mon, Sep 12, 2011 at 12:20 AM, Andrew 'Dewa' B. Osmond < dewa.nich@gmail.com> wrote:

Here is my complete xorg.conf, Paul.

# Xorg configuration created by system-config-display

Section "ServerLayout" Identifier "single head configuration" Screen 0 "Screen0" 0 0 InputDevice "Keyboard0" "CoreKeyboard" InputDevice "Synaptics" "CorePointer" EndSection

Section "InputDevice" Identifier "Keyboard0" Driver "kbd" Option "XkbModel" "pc105" Option "XkbLayout" "us" EndSection

Section "InputDevice" Identifier "Synaptics" Driver "synaptics" Option "Device" "/dev/input/mice" Option "Protocol" "auto-dev" Option "Emulate3Buttons" "yes" EndSection

Section "Device" Identifier "Videocard0" Driver "openchrome" EndSection

Section "Screen" Identifier "Screen0" Device "Videocard0" DefaultDepth 24 SubSection "Display" Viewport 0 0 Depth 24 Modes "1280x800" "1024x768" "800x600" "640x480" EndSubSection EndSection

The sequence just device -> screen. I have no external device configuration. Maybe you know how to configure external device?

On Sun, Sep 11, 2011 at 8:42 PM, Always Learning centos@u61.u22.netwrote:

...

In my limited experience with notebooks and laptops, I found that repeatedly pressing the keys works. The sequence I found was (not necessarily in this order)

   screen
   external device
   screen and external device

Paul.

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@Christopher Hawker : my laptop version is M54SR, old version of Axioo.

@Robert Heller : VGA or DVI? --> VGA

Which screen is blank? The notebook's or the LCD Projector or both? --> LCD Projector

Is the LCD Projector displaying a message to the effect that an unsupported sync rate or video mode in being used? --> No. Nothing's happen. Just blank screen. I think it's becaused lcd projector mode maybe doesn't same with xorg but I don't know how to configure it.

On Sun, Sep 11, 2011 at 9:25 PM, Robert Heller heller@deepsoft.com wrote:

At Sun, 11 Sep 2011 20:34:30 +0700 CentOS mailing list centos@centos.org wrote:

...

dear guys,

I have a problem between my CentOS 5.5 (on Axioo notebook) and LCD Projector. When I connect my notebook to LCD Projector, it can detect my notebook.

VGA or DVI?

...

But when I press Fn + F7 to activate dual monitor between my notebook and LCD Projector it goes to blank screen. FYI, the LCD Projector is NEC but

I

...

don't know the series.

Which screen is blank? The notebook's or the LCD Projector or both?

...

I've tried to change display using dual head monitor but it has no

effects.

There are two different things going on here.

"dual head monitor" normally means that the two monitors display *different* stuff. This *usually* implies that the *video card* specificly supports two independent monitors, usually by having two frame buffers and two video outputs. This usually also implies *two* Device sections in xorg.conf, eg you (logically) have two video cards installed (even if they are both on the same physical 'card' or even same physical 'chip').

*Most* laptops/notebooks DON'T have "dual head monitor" capable video cards. What they have is a video output that goes to a logical "Y" connection: *one* frame buffer+video output circuit, going to two video connections, one being the internal LCD and the other being the VGA (or DVI with newer laptops/notebooks) connector.

The Fn + F7 generally toggles between two or three states:

Video goes to the internal screen. Video goes to the external screen. Video goes to both screens (*some* laptops/notebooks can't do this, esp. if the scan rates are incompatible).

In all cases there is only one video 'Device'. The Fn + F7's logic is like pluging in different monitors into the *one* video output connection on a desktop.

...

Do I need some driver??

Probably not. It might be that you need to have different things in your Screen section, partitularly in the Display SubSection. It might be that the LCD Projector cannot handle the display mode(s) specificed. Is the LCD Projector displaying a message to the effect that an unsupported sync rate or video mode in being used?

...

and this is my xorg configuration : Section "Device" Identifier "Videocard0" Driver "openchrome" EndSection

Section "Screen" Identifier "Screen0" Device "Videocard0" DefaultDepth 24 SubSection "Display" Viewport 0 0 Depth 24 Modes "1280x800" "1024x768" "800x600" "640x480" EndSubSection EndSection

Hope you guys can help me. Thanks.

Andrew.

MIME-Version: 1.0

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A long time ago I did this. I think I was using Suse 9.3 at the time. (That's how long ago it was!!) It was so easy-- taking less than a minute-- that I don't remember how I did it.

