Thinkpad T480 - Throttlestop questions

[unclewebb]

I'll put it into 'Balanced'

After you do this, try using sleep mode even for a minute or two. It will be interesting to see if any C8, C9, C10 package standby is reported.

So wouldn't that imply the entire CPU package is 90%+ in C7 too?

No. Individual core standby and CPU package standby are two different things. It is easy for some bad code to block the CPU from entering the deep package C states.

 

[chunky_lafunga]

Here are my results after selecting 'Balanced' in TS and putting into Sleep for 1-2 minutes;

By the way is there any reason I can't leave it in 'High Performance' and go into Sleep mode?

 

[unclewebb]

I can't leave it in 'High Performance' and go into Sleep mode?

This is a Microsoft limitation. Microsoft have gone out of their way to hide the High Performance power plan on computers that support connected standby. This power plan still exists. It is just well hidden. When you use ThrottleStop to access this plan, it will immediately show up in your Windows Power Options. As soon as you switch back to the Balanced power plan, the High Performance one will disappear again.

As far as I know, connected standby only works correctly when you are using the Balanced power plan.

 

[chunky_lafunga]

This is a Microsoft limitation. Microsoft have gone out of their way to hide the High Performance power plan on computers that support connected standby. This power plan still exists. It is just well hidden. When you use ThrottleStop to access this plan, it will immediately show up in your Windows Power Options. As soon as you switch back to the Balanced power plan, the High Performance one will disappear again.

As far as I know, connected standby only works correctly when you are using the Balanced power plan.

That's some good knowledge and aligns with what I've experienced with the finicky power plan options.

BTW I just updated my post above with my Sleep results attached now. Looks like I'm not going into C8, c9, c10.

 

[unclewebb]

Here is some more info about connected standby. You can use the powercfg command to see if your laptop is setup to use this feature. There have been a lot of problems so I am sure that some manufacturers have decided to disable this rather than deal with complaints that it does not work correctly.

Connected Standby energy efficiency

Connected Standby energy efficiency

docs.microsoft.com

• The system must support Connected Standby. To verify that this sleep state is supported, open a command prompt window, and run the following command:
  powercfg /a
  If your system supports Connected Standby, Standby (Connected) will be in the list of available sleep states.
• Ensure that the system is running on DC (battery) power. Energy efficiency jobs are designed to run only on mobile devices. If a battery is not detected, you will receive an error.

 

[chunky_lafunga]

Here is some more info about connected standby. You can use the powercfg command to see if your laptop is setup to use this feature. There have been a lot of problems so I am sure that some manufacturers have decided to disable this rather than deal with complaints that it does not work correctly.

Connected Standby energy efficiency

Connected Standby energy efficiency

docs.microsoft.com

• The system must support Connected Standby. To verify that this sleep state is supported, open a command prompt window, and run the following command:
  powercfg /a
  If your system supports Connected Standby, Standby (Connected) will be in the list of available sleep states.
• Ensure that the system is running on DC (battery) power. Energy efficiency jobs are designed to run only on mobile devices. If a battery is not detected, you will receive an error.

Looks like Standby (Connected) is not available for me, and therefore explains why I don't have C8, C9, C10 residency when in Sleep mode?

L

 

[unclewebb]

why I don't have C8, C9, C10 residency when in Sleep mode?

I did some testing last night on my daughter's 8550U. Package C8, C9 and C10 are only reported during sleep / standby when running on battery power. When plugged in, it shows 0.0 for all three values.

When running, it reports Package C8.

 

[chunky_lafunga]

I did some testing last night on my daughter's 8550U. Package C8, C9 and C10 are only reported during sleep / standby when running on battery power. When plugged in, it shows 0.0 for all three values.

When running, it reports Package C8.

Just realized I forgot to thank you for all your help on this thread. Thanks @unclewebb