[ltp] Direct Rendering's affect on battery life?

[Daniel Skorka]

On Fri, Apr 07, 2006 at 09:30:01PM +0300, Marius Gedminas wrote:
> Hmm.  T42, open-source radeon driver, 2.6.15
> 
> $ cat /proc/acpi/processor/CPU/power
> active state:            C2
> max_cstate:              C8
> bus master activity:     2fffdfff
> states:
>     C1:                  type[C1] promotion[C2] demotion[--] latency[000] usage[00000010]
>    *C2:                  type[C2] promotion[C3] demotion[C1] latency[001] usage[08252215]
>     C3:                  type[C3] promotion[--] demotion[C2] latency[085] usage[00000000]
> 
> Does usage[00000000] mean my CPU never enters C3?

Yes. Note however that there can be multiple causes for this issue. USB
is a likely one. And then there's WLAN, audio, ...

Daniel