Website tips - nvidia

[Kent]

Hello,
Since it isn't yet on the powertop/lesswatts websites, I thought I would  
mention that the 100.14.19 nVidia driver has experimental support for  
ondemand vblank interrupts.  It appears to work as advertised, but I  
haven't been able to test for changes in power consumption yet.

The X .conf subsection for the video driver needs this line:
     Option      "OnDemandVBlankInterrupts" "true"

nvidia-readme snippet:
     Normally, VBlank interrupts are generated on every vertical refresh of
     every display device connected to the GPU(s) installed in a given  
system.
     This experimental option enables on-demand VBlank control, allowing the
     driver to enable VBlank interrupt generation only when it is required.
     This can help conserve power.

     Default: off (on-demand VBlank control is disabled).

Regards,
--Kent