@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 at deepsoft.com> wrote: > At Sun, 11 Sep 2011 20:34:30 +0700 CentOS mailing list <centos at 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 at centos.org > > http://lists.centos.org/mailman/listinfo/centos > > > > > > -- > Robert Heller -- 978-544-6933 / heller at deepsoft.com > Deepwoods Software -- http://www.deepsoft.com/ > () ascii ribbon campaign -- against html e-mail > /\ www.asciiribbon.org -- against proprietary attachments > > > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20110911/ac67c22f/attachment-0005.html>