[ltp] suspend works with i915 module, but without, it fails!

[Volker Krueger]

Hi Ferdinand,

that sounds actually like you have found a good setting.

I just tried the same (normal wiring on battery with thunderbird and
firefox) and I have a long-term consumption (according to poiwertop) of
9.8W, the short term is presently at around 8.9 W.

Did you do anything special to get the consumption down or was it like
that out of the box?

best,
Volker


axp wrote:
> Volker Krueger wrote:
>   
>> Hi,
>>
>> when I use powertop, I can see that i915 generates a lot of interrupts.
>> Apparently, this is a bug that is corrected in 2.6.28. Perhaps in your
>> ubuntu kernel this is already fixed.
>>
>> I am using opensuse and here, the bug with the i915 sending a lot of
>> interrupts is not yet fixed.
>>
>> If you say that there is no difference in power consumtion for you when
>> working with or without the i915/dri, then I suppose it is sufficient to
>> simply wait for the corrected kernel.
>>
>> Presently, at least, it still is a difference of about 1-1.5 W.
>>
>> best,
>> Volker
>>
>>
>>
>> axp wrote:
>>   
>>     
>>> Volker Krueger wrote:
>>>   
>>>     
>>>       
>>>> dear all,
>>>>
>>>> two small corrections: of course it is kernel 2.6(!).27.7
>>>>
>>>> and in case of the wakeup after the standby: the screen does not stay
>>>> blank as described below. My memory was wrong: the wakeup end where the
>>>> screen is black with the mouse pointer visible, i.e., the x-server
>>>> starts but then something freezes. I have not tried a remote login. In
>>>> case a remote login would work: which log file would be the one to look at?
>>>>
>>>> does anyone have an idea how to debug that in general?
>>>>
>>>> best,
>>>> Volker
>>>>
>>>>
>>>> Volker Krueger wrote:
>>>>   
>>>>     
>>>>       
>>>>         
>>>>> Hi,
>>>>>
>>>>> has someone observed this, too?
>>>>>
>>>>> my laptop happily suspends when the i915/dri  modules are loaded.
>>>>> However, it fails when I start the x-server without the i915/dri !!
>>>>>
>>>>> To be precise: I use suse11.1, with the std-kernel (kernel 2.7.27.7).
>>>>> The laptop: X200s
>>>>> Graphicscard:Intel Graphics Media Accelerator 4500MHD
>>>>>
>>>>> I compare the two x-server  settings, where one has the additional line 
>>>>>
>>>>> 'Option       "NoDRI"'
>>>>>
>>>>> in the Device-section.
>>>>>
>>>>> Without the NoDRI option, the suspend works perfecty. With this option,
>>>>> however, the laptop shuts down, but hangs somewhere after the wake-up,
>>>>> while the screen is still dark.
>>>>>
>>>>> The whole point for using NoDRI is that the X200s saves about 20%(!!)
>>>>> energy when on battery.
>>>>>
>>>>> any ideas?
>>>>>
>>>>> best,
>>>>> Volker
>>>>>
>>>>>   
>>>>>     
>>>>>       
>>>>>         
>>>>>           
>>> Hi,
>>>
>>> i can confirm this bug, although having a x301, but we have the same GPU.
>>>
>>> what i cant confirm is that you can save 20%(!!) of power drain with
>>> setting the NoDRI option.
>>>
>>> mine is using 8.7W while writing this email and have a lot of
>>> applications open which are known to wake the system a lot:
>>>
>>> pidgin
>>> opera (20+ tabs open, currently doing some research)
>>> thunderbird
>>> and some terminals
>>> 2.6.27-11-generic  x86_64
>>>
>>> using ubuntu 8.10
>>> with some additional sources:
>>> deb http://ppa.launchpad.net/intel-gfx-testing/ubuntu intrepid main
>>> deb http://ppa.launchpad.net/surban/ubuntu intrepid main
>>>
>>> and intrepid-proposed
>>>
>>>
>>>
>>> i would recommend using the intel-gfx-testing maybe it helps
>>>
>>>
>>>
>>> HTH,
>>> Ferdinand
>>>
>>>
>>>
>>>   
>>>     
>>>       
> Iam working here on my x301, and have a power consumption of an average
> of: 8.4Watts
>
> with a usable configuration: wlan on, display brightness high, ondemand
> governor  and a lot of applications
>
>
> so far,
> Ferdinand
>