Solved OpenGL error by an old game: "No matching fbConfigs or visuals found"

I tried to run an old game called Enemy Territory using this description: https://forums.freebsd.org/threads/howto-install-and-setup-wolfenstein-enemy-territory.3754/ but it looks like having issues with OpenGL. Any idea how to solve this?

Code:
ET 2.60b linux-i386 May  8 2006
...
Bypassing CD checks
----- Client Initialization -----
----- Initializing Renderer ----
-------------------------------
----- Client Initialization Complete -----
----- R_Init -----
...loading libGL.so.1: Initializing OpenGL display
...setting mode -1: 1920 1080
Using XFree86-VidModeExtension Version 2.2
XF86DGA Mouse (Version 2.0) initialized
XFree86-VidModeExtension Activated at 1920x1080
libGL error: No matching fbConfigs or visuals found
libGL error: failed to load driver: swrast
Using 8/8/8 Color bits, 24 depth, 0 stencil display.
X Error of failed request: BadValue (integer parameter out of range for operation)
  Major opcode of failed request: 151
  Minor opcode of failed request: 3
  Serial number of failed request: 59
X Error of failed request: GLXBadContext
  Major opcode of failed request: 151
  Minor opcode of failed request: 5
  Serial number of failed request: 61
X Error of failed request: GLXBadContext
  Major opcode of failed request: 151
  Minor opcode of failed request: 26
  Serial number of failed request: 61
ERROR: couldn't create font (glGenLists)
GL_RENDERER: (null)
----- CL_Shutdown -----
RE_Shutdown( 1 )
X Error of failed request: GLXBadContext
  Major opcode of failed request: 151
  Minor opcode of failed request: 4
  Serial number of failed request: 65
-----------------------
----- CL_Shutdown -----
-----------------------
Sys_Error: Q_strncpyz: NULL src
 
Looks like KDE does not need the c7. I wonder what needs it or why is it installed.

I tried
Code:
pkg required-depends linux-c7-xorg-libs
and the result is funny, it lists Enemy Territory, so it came with the game. I am not sure now if this is the real cause of the error, but I can try to remove all c7 libs and install the c6 ones. Maybe that solves it.

Looks like I cannot delete it with pkg delete, because Enemy Territory depends on it and it would be removed too.
 
Well, you did refer to Nvidia-specific thread in https://forums.freebsd.org/threads/...stein-enemy-territory.3754/page-2#post-460510 not to mention your KDE+Nvidia thread. The error message also doesn't make sense for Intel/AMD GPU case.

Care to explain yourself?
Well you are completely right. I have multiple computers and the one I use for the forum has Radeon. The one that produces the error message has Nvidia in it, but had Radeon previously too. Sorry. I'll try what you suggested.
 
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