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/
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/-- Home http://evanfoss.googlepages.com/ Work http://forge.abcd.harvard.edu/gf/project/epl_engineering/wiki/
Thanks again. This works and the heat has dropped substantially. It is still not as cool as I would like but this will do for now. I still need to file a bug report with the intel / apple gmux people. -Evan On Sat, Feb 14, 2015 at 10:42 PM, Evan Foss <evanfoss at gmail.com> wrote:> 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/ > > > > -- > Home > http://evanfoss.googlepages.com/ > Work > http://forge.abcd.harvard.edu/gf/project/epl_engineering/wiki/-- Home http://evanfoss.googlepages.com/ Work http://forge.abcd.harvard.edu/gf/project/epl_engineering/wiki/