fbconfig error with OnscreenImage

Scripting Issues
1

I’m using Ubuntu (Naughty Narwhal), and for some reason I can’t seem to make use of OnscreenImage. When ever I do I get the following:

No suitable FBConfig contexts available; using XVisual only

.

I realise some have had this problem in the past but I seem to recall this was more of a global issue, whereas in my case OnscreenImage is the only thing that produces the error.

Anyone know what might be causing it?

2

That message would be produced by the code that opens a window or an offscreen buffer; it has nothing to do with the OnscreenImage code. I think you must be slightly misled by your program structure: you would see that error message whether or not you are using OnscreenImage.

It’s not necessarily a fatal error. It means that your graphics driver does not provide the more modern FBConfig interface to open a window, so instead Panda has to fall back to the older XVisual interface. There have been some reports of the XVisual interface support being buggy, though. Does it successfully open a window?

David

3

It loads windows fine, and running through the samples hasn’t reproduced the error. I finally tried stripping my code down to the manuals example code for OnscreenImage. While it seems nonsensical to me, that’s the only thing that makes the driver and/or Panda yell at me. I tried

gl-support-fbo 0
glx-support-fbconfig 0

in my config and it let me run the script but it was just a blank window. I should mention in windows 7 the sript runs fine
which I think would indicate a driver but I’m not real certain what’s going wrong.

4

What is the script in question? Are you sure your texture is a power-of-two size?

David

5

Well I tried it like this and it worked:

from direct.directbase.DirectStart import *
from direct.gui.OnscreenImage import OnscreenImage
from pandac.PandaModules import *
from direct.showbase import DirectObject

base.disableMouse()
props = WindowProperties()
props.setCursorHidden(True) 
base.win.requestProperties(props)

a = '1.jpg'


imageObject = OnscreenImage(image = a, pos = (0, 0, 0))

run()

But if I attempt to add any functionaly to the script it returns the error even with a properly based image

from direct.directbase.DirectStart import *
from direct.gui.OnscreenImage import OnscreenImage
from pandac.PandaModules import *
import sys
import random
from direct.showbase import DirectObject

base.disableMouse()
props = WindowProperties()
props.setCursorHidden(True) 
base.win.requestProperties(props)




global y
y=1

def next1():
    c=y
    b=str(c)
    a=b + ".jpg"
    imageObject = OnscreenImage(image = a, pos = (0, 0, 0))
    
class DoIt(DirectObject.DirectObject):
    def __init__(self):
            self.accept('arrow_up', self.up)
            self.accept('arrow_down', self.down)
    def up(self):
       #global y
       if y > 4:
        next1()
       else:
        global y
        y +=1
       next1()
    def down(self):
       #global y
       if y < 2:
        next1()
       else:
        global y
        y -=1
       next1()
    
    
   
h = DoIt()
run()
6

Do you have an example of a different script that runs successfully?

David

7

I was trying to multi-task when I typed the preceding script so it was a little nonsensical (although looking at it now it still has a pointless global, oops). Out of frustration I reinstalled a number of my nvidia packages in synaptic and purged some graphics related stuff I wasn’t using. In doing so, the problem has since went away.

I’d like to know what I did to cause the issue in the first place so I don’t do it again but right I’m satisfied just being able to run my application in both Linux and Windows :stuck_out_tongue:

Thanks for your time David