Running gzserver on remote machine using ssh

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Hi!

I'm trying to run gzserver on a remote machine.

If I simply do

ssh machine
gzserver --verbose

This is the result:

[Err] [RenderEngine.cc:734] Can't open display: 
[Wrn] [RenderEngine.cc:97] Unable to create X window. Rendering will be disabled
[Wrn] [RenderEngine.cc:301] Cannot initialize render engine since render path type is NONE. Ignore this warning ifrendering has been turned off on purpose.

So I've tried using (ssh-ing from a vmware)

ssh -X machine
gzserver --verbose

The output is, crashing

X Error of failed request:  BadValue (integer parameter out of range for operation)
  Major opcode of failed request:  155 (GLX)
  Minor opcode of failed request:  3 (X_GLXCreateContext)
  Value in failed request:  0x0
  Serial number of failed request:  18
  Current serial number in output stream:  19

I also tried to install Xvfb and run

Xvfb :5 -screen 0 1024x768x24 &
export DISPLAY=:5.0
gzserver --verbose

no help, same error

X Error of failed request:  BadValue (integer parameter out of range for operation)
  Major opcode of failed request:  151 (GLX)
  Minor opcode of failed request:  3 (X_GLXCreateContext)
  Value in failed request:  0x0
  Serial number of failed request:  18
  Current serial number in output stream:  19

Any clues on why this might be happening?