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

[Volker Krueger]

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 > /sys/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
>