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Old 03-24-2006, 03:27 PM   #1
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Black Screen after monitor change

I just installed RHAS 3 U3. During the installation, I had a flatpanel monitor(Veiwsonic VA912b) attached. The installation was successful with no problems.

After the install, I disconnected the flatpanel and attached a CRT (Viewsonic G771). Now, when I boot up, I see the boot process but as soon as X is started the CRT screen is black (you can see some refresh going on but in general it's all black).

How can I get to a shell (bypass X) and reconfigure X for the CRT?

Thanks for any help.

Old 03-24-2006, 04:50 PM   #2
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Wait a few minutes (no need to boot into runlevel 3).

Press the three key combo of Ctrl+Alt+F1

Log on as root (supply the password when promted)

Type; init 3

Run; redhat-config-xfree86

Test; startx

If happy, exit the GUI session type; init 5

Go back to the console screen (Ctrl+Alt+F1) and logout, press the three key combo of Ctrl+Alt+F7 to get back to the GUI screen.
Old 03-28-2006, 04:39 PM   #3
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Thanks for the "CTRL-ALT-F1" key combo, it worked fine. I was told the combo was "CTRL-ALT-BACKSPACE", but that did not work.

Ok. After I run /usr/bin/redhat-config-xfree86 the screen goes blank again with no results. CTRL-C gets me back to a prompt.

Any ideas as to what I am doing wrong?

Thanks for any help.
Old 03-28-2006, 05:32 PM   #4
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Disregard my last post. Solution found.

I ran '/usr/bin/redhat-config-xfree86 --reconfig' and it re-probed my video card and monitor.

Thank you for the help.


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