Comment 164 for bug 1803179
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#164 |
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bbfa235
(Get the code!)
(In reply to Kai-Heng Feng from comment #145)
Thank you very much for this optimistic-sounding info, Kai-Heng Feng.
> Laptops with Skylake SoC and later shouldn't need bbswitch. PCIe port PM
> will disable the power of the card.
How do I check if I have Skylake SoC?
I am actually currently using a modified bbswitch where I have disabled the acpi calls. The point of this is to force bumblebee to automatically load and unload the nvidia modules before and after using optirun. I suspect there is an easier way but for now this works for me.
> After nvidia.ko gets unloaded, make sure "power/control" is "auto" for its
> video (e.g. 01:00.0) and audio (e.g. 01:00.1) functions and its upstream
> bridge (use lspci -t to check).
I initially tried what you describe here but the audio part was preventing power management from happening because it was permanently flagged in use by the snd_hda_audio module. Hence my work-around.
> In addition to that, these two commits are also required for mainline kernel
> users:
> https:/
> ?id=52525b7a3cf
> https:/
> ?id=bacd861452d
I am not interested in attempting to compile the kernel so will wait for these two commits to make it into the stable release. Reading their descriptions, especially the second one, sounds like it is the perfect fix for what I am experiencing.