OpenGL not working in the root terminal

Turin Turambar · 03-31-2005, 06:38 PM

Before a few days I could start, for example glxgears in the root terminal, now I cannot!
It says glxgears: Error: couldn't open display '(null)'

If I start that program in the regular shell, it works normally. How come that root term does not work now?!

SuSE is 9.2 PRO

Bruce Hill · 03-31-2005, 06:54 PM

I don't know about SuSE, but in Slackware glxgears is not in the $PATH for root.

Code:

root@james:/home/mingdao/build# glxgears
bash: glxgears: command not found
root@james:/home/mingdao/build# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/usr/sbin:/bin:/usr/bin
root@james:/home/mingdao/build# exit
exit
mingdao@james:~/build$ glxgears
X connection to :0.0 broken (explicit kill or server shutdown).
mingdao@james:~/build$ echo $PATH
/usr/local/bin:/usr/bin:/bin:/usr/X11R6/bin:/usr/games:/opt/www/htdig/bin:/usr/lib/java/bin:/usr/lib/java/jre/bin:/opt/kde/bin:/usr/lib/qt/bin:/usr/share/texmf/bin:.
mingdao@james:~/build$ which glxgears
/usr/X11R6/bin/glxgears
mingdao@james:~/build$

Turin Turambar · 03-31-2005, 07:00 PM

I can start glxgears in the root terminal, but it won't display. That's the problem.
And not just glxgears - any program that requires OpenGL won't start in root terminal.

Bruce Hill · 03-31-2005, 07:07 PM

nevermind ...

evil_empire · 04-01-2005, 10:34 AM

WHat do you mean by root terminal?
You have to run glxgears in a console/shell while X is running. It doesn't work in command line mode.

Turin Turambar · 04-01-2005, 01:11 PM

Well, it's the Terminal Super User mode. I can run OpenGL programs in every terminal, except in that one. However, I remember that I *could* start it from there to.

I guess I messed up some settings....

evil_empire · 04-01-2005, 01:45 PM

Quote:

It says glxgears: Error: couldn't open display '(null)'

Well, aboves suggests, X is not running for that session. So you can't run glxgears. You have to have X running.

Turin Turambar · 04-01-2005, 07:42 PM

Errr... isn't the X started the moment I enter the GUI environment?!
Please, how to install it in the root term.?

evil_empire · 04-02-2005, 06:45 AM

Well,
You login to the GUI, you open a konsole thru the menu, eg "konsole", glxgears will work, you open a terminal eg "xterm", it will work.
What doesn't work is,
You login to the GUI, you see a nice desktop. You press CTRL+ALT+F1/F2/F3/F4/F5/F6 and swith to a virtual console and login and run glxgears, it will not work!!!

If you open a shell, a konsole, a terminal, a super terminal or whatever, as long as you open it from the GUI, glxgears will run.
But you cannot run it in a seperate virtual console.

So what exactly did u do?

E@zyVG · 04-02-2005, 01:30 PM

Ok, here is the deal. OpenGL got , more or less, nothing to do with X.

Try running and configuring sax2 again. If this doesn't work, then reinstall drivers (maybe you updated your kernel lately, hence setuo or compile of video drivers are required again), and then run sax2, according to your drivers readme.

evil_empire · 04-02-2005, 03:13 PM

Quote:

Ok, here is the deal. OpenGL got , more or less, nothing to do with X.

Anyway, it is about glxgears not running. See the x there?

Turin Turambar · 04-02-2005, 03:50 PM

Ok, here's what happens.

I enter the GUI and normally run the system (like Windows XP). If I want to start OpenGL programs from the root console (Super User Mode), they will not work.

For example, glxgears will show "error, could not open...", supertux will show "Warning: I could not set up fullscreen video for 640x480 mode. The Simple DirectMedia error that occured was: Fatal signal: Segmentation Fault (SDL Parachute Deployed), and the list goes on.

But if I start the same stuff from normal konsole (not root), everything works. That's strange. I didn't change anything in kernel recently and tried SaX several times, but it didn't work.

E@zyVG · 04-03-2005, 02:01 PM

Why are you running graphic apps in root mode???

Well, now I got what u mean. I am also unable to access OpenGL through ATI drivers, but only through Mesa. Ok try this:

Quote:

now run fglrxconfig (remember you are configureing this in root... mine did not apply to the regular user, so i had to run fglxconfig again. what i did was log in as the user.. pull up a shell, ran su, then ran init 3. logged in again as the usr at the CLI, su, and ran fglrxconfig.) i really hope that made sense... lol.

Hope you got the idea, but use sax

Personally, I didn't try it and don't need to.