LinuxQuestions.org
Help answer threads with 0 replies.
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Newbie
User Name
Password
Linux - Newbie This Linux forum is for members that are new to Linux.
Just starting out and have a question? If it is not in the man pages or the how-to's this is the place!

Notices


Reply
  Search this Thread
Old 01-25-2015, 01:45 AM   #1
cncdan
LQ Newbie
 
Registered: Jan 2015
Posts: 1

Rep: Reputation: Disabled
monitor scaling in xorg.conf or video drivers


Hi this is my first post. I'm a Linux user but far from an expert. I'm building a CNC machine and it will be powered by linuxcnc, I may try to compile it for my more modern hardware.

My question is because I have some old cases with touch screen monitors that were likely from some sort of kiosk. The built in monitors have odd Samsung lcd panels with a native resolution of 1024x768 but they are wide screen. They look like 16:9 but could be 16x10. Certainly not 4:3. Thus the pixels are rectangular. The monitors accept higher resolutions so I can output in a wide screen aspect ratio however the image is not sharp because of the down conversion and maybe to some extent the resolutions might be high for the VGA connection.

I'd like the picture to not be squished but with the quality I see when I use the native resolution. So I need to send the monitor an image that's been stretched a little so the monitor can squish it back to the right proportions. I will be using an amd a6 apu fm2 socket since the motherboards for these still often have a parallel header making a mesa FPGA card unnecessary for driving the gecko stepper drivers for this build keeping the costs at a minimum and the setup simple. Do the ati drivers allow scaling independent of output resolution? Is there some way to configure xorg.conf to do this?

Last edited by cncdan; 01-25-2015 at 01:48 AM.
 
Old 01-26-2015, 05:14 AM   #2
business_kid
LQ Guru
 
Registered: Jan 2006
Location: Ireland
Distribution: Slackware & Android
Posts: 7,570

Rep: Reputation: 697Reputation: 697Reputation: 697Reputation: 697Reputation: 697Reputation: 697
Welcome to LQ

One thing to do is write NO xorg.conf, and start X. If your fpga doesn't identify itself as something X recognizes, all this will fall flat. The attempt will write a file /var/log/Xorg.0.log. It's a text file. Read through it for such details as how big the screen thinks it is, etc. You give X a screen size, and a virtual size(by default screen size), and X will draw up the appropriate screen

If you use the vesa driver, all modes will be 4:3
 
  


Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off



Similar Threads
Thread Thread Starter Forum Replies Last Post
Can't properly set up xorg.conf or 10-monitor.conf firekage Arch 9 04-01-2014 11:06 PM
Dual Monitor: 2nd monitor not coming up -- xorg.conf missing something? Hewson Linux - Hardware 3 10-20-2009 12:24 PM
xorg.conf ... anything else I need to backup before messing with video drivers? thomas_r Linux - Newbie 4 01-06-2009 11:25 AM
xorg.conf need monitor section help lesmyer Linux - Software 0 06-14-2006 01:36 PM
Adding Monitor to Xorg.conf susesarus Ubuntu 2 10-30-2005 10:41 AM


All times are GMT -5. The time now is 03:39 PM.

Main Menu
Advertisement
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration