This bug continues to occur to this day. I experience it OOTB with 185.18.36 on Ubuntu Karmic 64-bit on a Dell XPS M1710 with a 7900 GS. Bug is tracked at https://bugs.launchpad.net/ubuntu/+s...80/+bug/164589
I have used the various powermizer options to configure static battery/AC settings instead of adaptive clocking, which seems to be what causes this bug. If NVIDIA isn't going to fix adaptive clocking on these cards then can you guys at least disable it by default for this chipset series and use static battery/AC settings? Such a trivially fixable bug should not be happening OOTB.