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ELPDave 02-25-2007 08:24 AM

Video output blanks out then comes back on
 
Hi

I installed FC5 as a server on a Dell Dimension 2400 with 1GB RAM memory and
A 40 GB hard drive.

I am running FC5 in text mode - inittab = 3

My question is about the video output. I am using the integrated video card that came with the machine.

While booting up, I watch the video output stream by. A few times the whole display goes blank for a ½ second then comes on again. When I logon as root, the whole display does blank then comes back and shows I’ve logged on.

When I start a program – Iptables – for example, the cursor drops down one line after pressing return – but there is no video output from the program as it starts.

If I do nothing, the cursor will stay on the line below the command prompt indefinitely with no video output.

When I start another TTY with ALT+2, the whole screen goes blank and stays that way. When I go back to the first TTY with ALT+1, then I see the video output from the program start. The same happens when I start Bind.

But other commands like ls or ps show normal video ouput and response

Would appreciate any help on this. Thanks

ELPDave

stress_junkie 03-07-2007 06:53 PM

Quote:

Originally Posted by ELPDave
While booting up, I watch the video output stream by. A few times the whole display goes blank for a ½ second then comes on again.

That's normal. The monitor will go blank as the video card driver loads. This is due to the automatic synchronization of the monitor with the video card display settings.
Quote:

Originally Posted by ELPDave
When I logon as root, the whole display does blank then comes back and shows I’ve logged on.

This is also normal. The login sequence is going to set your terminal characteristics from the termcap file. It could do any number of things like set the number of columns or the number of rows or the color of the foreground and background. These things are not done by default but the stty function is still used during the log in process.
Quote:

Originally Posted by ELPDave
When I start a program – Iptables – for example, the cursor drops down one line after pressing return – but there is no video output from the program as it starts.
If I do nothing, the cursor will stay on the line below the command prompt indefinitely with no video output.

This happens if you haven't put in enough parameters to create a complete command. It can also happen if you (accidentally) enter the continuation character "\" at the end of the line. This is definitely caused by operator error.
Quote:

Originally Posted by ELPDave
When I start another TTY with ALT+2, the whole screen goes blank and stays that way. When I go back to the first TTY with ALT+1, then I see the video output from the program start. The same happens when I start Bind.

I don't know about this. :scratch:


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