Issue with power limit throttle [Throttlestop]

[SamTheGreat]

HP Envy x360 15-bp14cl - i7-8550u (default TDP of 15w), MX150-0

Using Throttlestop and it's "Disable and Lock Turbo Power Limits" feature, I have been able to successfully turbo infinitely, to the point of thermal throttling, even after repasting using MX-4 paste. Except I'm still plagued with one issue - upon moving the laptop (or it's hinge more specifically), the laptop forcefully power limit throttles back to 15 watts, and as a result performance falls with it. I've tried uninstalling and disabling Intel DPTF, but all of them broke the "Disable and Lock Turbo Power Limits", and forced the CPU to operate at a constantly varying 12-15 watts. Under device manager, disabling "Intel(R) Integrated Sensor Solution" had no effect, and still caused PL1 throttling once the chassis is in motion, and it caused my screen autorotation to stop working. Another device called "Intel(R) Power Engine Plug-in" cannot be disabled, but only uninstalled, which also didn't fix the power limit throttling, and also caused autorotation to stop working. Also trying to change the HP CoolSense mode from off to on and back off, also made no difference.

In most cases I can reply pretty quickly and am fairly adept to computers, so I'm afraid of a technical term or two

Thanks for your help,
Sam

 

[unclewebb]

There are 3 unique sets of turbo power limits. The ThrottleStop TPL window gives you access to the first set of power limits and the Disable and Lock feature takes care of the second set of turbo power limits but there is still a third set that only some manufacturers are using. ThrottleStop and Intel XTU have no access to this third set of power limits. It is controlled by the EC. If this power limit is set to 15W, changing the other values will not accomplish anything. The lowest value always wins.

I have never heard of this being tied to laptop movement but anything is possible. There is no easy way to get around this problem you are having.

No HP laptops for me. I got lucky when I bought this Lenovo C930. There are no OEM power limits holding this 8550U back.

http://imgur.com/eo0J744

 

[SamTheGreat]

Would supplying a log file be of any help to prove if it is an EC issue? I have been thinking of trying to use a UEFI shell to see if I can change values on the hidden advanced page in the BIOS.

Here's a few images in the mean time. I'm pretty sure I've tuned everything I can, including undervolting.

 

[ereko]

Would supplying a log file be of any help to prove if it is an EC issue? I have been thinking of trying to use a UEFI shell to see if I can change values on the hidden advanced page in the BIOS.

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Here's a few images in the mean time. I'm pretty sure I've tuned everything I can, including undervolting.

Switch your long max tpl to 50. short to 80 and turbo timelimit to 28. Dont believe everything you read at internet. And put back your default turbo ratio limits.

 

[unclewebb]

Your screenshot shows that power consumption is at 33.6W and ThrottleStop reports HOT. Your CPU is thermal throttling, not power limit throttling. Open up Limit Reasons and move your laptop around and see if the type of throttling changes.

This is a locked CPU so the default multipliers of 40, 40, 37, 37 are fine. Increasing them does not change anything.

Default turbo time limit is 28 seconds. No need to change that or the PP0 Time Limit. 3,670,016 seconds (42+ days) is an awfully long time. Lots of YouTube videos recommend this. Not sure why. No need to check the PP0 Power Limit.

Have a look in the Options window. The Intel default PROCHOT Offset is 0. Your laptop set this to 9 which lowers the thermal throttling temperature from 100°C down to 91°C. If this is not locked, I would change this. I would try 0. A PROCHOT Offset value of 3 is a common value to use for this setting. Lock it when finished making adjustments.

Do not check Set Multiplier. Your CPU is using Speed Shift Technology (SST) so the Set Multiplier function is not used.

 

[Caring1]

It may be possible when used with the screen fully open in Tablet mode it changes to a low power mode also, do as mentioned above by Unclewebb and check if there are changes.

 

[SamTheGreat]

Thanks for the suggestions with the FIVR and TPL changes. I applied them before this following round of testing.

(it's hard to get my laptop to thermal throttle from a cold start, but at 95% next to the limits button it said "HOT", and in the limits window, "Thermal", did show up in yellow, which I understand for meaning it happened briefly/recently)

I didn't even fold the laptop into tablet/tent mode. All I did was pick up the chassis, and moved around for a few seconds.

I enabled log file, for the duration of the unlocked turbo test, the short cool down period and then the test with PL2 getting triggered.

 

[unclewebb]

PL2 is the short turbo power limit and it is being forced to 15W when you move your laptop. I do not know of any way around this issue. It is not easy to get around power limit changes that are forced on your laptop by the EC.

This is the first I have heard of "motion sensitive" throttling. Your results confirm that yes, it is real!

Maybe some engineer thought that if you are using your laptop on your lap and it is moving around, play it safe and limit it to 15W to protect ones private parts. If it is sitting secure on a desktop then it is open season. Let it run at full speed without any power limit throttling. That might be the logic behind this unique feature.

 

[SamTheGreat]

Dang, that sucks, but it's what you get for expecting fast in a small package, something has to suffer.

Thanks for taking the time to help with this issue.