Hi See comments inline. 2013/12/22 Nicolas Kalkhof <nkalkhof@xxxxxx>: > Sorry, last post got html infected! > > Hello, > I've been trying to enable PC8 on my Haswell i7-4600M Notebook but i'm not sure if it is working properly. As far as I could check, your PCI ID is 0416, so your machine is not ULT. As far as I know, your machine supports only up to PC7 state. I may be wrong. Still, I will provide some comments below: > During idle states (No X running) 915_pc8_status tells me that PC8 seems to be disabled: To get into Pacakge C8 and deeper states you need all screens to be disabled. You mentioned X is not running, so what exactly did you do to disable all the screens? > Requirements met: no This means: either one or more screens are enabled, or the power well is enabled, or both. > GPU idle: no Something is submitting work to the GPU. > Disable count: 3 > IRQs disabled: no > Enabled: no > Is this supposed to be right? > > Powertop 2.5 reports that Package C-States never go above pc3 while Core C7-HSW and GPU RC6 states are always reached with > 90%. Did you go to the "tunables" tab and switch everything to "good"? All devices (not only graphics) need to be properly configured for the machine to reach PC8+. > Package | Core | CPU 0 > | | C0 active 0.7% > | | POLL 0.0% 0.0 ms > | | C1E-HSW 0.9% 1.3 ms > C2 (pc2) 90.8% | | > C3 (pc3) 0.0% | C3 (cc3) 0.4% | C3-HSW 0.4% 0.4 ms > C6 (pc6) 0.0% | C6 (cc6) 0.0% | C6-HSW 0.0% 0.0 ms > C7 (pc7) 0.0% | C7 (cc7) 97.1% | C7s-HSW 97.5% 5.8 ms > | Core | CPU 1 > | | C0 active 0.8% > | | POLL 0.0% 0.0 ms > | | C1E-HSW 0.0% 0.0 ms > | | > | C3 (cc3) 0.1% | C3-HSW 0.1% 0.3 ms > | C6 (cc6) 0.0% | C6-HSW 0.0% 0.0 ms > | C7 (cc7) 92.0% | C7s-HSW 92.3% 12.0 ms > | GPU | > | | > | Powered On 0.6% | > | RC6 99.4% | > | RC6p 0.0% | > Powertop doesn't show PC8, PC9 and PC10 states, which confirms my belief that your machine does not support these states. > Kernel is 3.13-rc4 from ~danvet/drm-intel/drm-intel-nightly > Params are: i915.i915_enable_rc6=1 pcie_aspm=force i915.i915_disable_power_well=0 i915.enable_pc8=1 "acpi_osi=!Windows 2012" acpi_backlight=legacy Why are you using all these options for i915? We recommend to stick to the defaults since they are the best bug-free setup. Thanks, Paulo > > dmesg goes here: http://pastebin.ca/2516591 > Any ideas? > > _______________________________________________ > Intel-gfx mailing list > Intel-gfx@xxxxxxxxxxxxxxxxxxxxx > http://lists.freedesktop.org/mailman/listinfo/intel-gfx -- Paulo Zanoni _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
