I ran the following command from an elevated Command Prompt:
powercfg /energy /output "c:\energy.html"
The energy report has an error from Realtek and a bunch of warnings. Are all of these OK to ignore? If not, how can I resolve them? Here's a screenshot of the report:
It depends.
It depends on your environment, on your computer use, etcetera.
The error (which I cannot cut and paste from your picture) basically says that your computer will not go into sleep. If you don't use the sleep mode, you can safely ignore the error. Normally, this should perhaps have been a warning too.
Warnings are not errors; in general they tell you that some functionality is missing or that you may expect some abnormal behavior (without the warning it would have been unexpected behavior).
Some warnings are for the system, some for the report generation. You seem to have a different timer setting and there were some issues generating the CPU utilization. You also seem to have an old WiFi router, one that doesn't support powersave.
Also try using the command exactly as HELP says:
POWERCFG /ENERGY /OUTPUT "longtrace.html" /DURATION 120
You are missing the Duration parameter.
I get this output:
Enabling tracing for 120 seconds... Observing system behavior... Analyzing trace data... Analysis complete.
Energy efficiency problems were found.
3 Errors 7 Warnings 28 Informational
See C:\longtrace.html for more details.
I get this output in longtrace:
Power Efficiency Diagnostics Report Computer Name XXXX Scan Time 2021-03-10T17:49:44Z Scan Duration 120 seconds System Manufacturer LENOVO System Product Name XXXX BIOS Date 11/12/2020 BIOS Version N1FET74W (1.48 ) OS Build 19042 Platform Role PlatformRoleMobile Plugged In true Process Count 256 Thread Count 2613 Report GUID {1986b545-0768-4151-9880-4fd7ef9cd836} Analysis Results Errors Power Policy:802.11 Radio Power Policy is Maximum Performance (On Battery) The current power policy for 802.11-compatible wireless network adapters is not configured to use low-power modes. Power Policy:Sleep timeout is disabled (Plugged In) The computer is not configured to automatically sleep after a period of inactivity. CPU Utilization:Processor utilization is high The average processor utilization during the trace was high. The system will consume less power when the average processor utilization is very low. Review processor utilization for individual processes to determine which applications and services contribute the most to total processor utilization. Average Utilization (%) 22.73
Since my computer is working properly, this output is mostly informational.