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Old 02-24-2007, 12:08 AM   #1
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Unhappy switching from CRT to LCD get message "signal over range"

suse 10.1 on a PC has a 15" CRT monitor. No problem after switching from 1200x1024 default resolution of the install to 1024x768 so I could see the print. Switched to LCD 19" monitor and get "signal over range". Put the CRT back on and it works fine again. The LCD will show the boot up text but when it goes to graphic mode it displays the error message.
Old 02-24-2007, 01:12 AM   #2
Registered: Jan 2007
Distribution: Mandriva 2008, Mandrake 2005, Ubuntu 8.04.1
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Need to start system without it starting runlevel 5 and reconfigure X for new monitor. Couple of ways to do this.
One way, with LCD monitor connected, would be to have SuSE boot using failsafe option at boot menu. I'm don't use SuSE so not sure if it sets up a failsafe option. If it does, it should take you to runlevel 1. As root, do command 'init 3'. This should switch you to a mode where you have most of your services, but will not startx. At this point, start whatever utility SuSE provides to configure X, like Xconfigurator. Again, I do not know if SuSE installs that specific command, but give it a try. Once you've accessed whatever X configuration tool SuSE provides, configure you monitor for your LCD. Preferably the make and model but generic LCD will probably work.

Another method would be to edit the /etc/inittab file and change the line 'id:5:initdefault:' to 'id:3:initdefault'. Shutdown, switch monitors then boot up and get to runlevel 3 and configure X.

Another method, with CRT, would be to manually edit /etc/X11/xorg.conf and change the section for monitor. Only problem here is you need to know the specs of the LCD monitor, things like horizontal sync and vertical refresh rate. Here's an example:
Section "Monitor"
    Identifier "monitor1"
    VendorName "Samsung"
    ModelName "Samsung SyncMaster 910N/912N"
    HorizSync 30-81
    VertRefresh 56-85
    ModeLine "1280x1024" 108.0 1280 1328 1440 1688 1024 1025 1028 1066 +hsync +vsync
    ModeLine "768x576" 50.0 768 832 846 1000 576 590 595 630
    ModeLine "768x576" 63.1 768 800 960 1024 576 578 590 616
Yet another way, with LCD, would be to run the install disk but use the update option instead of install. Toward the end of the update, it should allow you to configure your monitor.

As you can see, there are several things you can try. Hope this helps.
Old 03-18-2007, 04:07 AM   #3
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I'm having a similar problem, only it gets more confusing. My main distro is running fine, but I'm tired of it and I'm looking for something better. So I'm installing a couple other distros on the second drive to see how I like them. I can't get the new distros to run the monitor even when I use the exact same xorg.conf file as my main distro! The only thing I change in the xorg file is the driver for the card since the new distros won't have the latest. I leave it set at whatever it was at installation. All the "Screen" settings are identical to the main distro, but I still get the "over range" message displayed on the screen after the splash screen is done. The one distro puts it up before I even get started with the installation. I did get one successful install, and I did exactly what I'm doing now, edited the xorg.conf to match the one I know works. How is it possible for the configuration to work for one and not for all?
Old 03-18-2007, 05:06 AM   #4
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I suspect this is some kind of a bug in the 2.6.18 kernel. Or more likely a bug in Xorg 7.2. I do not remember Fedora Core 5 and Suse 10.1 playing this kind of trick; but of all the latest distributions I have installed (quite, quite many), only Debian Etch somehow managed to get the resolution and refresh rates right (then again, its installer allows setting them manually during install so I may have helped it a bit).

Whatever, the real problem is that the installer does not detect the proper refresh rates, which leads to the infamous "out of range" message that has been confusing so many, especially newbies. I'm curious to know whether this will be solved by Xorg 7.3 and/or more recent kernels.
Old 03-19-2007, 04:46 AM   #5
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I finally relocated the solution I used before. Just add this line to the "monitor" and "screen" sections of the xorg.conf file
Option   "UseEdidFreqs" "1"
Note that that's number 1, not an l. Capitalization is also important. That tells X to scan the monitor and see what it's preferences are. Of course, it didn't help me when the Mepis install CD went over range, nothing to edit there.


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