thank you for spending your time and improving the kernel.
As my processor doesn't use PC6/PC7 I tried your patch and hoped there would be any improvement. But there was none - it still keeps using sleep states <=PC3 even if I disable the monitor, activate ASPM for all devices, apply all power saving improvements listed by powertop and apply your patches to linux 4.2. The processor is about 98% in C7 and 96% in RC6, uses PC2 for about 25% and PC3 for 50% - nevertheless something prevents it from using PC6/PC7. I enabled several kernel parameters for power saving: "pcie_aspm=force i915.enable_psr=1 i915.enable_fbc=1 drm.vblankoffdelay=1 i915.semaphores=1" Is there anything else, that I could try? Is there any chance this patches make it to the kernel - by know it seems like there was some data corruption and it's stalled (correct me if I'm wrong). By know I haven't noticed any errors in dmesg - but there was no improvement either. It would be great if someone could give me a hint what could be done thus PC6/PC7 are used.
Power management, mobile and firmware developer on Linux. Security developer at Aurora. Ex-biologist. mjg59 on Twitter. Content here should not be interpreted as the opinion of my employer. Also on Mastodon.
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Current status
Date: 2015-07-21 04:37 pm (UTC)thank you for spending your time and improving the kernel.
As my processor doesn't use PC6/PC7 I tried your patch and hoped there would be any improvement. But there was none - it still keeps using sleep states <=PC3 even if I disable the monitor, activate ASPM for all devices, apply all power saving improvements listed by powertop and apply your patches to linux 4.2. The processor is about 98% in C7 and 96% in RC6, uses PC2 for about 25% and PC3 for 50% - nevertheless something prevents it from using PC6/PC7. I enabled several kernel parameters for power saving: "pcie_aspm=force i915.enable_psr=1 i915.enable_fbc=1 drm.vblankoffdelay=1 i915.semaphores=1"
Is there anything else, that I could try?
Is there any chance this patches make it to the kernel - by know it seems like there was some data corruption and it's stalled (correct me if I'm wrong).
By know I haven't noticed any errors in dmesg - but there was no improvement either.
It would be great if someone could give me a hint what could be done thus PC6/PC7 are used.
Thanks in advance