GLX problem

[jmcgee]

I can no longer start mythfrontend or mythtv-setup.

mythfrontend says this whens starting up:
2010-05-30 11:56:42.448 Using the OpenGL painter
2010-05-30 11:56:42.472 Failed to create OpenGL painter. Check your OpenGL installation.
QGLContext::makeCurrent(): Cannot make invalid context current.
2010-05-30 11:56:42.472 OpenGL: Deleting OpenGL Resources
QGLContext::makeCurrent(): Cannot make invalid context current.


mythuser@PVR1:~$ glxinfo
name of display: :0.0
Error: couldn't find RGB GLX visual or fbconfig

nvidia-settings says
Cannot query GLX Vendor.

I see some errors in xorg log that kernel driver did not load?

From synaptic I have completely removed all nvidia and reinstalled. I have deleted xorg.conf and rebooted trying to let Ubuntu 10.04 detect everything, same results.

I am using Nvidia drivers from avenard repository.

[adamk75]

If you're using Ubuntu, you should be using the drivers from the driver manger, not some third party repo. I suggest trying the approved, tested, drivers first.

Adam

[Dizzle7677]

The nVidia module looks to load fine from /var/log/Xorg.0.log.

(**) May 30 11:13:31 NVIDIA(0): Enabling RENDER acceleration
(II) May 30 11:13:31 NVIDIA(0): Support for GLX with the Damage and Composite X extensions is
(II) May 30 11:13:31 NVIDIA(0):     enabled.
(II) May 30 11:13:33 NVIDIA(0): NVIDIA GPU GeForce 8400 GS (G98) at PCI:3:0:0 (GPU-0)
(--) May 30 11:13:33 NVIDIA(0): Memory: 524288 kBytes
(--) May 30 11:13:33 NVIDIA(0): VideoBIOS: 62.98.12.00.00
(II) May 30 11:13:33 NVIDIA(0): Detected PCI Express Link width: 1X
(--) May 30 11:13:33 NVIDIA(0): Interlaced video modes are supported on this GPU
(--) May 30 11:13:33 NVIDIA(0): Connected display device(s) on GeForce 8400 GS at PCI:3:0:0:
(--) May 30 11:13:33 NVIDIA(0):     Philips 32 LCD TV (DFP-0)

Problem looks to be here with myth in dmesg hence the segfault for whatever reason. Check around the myth site?

[   57.922725] mythfrontend.re[1674]: segfault at 35c ip 09ba4f96 sp bff1c38c error 4 in libGL.so.1.2[9ba3000+5000]

Why do you have

Section "Device"
    Identifier     "Videocard0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce 6200"
EndSection

when it's a GeForce 8400 GS.

[AaronP]

Your Linux distribution is picking up the wrong version of libGL from a nonstandard location:

ldd /usr/bin/glxinfo

	linux-gate.so.1 =>  (0x00309000)
	libGL.so.1 => /usr/lib/mesa/libGL.so.1 (0x00bd8000)
	libm.so.6 => /lib/tls/i686/cmov/libm.so.6 (0x00383000)
	libX11.so.6 => /usr/lib/libX11.so.6 (0x0095b000)
	libpthread.so.0 => /lib/tls/i686/cmov/libpthread.so.0 (0x004e5000)
	libc.so.6 => /lib/tls/i686/cmov/libc.so.6 (0x0054c000)
	libXext.so.6 => /usr/lib/libXext.so.6 (0x00110000)
	libXxf86vm.so.1 => /usr/lib/libXxf86vm.so.1 (0x00b1e000)
	libXdamage.so.1 => /usr/lib/libXdamage.so.1 (0x00813000)
	libXfixes.so.3 => /usr/lib/libXfixes.so.3 (0x00120000)
	libdrm.so.2 => /lib/libdrm.so.2 (0x006ba000)
	libdl.so.2 => /lib/tls/i686/cmov/libdl.so.2 (0x00414000)
	/lib/ld-linux.so.2 (0x00e61000)
	libxcb.so.1 => /usr/lib/libxcb.so.1 (0x00ea9000)
	librt.so.1 => /lib/tls/i686/cmov/librt.so.1 (0x008fb000)
	libXau.so.6 => /usr/lib/libXau.so.6 (0x00126000)
	libXdmcp.so.6 => /usr/lib/libXdmcp.so.6 (0x002df000)

You'll need to consult your distribution's documentation on how to fix the library search path.

[Arup]

J. Avenard repo is the approved tried and tested ppa for those using Mythbuntu and there is nothing wrong at all with his files there.