It looks like i can no longer edit my OP above.
Working yesterday, battery went from 68% - 28% over 3:59 on balance_power perf pref with pstate active, ppd set to power-saver, and hdmi autosuspend via udev. Hourly calcs matched total use at avg 5.52W.
Assuming linearity for the whole battery, this use case would allow 9:58 for a full batt. Or 90% use would give 8:58. My preference is to use 90-20%, so about 6:58.
With the Notebookcheck review as a baseline at 12:06 with 9.8% larger battery means parity with win11 will require finding about 0:57 longer runtime. Note: to verify need to confirm linux display settings for 150 nit brightness.
Another observation, the energy performance preference does not seem to be driven by PPD. That should either be tied in or added as a udev rule based on user preference. This is one place where TLP settings for this survives a reboot and switches based on ac or batt settings.
Now to switch back to TLP and test 4-6.
Config & methodology as outlined above.
- TLP, pstate status set to active, energy perf pref at power. Had to uncomment
USB_AUTOSUSPEND=1in/etc/tlp.conffor it to allow the HDMI expansion card to go into powersaving. 10% use took 66 mins, so 5.0W avg.
Based on the fact the hdmi card didn’t enable autosuspend until it was implicit in the conf file, these are active lines for the above testing:
$ grep "^[^#;]" /etc/tlp.conf
TLP_ENABLE=1
CPU_SCALING_GOVERNOR_ON_AC=schedutil
CPU_SCALING_GOVERNOR_ON_BAT=powersave
CPU_SCALING_MIN_FREQ_ON_AC=400000
CPU_SCALING_MAX_FREQ_ON_AC=5121000
CPU_SCALING_MIN_FREQ_ON_BAT=400000
CPU_SCALING_MAX_FREQ_ON_BAT=2200000
CPU_ENERGY_PERF_POLICY_ON_AC=balance_performance
CPU_ENERGY_PERF_POLICY_ON_BAT=power
RADEON_DPM_PERF_LEVEL_ON_AC=auto
RADEON_DPM_PERF_LEVEL_ON_BAT=auto
RADEON_POWER_PROFILE_ON_AC=auto
RADEON_POWER_PROFILE_ON_BAT=auto
USB_AUTOSUSPEND=1
This config does seem to allow normal suspend & resume.
Ran a longer suspend (over 4 hrs) and upon resume calculated rough max of
4d 13h (avg about 1/2W draw).