I never had a problem with 11.04. but with 11.10 i get the occasional
freeze from nvidia. going to 'additional drivers' and removing the
nvidia driver completely solves the freeze.

I have yet to test it but the issue seems to be related to the power
saving mode. if you add

      Option  "RegistryDwords"    "PowerMizerEnable=0x1;
PerfLevelSrc=0x2222; PowerMizerDefault=0x2; PowerMizerDefaultAC=0x2"

to the xorg.conf, the system is stable, it will just never run at low or
high power, just stick somewhere in the middle.

lspci says i have a 01:00.0 VGA compatible controller: nVidia
Corporation GF106 [Quadro 2000M] (rev a1)

i hope nvidia and the 3.0 kernel guys figure out what's going on soon as
currently i'm loosing production hours and i'm definitely not used to
that from linux.

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https://bugs.launchpad.net/bugs/728745

Title:
  [nvidia, 7300, 7400] display freeze when using unity desktop

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