I've recently assembled a core i3 system and attempted to reduce the power consumed by using powertop. I noticed that during idle with no applications running (including Xorg) that the idle power state (C6) average residency was less than 5ms. The top offender was interrupts generated by the cx88 module. I mentioned this to Devin on IRC and he mentioned to comment out line 3533 of cx88-cards.c: //cx88_ir_init(core, pci); With this patch applied the interrupts disappeared and the idle state average residency jumped to more than 60ms. This obviously allows much better power efficiency as it avoids the power consumed by exiting idle states. I don't use the IR interface on my Pinnacle 800i cards and the driver doesn't have an option to disable IR. Just thought I'd bring this up on the list in case it interests anyone. Thanks. -- Taylor -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
