Ok, pls help, irritating display issue when running secondary db15 port

relaxing · #1 21st June 2011, 12:12 AM

I have been searching and trying to learn but am having an issue with this. I in the system config files I cannot find "system-config-display" or in the xorg directory xorg.conf. I'm new but not blind. I have been trying to use the gui interface for "display" on Gnome3 F15. I want to use the DB15 connector on the laptop and output the same ratio as my laptop LCD resolution but when I try it reverts to a 4:3 ratio, ie 1024x768 and switches both the laptop LCD screen and the large TV LCD screen to both the ratios. If I do or don't select to mirror displays it all reverts to the 1024x768. The laptop setting will give me 1440x900 which is fine, but I don't have that option for the DB15, which the system just identifies as "other".

what file can I edit and where is it located? I am assuming a SVGA db 15 will output other resolutions.

Please and Thanks... Scott

ryptyde · #2 21st June 2011, 01:46 AM

If you have "system-config-display" installed then open a terminal as root (su) and enter

Code:

system-config-display

and then an "xorg.conf" file will be created and it will be located in /etc/X11.

phil

relaxing · #3 21st June 2011, 12:22 PM

[root@localhost scott]# system-config-display
bash: system-config-display: command not found...
[root@localhost scott]#

dknation · #4 21st June 2011, 12:30 PM

Quote:

Originally Posted by ryptyde

If you have "system-config-display" installed then open a terminal as root (su) and enter

Code:

system-config-display

and then an "xorg.conf" file will be created and it will be located in /etc/X11.

phil

First try:

Code:

yum install system-config-display

relaxing · #5 21st June 2011, 02:27 PM

Thanks dk, I tried that but was returned an error that the package did exist, I don't have the exact message as I am at work now.

Scott

Edit: I will try it again tonight, perhaps I made a typo???

goanna300 · #6 14th July 2011, 05:18 AM

Ditto, throughout.
Same issue, same action, same results.
Maybe the last guy found a solution & never posted it.

relaxing · #7 14th July 2011, 11:59 AM

No never found a solution for the db15 port, sorry, there was also a similar thread on this. What I was able to do since my laptop has a DIV digital monitor port is get a DVI to HDMI adapter and use a standard HDMI cable. Once I used the digital connection to the big screen the OS detected the brand and model of my TV, Viewsonic, and gave me a plethora of individual resolutions to choose from. At that time the TV also gave me more options on the screen options in it's menu.

Good luck,

David Batson · #8 15th July 2011, 02:37 AM

You should use xrandr. This is a command line tool. If need be, you can create a bash script to run a batch of commands together.

Google xrandr for info on the appropriate switches to use with it.

Here is one example where I used xrandr in a script file.
http://forums.fedoraforum.org/showpo...81&postcount=4

stevenjd13 · #9 15th July 2011, 04:01 AM

You can use a xrandr to add new resolutions, but they are not permanent. But you can use to test then add the modelines to xorg.conf or make a script to add it when plug in the monitor,

use the cmd 'gtf' this will generate the modeline for a given monitor and refresh rate.

You can see a tut @ http://www.arunviswanathan.com/node/53

to create an xorg.conf file

Code:

su -
service gdm stop
Xorg -configure
#This has generated the file in ~/xorg.conf.new
#add the mode line
cp ~/xorg.conf.new /etc/X11/xorg.conf

Or you can add the comands to the '/etc/profile' file.

Hope that helps