9600 GT with nvidia driver occasionally blanking
Replaced my old 8500 card with a (used) 9600 GT. Connected the 6 pin power cable to 2 different rails of the power supply as it should be.
The card works OK in VESA mode, but when using the nvidia driver (latest 295.49 and earlier 295.33), the screen is blanked randomly for about 1 sec. The time between blanking varies, e.g. 5 sec to 30 sec. The frequency seems random, i.e. it doesn't become more frequent if the GPU is busy.
The machine is basically idle, GPU temp at 48 C.
Tried adding the pci=nommconf kernel boot option as described in the stability sticky thread but no change.
Tried upgrading the xserver-xorg pkg. but that didn't help either.
Could be an ACPI or DPMS interaction bug ?