Update manager found new drivers this morning and after installation, 3D acceleration is back! Thank you Alberto.
lspci -nn | grep VGA 01:00.0 VGA compatible controller [0300]: nVidia Corporation NV18 [GeForce4 MX 4000] [10de:0185] (rev c1) -- [Intrepid] nvidia_drv.so: undefined symbol: AllocateScreenPrivateIndex https://bugs.launchpad.net/bugs/251107 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs