Same problem here under Kubuntu 11.04. I also get the message that the current nVidia driver is active but not in use.
In addition, the KDE System Settings does not show the nVidia driver settings (at 60 Hz) but instead shows a Default at 50 Hz. This did not happen in Kubuntu 10.10, where it was clear from the KDE System Settings/ Display and Monitor which was being used. Note that I am still using Xorg for KDE.
Same problem here under Kubuntu 11.04. I also get the message that the current nVidia driver is active but not in use.
In addition, the KDE System Settings does not show the nVidia driver settings (at 60 Hz) but instead shows a Default at 50 Hz. This did not happen in Kubuntu 10.10, where it was clear from the KDE System Settings/ Display and Monitor which was being used. Note that I am still using Xorg for KDE.
$ lspci | grep nVidia
02:00.0 VGA compatible controller: nVidia Corporation GF106 [GeForce 450 GTS] (rev a1)
02:00.1 Audio device: nVidia Corporation GF106 High Definition Audio Controller (rev a1)
$ uname -a
Linux davidrnewman 2.6.38-8-generic #42-Ubuntu SMP Mon Apr 11 03:31:24 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux
$ glxinfo | grep render NV_blend_ square, GL_NV_complex_ primitives, GL_NV_condition al_render, NVX_conditional _render, GL_NVX_ gpu_memory_ info, GL_OES_depth24, OES_fbo_ render_ mipmap, GL_OES_ get_program_ binary, GL_OES_mapbuffer,
direct rendering: Yes
OpenGL renderer string: GeForce GTS 450/PCI/SSE2
GL_
GL_
GL_
The display is definitely responding more slowly than under Kubuntu 10.10. E.g. a 3 min. delay in starting mythfrontend on KDE.