Hi Quentin,
Thanks for your quick reply.

On 2020.06.23 11:05 Quentin Perret wrote: 

Hi Doug,

On Tuesday 23 Jun 2020 at 10:54:33 (-0700), Doug Smythies wrote:

quoted

Hi Quentin,

Because I am lazy and sometimes do not want to recompile
the distro source, I have a need/desire for this.

Good to know I'm not the only one ;-)

quoted

Tested these two grub command lines:

GRUB_CMDLINE_LINUX_DEFAULT="ipv6.disable=1 consoleblank=300 intel_pstate=disable

cpufreq.default_governor=schedutil cpuidle_sysfs_switch cpuidle.governor=teo"

quoted

And

#GRUB_CMDLINE_LINUX_DEFAULT="ipv6.disable=1 consoleblank=450 intel_pstate=passive

cpufreq.default_governor=schedutil cpuidle_sysfs_switch cpuidle.governor=teo"

quoted

And all worked as expected. I use Ubuntu as my distro, and also had to disable a startup script that

switches to "ondemand", or similar, after 1 minute.

Good, thanks for giving it a try.

quoted

As a side note (separate subject, but is one reason I tried it):
My i5-9600K based computer seems to hit a power limit during boot approximately 3 seconds after

kernel selection on grub.

quoted

This had no effect on that issue (even when selecting powersave governor).

Interesting ... Could you confirm that compiling with powersave as
default doesn't fix the issue either?

No, it doesn't (good idea for a test though).
However, the big mains spike is also gone. So, I no longer know why those power
limit log bits are always set after boot.

Other question, when does the intel_pstate driver start on your device?
Before or after that 3 seconds boot time?

Before, if I understand correctly (from dmesg):

[    0.468969] intel_pstate: Intel P-state driver initializing

I'll attach a couple of annotated mains power graphs.
(which will likely get stripped from the on-list version of this e-mail).

Currently, I am drowning in stuff that doesn't work, and will put
this aside for now. I'll revive this as a new thread or a bugzilla
eventually.

I also tried booting with turbo disabled, no difference.

Thanks for this patch set.

... Doug