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33 Posts

10-06-2016

United Kingdom of Great Britain and Northern Ireland

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Re: Thinkpad A485 - Bios 1.05 worsens throttling further

2019-02-15, 16:00 PM

>My conclusion is don't buy Lenovo laptops in the future for all this kind of low quality hardware/software

 

 

Dell laptops are often far more expensive than Lenovo - you get what you pay for? That said, my main client uses Lenovo laptops (mainly Thinkpad E480) and in terms of failure rates as to when we used Dell, it's about the same. 

 

Problem with AMD Ryzen is that we've been in the Intel wilderness for so long that new chipsets are bound to cause hiccups.

 

Not that Lenovo should be let off the hook here as it does sounds like a lot of diagnosis of the problem has been done - for free - by end users. They need to fix it. I want there to be competitors to Intel but for now, we've gone back to the Intel E480.

 

We once dallied with HP Probooks - boy was that a mistake...

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19 Posts

12-15-2018

United States of America

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Re: Thinkpad A485 - Bios 1.05 worsens throttling further

2019-02-15, 23:45 PM

I wiped and reinstalled windows. I did not install hot keys nor the power management driver. I used the ryzen adj tool and was able to get 3.1 on all cores until I hit the 80c wall. I will have to use tpfan to engage the fan at full sooner. Still seems to be some thermal limit in the bios...

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100 Posts

08-25-2018

China

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Re: Thinkpad A485 - Bios 1.05 worsens throttling further

2019-02-15, 23:50 PM

There should be a hard temperature limit and a wattage limit. 2 in 1 throttling. Happens in every single thinkpad, yoga, so on that Lenovo has had since 2016. 

 

Surprised to see that they fixed it for the E485 though 

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19 Posts

12-15-2018

United States of America

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Re: Thinkpad A485 - Bios 1.05 worsens throttling further

2019-02-15, 23:58 PM

Too bad I don't know machine level code... And how to edit a bios...

 

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28 Posts

10-24-2018

United States of America

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  • Message 105 of 133

Re: Thinkpad A485 - Bios 1.05 worsens throttling further

2019-02-18, 14:38 PM

 wrote:

 

My conclusion is don't buy Lenovo laptops in the future for all this kind of low quality hardware/software, it's not the thinkpad it used to be. Besides the surface materials are really difficult to maintain. It's just not worth it.


Between the thermal/throttling issues and the new external display issues I've been having (https://forums.lenovo.com/t5/ThinkPad-T400-T500-and-newer-T/A485-AMD-Kit-Driver-25-20-1401-6-1-Distorted-Display-with-Dock/td-p/4342323), I think you might be right here. 

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27 Posts

12-25-2018

United States of America

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Re: Thinkpad A485 - Bios 1.05 worsens throttling further

2019-04-25, 0:23 AM

whelp, the E485/585 apparently got a BIOS update that fixed a huge problem, thermal throttling with the absurd 70c limit bumped to 85c and that has done wonders for them... I really hope we get that update soon!

 

and with 32GB of RAM, please let me up my VRAM setting :(

 

also: https://forums.lenovo.com/t5/Other-Linux-Discussions/ThinkPad-A485-TSC-broken-on-BIOS-1-16/td-p/4354663

for the linux folks

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24 Posts

11-01-2018

United Kingdom of Great Britain and Northern Ireland

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Re: Thinkpad A485 - Bios 1.05 worsens throttling further

2019-04-25, 6:36 AM

Hey Guys,

 

I don't know if anyone has posted this yet, but it should be possible to control STAPM via ACPI Calls, this discovery was made by u/MinecraftAddict131 & Samir Ibradžić.

 

https://github.com/sibradzic/stapmlifier

 

The TL;DR is the STAPM limits are in the DSDT ACPI Tables, however these vary between vendors and models, they found an ACPI Method (ALIB Specifically) you can call, that sets the DPTCi (Dynamic Power and Thermal Configuration Interface) to what ever you want.

 

I don't own an AMD Ryzen Mobile Laptop, but know people here really want to break that 80C wall, give it a go and see if it works!

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27 Posts

12-25-2018

United States of America

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Re: Thinkpad A485 - Bios 1.05 worsens throttling further

2019-04-25, 21:22 PM

Yes IIRC his work was used for RyzenAdj.

 

Still, BIOS/MC can kick in and override these adjustments so Lenovo needs to actually fix this.

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8 Posts

02-15-2019

United States of America

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Re: Thinkpad A485 - Bios 1.05 worsens throttling further

2019-05-13, 22:34 PM

If we can detect when those settings are been overwritten, then we can still quickly set those settings again, the problem is that the libs used in RyzenAdj, does not currently support checking the state of the CPU.

 

As for Lenovo, I don't think they will ever change those settings in the BIOS, it is been done like this intensionally. Besides there hasn't been any updates to the drivers for A485 since Feb, not just the BIOS, but any drivers. Go figure...

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28 Posts

10-24-2018

United States of America

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Re: Thinkpad A485 - Bios 1.05 worsens throttling further

2019-05-14, 12:50 PM

Yeah, I'm pretty sure we're stuck with the awful throttling.

 

Lesson learned for me I guess. Lenovo isn't what it used to be. 

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