Thursday, November 29, 2007

Monitor Goes Black after booting

I am getting too many mails regarding this.


While booting we might get vertical / horizontal Frequency out of sync. This is a indicator that your monitor does not support the frequency Linux is expecting, so the monitor shuts down resulting in Black / Blank screen.
There are two main scenarios
  1. LiveCD boots to a blank monitor.
  2. After Install the Monitor is blank.
In both the cases, the problem is xorg.conf.
This mostly happens when the display driver settings are incorrect in /etc/X11/xorg.conf file.

Resolution: Most current system offer a "safe mode" boot.
  1. On Ubuntu it is called "Safe Graphics Mode".
    Similar options are there for Kubuntu.
  2. On PCLinuxOS it is called "Video Safe Mode FBDev" or " Video Safe Mode Vesa".
  3. OpenSUSE, the Live CD unfortunately does not have any "safe Mode", Please read my previous article to tackle OpenSUSE.

I am sure that other Distributions also offer Similar boot options.

Once installed, the best bet is to use "Failsafe" option. If it fails try the method listed for OpenSUSE, it should work most of the time. If you are not able to still resolve the issue, please mail me the exact distribution, I'll give it a try with the latest version of the distro.
I know I have not covered many other distributions like Fedora, Mandriva, Mepis, Sabayon etc. Please leave comment regarding how you have resolved this issue on these distributions. I have not tried them as I do not use them, but can if required.


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