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: > > 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 ;-) > > > 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" > > > > And > > > > #GRUB_CMDLINE_LINUX_DEFAULT="ipv6.disable=1 consoleblank=450 > > intel_pstate=passive > cpufreq.default_governor=schedutil cpuidle_sysfs_switch cpuidle.governor=teo" > > > > 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. > > > 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. > > 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