[ltp] xorg dri enabled - processor C3 state not entered

[Aidan Marks]

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Digging up an old thread.  DRI doesn't allow C3/4 processor state.  I
still see this on 2.6.16 on my T42 with radeon mobility 7500.  Disabling
DRI allows C3/C4.

Is this a fundamental issue that DRI causes bus master activity and it's
not really a bug per se?

On 15/04/05 03:21 AEST, Brad Langhorst wrote:

> On Thu, 2005-04-14 at 17:36 +0200, Peter Frühberger wrote:
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>> Hi all,
>>
>> I am running kernel 2.6.11.7 with latest acpi patch (20050309) and the
>> suspend2 version 2.1.8.2 patches and the radeonfb "Anti suspend2ram
>> Powerdrain" patches.
>>
>> I have got the following problem:
>> If I start xorg (version Ubuntu 6.8.2-10 20050405154308) with enabled
>> dri, the processor never enters C3 processor power state, there is
>> always bus activity, if I am on VT7 (X is running).
>>
>> But If I switch to a text konsole, while X is still running, C3 state
>> can be entered.
> 
> i posted a very similar message a little while ago...
> i don't know of any way to get C3 and DRI
> 
> brad
> 
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