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

[Volker Krueger]

axp wrote:
> Volker Krueger wrote:
>   
>> cool!! :-))
>> Thanks for the info!
>>
>> Some I had done myself, but some I will try, too!
>>
>>
>>
>> axp wrote:
>>   
>>     
>>> Volker Krueger wrote:
>>>   
>>>     
>>>       
>>>> 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
>>>>>   
>>>>>     
>>>>>       
>>>>>         
>>>>>           
>>> I did some twaeks,
>>>
>>> iwconfig wlan0 power on
>>> echo 1 > /sys/devices/system/cpu/sched_mc_power_savings
>>> echo min_power > /syhttp://www.thinkwiki.org/wiki/How_to_reduce_power_consumptions/class/scsi_host/host0/link_power_management_policy
>>>
>>>
>>> laptop_mode
>>>
>>> and snd_hda_intel powersave, and options usbcore autosuspend=5
>>>
>>>
>>> BTW: I had also a high interrupt frequency with the older kernel, but
>>> since the update from intrepid-proposed the interrupts are gone
>>>
>>>
>>> HTH,
>>> Ferdinand
>>>   
>>>     
>>>       
> A good ressource is,
> http://www.thinkwiki.org/wiki/How_to_reduce_power_consumption
>
> www.lesswatts.org
>
>
>
>   
The lesswatts.org I knew.

but there is also

http://ww.linuxpowertop.org/index.php, which is quite interesting.

the page under thinkwiki I hadn't found. very interesting, thanks!