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Old 05-16-2006, 02:54 PM   #1
sidra
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Registered: Oct 2004
Location: USA
Distribution: Fedora Core 3, Red Hat 9, CentOS 4.2, Mandriva, Ret Hat Enterprise Linux 4.0
Posts: 116

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XServer not starting in CentOS 4.2


I've run into a little problem. I'm using CentOS 4.2 at work. I installed CentOS while the box was connected to my monitor. Now when the another monitor was connected to it, it obviously could get no signal.

So i logged on in Single User Mode trying to run various commands; setup, xorgconfig, xconfig, startx, system-config-display. I'm logged on as root. They either are not available or don't work on CentOS! I checked the kernel configuration as well but i don't see anything there which would help me detect/reconfigure the new monitor. And i'm not sure how i should modify the xorg.conf file...

Any ideas?
 
Old 05-18-2006, 01:31 AM   #2
davcefai
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Registered: Dec 2004
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Possibly the new monitor is less capable than the old one and needs to work at lower frequncies.

I am not familiar with CentOS but as far as xorg.conf goes I suggest you edit it and reduce the higher end of the frequency ranges:
Code:
Section "Monitor"
    Identifier     "Generic Monitor"
    DisplaySize     280    210
    HorizSync       30.0 - 70.0
    VertRefresh     50.0 - 100.0
    Option         "DPMS"
EndSection
Try 30-60 for HorizSync and 50 to 60 for Vert Refresh. (or look at the manual if you have it)
 
Old 05-18-2006, 06:02 PM   #3
sidra
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Registered: Oct 2004
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Distribution: Fedora Core 3, Red Hat 9, CentOS 4.2, Mandriva, Ret Hat Enterprise Linux 4.0
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Major problem fixed

Thanks but i already figured it out. It was actually the display size field of the Monitor section, i changed it to 1024 and 768.

But i'm not sure if this was the correct way to do it. I got the X server up and running, however the text on the login screen was minute. It's weird. I'm not sure how that had an impact. When i login everything is fine. Just the text on the login screen is very very small. The frequency ranges were close to what you suggested.

Any idea?

Thanks,
Sid
 
Old 05-19-2006, 12:36 AM   #4
davcefai
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Registered: Dec 2004
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Actually, in most cases, you shouldnot need to use the Displaysize parameter. XOrg interrogates the monitor to get the info. (Old monitors may nor respond either)

I have to use it 'cos my KVM switch doesn't pass the data.

Try commenting out that line.
 
  


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