My "muttbox" is a Dell i600m. <Fn><F8> is the key to switch among the video options we're talking about. This probably isn't any kind of a standard, but unless you're positive <Fn><F7> is the right key combo, you might want to try <Fn><F8>.

Make sure the projector is plugged in and then turned on before hitting the CRT combo.

If an error reports the sync rate is different on the projector, change the specs running the LCD (internal) monitor.

I didn't have to do this, but it might help in your situation: with things connected, turned on, and set up as above, restart hal. This will kick it to do a hardware rescan. (This has worked for me hotplugging other hardware... never tried it in a projector (2nd monitor) situation.)

Hope you get this working. If/When you do, please report back how. I'm sure someone else will need to know how to do this before long.

On 09/11/2011 10:52 AM Andrew 'Dewa' B. Osmond wrote:

@Christopher Hawker : my laptop version is M54SR, old version of Axioo.

@Robert Heller : VGA or DVI? --> VGA

Which screen is blank? The notebook's or the LCD Projector or both? --> LCD Projector

Is the LCD Projector displaying a message to the effect that an unsupported sync rate or video mode in being used? --> No. Nothing's happen. Just blank screen. I think it's becaused lcd projector mode maybe doesn't same with xorg but I don't know how to configure it.

On Sun, Sep 11, 2011 at 9:25 PM, Robert Heller <heller@deepsoft.com mailto:heller@deepsoft.com> wrote:

At Sun, 11 Sep 2011 20:34:30 +0700 CentOS mailing list
<centos@centos.org <mailto:centos@centos.org>> wrote:

 >
 >
 >
 > dear guys,
 >
 > I have a problem between my CentOS 5.5 (on Axioo notebook) and LCD
 > Projector. When I connect my notebook to LCD Projector, it can
detect my
 > notebook.

VGA or DVI?

 > But when I press Fn + F7 to activate dual monitor between my
notebook and
 > LCD Projector it goes to blank screen. FYI, the LCD Projector is
NEC but I
 > don't know the series.

Which screen is blank? The notebook's or the LCD Projector or both?

 > I've tried to change display using dual head monitor but it has
no effects.

There are two different things going on here.

"dual head monitor" normally means that the two monitors display
*different* stuff.  This *usually* implies that the *video card*
specificly supports two independent monitors, usually by having two
frame buffers and two video outputs.  This usually also implies *two*
Device sections in xorg.conf, eg you (logically) have two video cards
installed (even if they are both on the same physical 'card' or even
same
physical 'chip').

*Most* laptops/notebooks DON'T have "dual head monitor" capable video
cards.  What they have is a video output that goes to a logical "Y"
connection: *one* frame buffer+video output circuit, going to two video
connections, one being the internal LCD and the other being the VGA (or
DVI with newer laptops/notebooks) connector.

The Fn + F7 generally toggles between two or three states:

Video goes to the internal screen.
Video goes to the external screen.
Video goes to both screens (*some* laptops/notebooks can't do this, esp.
if the scan rates are incompatible).

In all cases there is only one video 'Device'.  The Fn + F7's logic is
like pluging in different monitors into the *one* video output
connection on a desktop.


 > Do I need some driver??

Probably not.  It might be that you need to have different things in
your Screen section, partitularly in the Display SubSection.  It might
be that the LCD Projector cannot handle the display mode(s) specificed.
Is the LCD Projector displaying a message to the effect that an
unsupported sync rate or video mode in being used?

 >
 > and this is my xorg configuration :
 > Section "Device"
 >         Identifier  "Videocard0"
 >         Driver      "openchrome"
 > EndSection
 >
 > Section "Screen"
 >         Identifier "Screen0"
 >         Device     "Videocard0"
 >         DefaultDepth     24
 >         SubSection "Display"
 >                 Viewport   0 0
 >                 Depth     24
 >                 Modes    "1280x800" "1024x768" "800x600" "640x480"
 >         EndSubSection
 > EndSection
 >
 > Hope you guys can help me. Thanks.
 >
 >
 > Andrew.
 >
 > MIME-Version: 1.0
 >
 > _______________________________________________
 > CentOS mailing list
 > CentOS@centos.org <mailto:CentOS@centos.org>
 > http://lists.centos.org/mailman/listinfo/centos
 >
 >

--
Robert Heller             -- 978-544-6933 <tel:978-544-6933> /
heller@deepsoft.com <mailto:heller@deepsoft.com>
Deepwoods Software        -- http://www.deepsoft.com/
()  ascii ribbon campaign -- against html e-mail
/\  www.asciiribbon.org <http://www.asciiribbon.org>   -- against
proprietary attachments



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