Configuring X from the command line

elreteipos · #1 23rd April 2006, 07:53 PM

After installing FC5, X Window doesn't work. Maybe I've misconfigured something, so I want to reconfigure X from the command line. I know that Red Hat used to have xconfig or xconf86 or something similar, but that seems to be unavailable. What should I do now?

steve1961 · #2 23rd April 2006, 08:01 PM

Easiest way is to logon as root, type setup, and choose the option to configure x. By the way, the config file is /etc/X11/xorg.conf You can also edit this directly from the command line using something like vi or nano.

ItsTheSource · #3 23rd April 2006, 08:57 PM

Code:

Xorg -configure

attempts to configure everything for you. You'll probably have to manually edit xorg.conf for mouse & graphics though. More Here

elreteipos · #4 24th April 2006, 05:16 PM

I've been able to fix it, but I can't use a resolution higher than 800x600. If I try that, the screen goes blank again. This should not be a problem, because I'm able to use 1024x768 on Windows. I also checked if FC5 is running the right drivers, and it does, so that is not part of the problem. Is there anything else I can try?

Also, I can't use Add/Remove Programs because I get an error. The same thing happens when I try to install an RPM.

steve1961 · #5 24th April 2006, 05:23 PM

You could try editing /etc/X11/xorg.conf. In the screen section make sure that you set "1024x768" as the default resolution. I have 24 bit as the default colour depth so the relevant line looks like thi for a 1280x1024 display:

SubSection "Display"
Depth 24
Modes "1280x1024"

While you're at it double check the horizontal and vertical refresh rates - use the screen manual or google to get the correct entries.

elreteipos · #6 24th April 2006, 05:52 PM

My screen is a VERY old one so it will be hard to figure that out...

Edit: I'm using a Laser Computer LS6928/15SC screen, manufactured in 1997.

Edit 2: I just found out that I can get the frequencies using the on screen display of my monitor. FH: 68.5KHZ and FV: 84.8HZ.

steve1961 · #7 24th April 2006, 05:58 PM

Quote:

Originally Posted by elreteipos

My screen is a VERY old one so it will be hard to figure that out...

Edit: I'm using a Laser Computer LS6928/15SC screen, manufactured in 1997.

In that case just try changing the resolution.

elreteipos · #8 24th April 2006, 06:12 PM

Quote:

Originally Posted by steve1961

In that case just try changing the resolution.

I already tried that, but it doesn't work. I'll try the frequency thing.

steve1961 · #9 24th April 2006, 06:30 PM

My values are very conservative, you could try these if you want to test them out:

HorizSync 31.5-67.0
VertRefresh 50.0-75.0

Failing that you could use a modeline. See here:

http://www.fedoraforum.org/forum/sho...d.php?t=101265

elreteipos · #10 24th April 2006, 07:39 PM

Not working here. Too bad... :-(

steve1961 · #11 24th April 2006, 08:03 PM

Quote:

Originally Posted by elreteipos

Not working here. Too bad... :-(

Not sure what else to suggest. Anybody else have any ideas?

Seve · #12 24th April 2006, 08:27 PM

Quote:

Originally Posted by elreteipos

Not working here. Too bad... :-(

Hello:
Can you look in your Xorg.log and filter for maximum pixel clock .. it will be expressed in MHz and post the output?
Then from a terminal try $ gtf 1024x768 85
and post the output.
Seve

elreteipos · #13 25th April 2006, 06:47 PM

What is Xorg.log and where can I find it?

Quote:

Originally Posted by Seve

Then from a terminal try $ gtf 1024x768 85
and post the output.

I assume you meant "gtf 1024 768 85" (without the 'x'). Anyway, I got the output:

Quote:

[root@localhost ~]# gtf 1024 768 85

# 1024x768 @ 85.00 Hz (GTF) hsync: 68.60 kHz; pclk: 94.39 MHz
Modeline "1024x768_85.00" 94.39 1024 1088 1200 1376 768 769 772 807 -HSync +Vsync

[root@localhost ~]#

steve1961 · #14 25th April 2006, 07:33 PM

You can find xorg.0.log in /var/log if that's of any help.