[Nouveau] Bug or not?

[Evan Foss]

On the older kernel

[    6.494956] nouveau  [     CLK][0000:01:00.0] 07: core 270-405 MHz
memory 838 MHz
[    6.494989] nouveau  [     CLK][0000:01:00.0] 0a: core 270-774 MHz
memory 1560 MHz
[    6.495015] nouveau  [     CLK][0000:01:00.0] 0e: core 270-774 MHz
memory 4000 MHz
[    6.495182] nouveau  [     CLK][0000:01:00.0] --: core 405 MHz memory 680 MHz

On Sat, Feb 14, 2015 at 10:35 PM, Evan Foss <evanfoss at gmail.com> wrote:
> Because I am on a macbook the VBIOS might be wonky.
>
> I tried turning off nVidia and using intel. The result was a blank
> screen. I know other people had the same bug which was something to do
> with reprobing lvds?! I saw patches go by and every time I tried one
> the results were the same. fail. I was actually about to post a bug
> report to the intel (i915) people about it.
>
> I tried to work out how to get optimus to work. After trying several
> different sets of instructions I never found a working configuration
> and put it aside. I never used to use opengl but lately my pcb
> software has adopted it so my needs changed.
>
> I will get back to you with more results on this matter after I get
> the newer kernel up.
>
>
> On Sat, Feb 14, 2015 at 10:09 PM, Ilia Mirkin <imirkin at alum.mit.edu> wrote:
>> On Sat, Feb 14, 2015 at 9:56 PM, Evan Foss <evanfoss at gmail.com> wrote:
>>> I have a side question which may be the subject of a future second bug
>>> report. I have been lurking on the nouveau mailing list for some time.
>>> I understand from various posts that the nvidia gpu clock speed right
>>> now is set to the lowest possible setting. Why does my machine run so
>>
>> Often but not always the case -- the clock speed is whatever the VBIOS
>> leaves it in. For kepler, that is usually the lowest setting.
>>
>>> much hotter in linux than macos? I turned off the intel graphics and
>>> the cpu clock is set to the lowest available speed.
>>
>> You should instead turn off the nvidia graphics and run off intel --
>> intel is much less power-hungry than nvidia, even at the lowest
>> clocks. If it's an optimus setup, the nvidia gpu should automatically
>> power off until needed (either because some display is connected to
>> it, or for offloading).
>>
>>>
>>> How do I get a display of the GPU clocking speeds?
>>
>> You should see it in dmesg... look for CLK lines. The ones with -- (or
>> AC/DC) will show the current setting. Or boot with nouveau.pstate=1
>> and you should have a /sys/class/drm/card*/device/pstate file.
>>
>>   -ilia
>
>
>
> --
> Home
> http://evanfoss.googlepages.com/
> Work
> http://forge.abcd.harvard.edu/gf/project/epl_engineering/wiki/



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