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24 Posts

11-01-2018

United Kingdom of Great Britain and Northern Ireland

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  • Message 11 of 133

Re: Thinkpad A485 - Bios 1.05 worsens throttling further

2018-11-09, 23:54 PM

Is there anyone running Linux?

 

Do we know if this issue is isloated to BIOS? I think Linux has more control over the SMU.

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17 Posts

10-05-2018

United States of America

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  • Message 12 of 133

Re: Thinkpad A485 - Bios 1.05 worsens throttling further

2018-11-10, 0:10 AM

I'm running Linux but have the same issues. It's characterized (at least for me) by very quick CPU frequency fluctuations, much faster than you'd see with scaling governors or dynamic power management. Often my CPU jumps directly between 1300 and 2500 mhz and then back within a half second.

 

I thought maybe the issue would be confined to UEFI but it's not. Legacy booting from a USB (since I can't from the NVME drive) still shows weird frequency fluctuations and performance problems.

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24 Posts

11-01-2018

United Kingdom of Great Britain and Northern Ireland

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  • Message 13 of 133

Re: Thinkpad A485 - Bios 1.05 worsens throttling further

2018-11-10, 0:49 AM

Wait.  what? You can't boot from NVMe? I've literally just purchased a 1TB NVMe drive, it better work.

 

Interesting, if you disable AMD PowerNOW or whatever it is, it should lock it to the base freq

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17 Posts

10-05-2018

United States of America

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  • Message 14 of 133

Re: Thinkpad A485 - Bios 1.05 worsens throttling further

2018-11-10, 0:52 AM

I probably should have been more specific. I can't boot in legacy mode from NVME since the drives are so new. Booting in UEFI mode works just fine.

 

Interestingly enough I've got PowerNow disabled but still have frequency fluctuations. They only started appearing as of the latest BIOS update, as I monitored them when testing on the previous BIOS versions.

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24 Posts

11-01-2018

United Kingdom of Great Britain and Northern Ireland

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  • Message 15 of 133

Re: Thinkpad A485 - Bios 1.05 worsens throttling further

2018-11-10, 1:00 AM

Saved me a heart-attack there :P

 

One of two things I think is happening:

  1. Lenovo is sharfting us, misconfiguring BIOS
  2. AMD's ASEGIA (Or whatever it's called) is sharfting us and Lenovo are just updating it

So before the update, you had PowerNOW disabled, and it was pinned at base freq?

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17 Posts

10-05-2018

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  • Message 16 of 133

Re: Thinkpad A485 - Bios 1.05 worsens throttling further

2018-11-10, 1:04 AM

Before the update it wasn't pinned at the base frequency; the CPU was able to scale normally and relatively gradually in constant increments at least. Now the frequencies jump amazingly quickly and all over the place, even with PowerNow still off.

 

Example video:

https://www.dropbox.com/s/qkwrjgt2z2bg73q/Plugged_in_performance.mp4?dl=0

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24 Posts

11-01-2018

United Kingdom of Great Britain and Northern Ireland

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  • Message 17 of 133

Re: Thinkpad A485 - Bios 1.05 worsens throttling further

2018-11-10, 1:33 AM

Did you try disabling everything that even remotely relates to power saving?

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17 Posts

10-05-2018

United States of America

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  • Message 18 of 133

Re: Thinkpad A485 - Bios 1.05 worsens throttling further

2018-11-10, 1:43 AM

Yep, that was the first thing that I did. I'm really hoping to hear from Lenovo soon, as I'm considering selling or returning this laptop as able. The A485 had the potential to be the best Ryzen laptop offered for a while, but right now it just doesn't seem like it, especially considering that a user tried to upgrade to a WQHD screen and it seems the motherboard possibly can't support it because there was no video output; I was hoping for this in particular.

 

The possibility of a Zen 2 laptop seems nice, but considering how long it took for Zen 1 to show up in laptops and considering even where the situation is as of right now, I'm not very hopeful on it being any time relatively soon.

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24 Posts

11-01-2018

United Kingdom of Great Britain and Northern Ireland

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  • Message 19 of 133

Re: Thinkpad A485 - Bios 1.05 worsens throttling further

2018-11-10, 1:52 AM

We're doing it the wrong way, we need to be bombarding their Twitter / Support lines, I don't even think Lenovo actually own forums.lenovo.com

 

:O you tried upgrading to a 4K Monitor?! I was going to do this, surely it's possible, it's just the display that's wired into the GPU.

 

Mine is on it's way, I wouldn't give up just yet, as long as we keep the pressure up, Lenovo will answer back, just need to keep bothering them with support tickets. They'll hate that.

 

Posting on here isn't going to solve anything.

 

Intel has had years to perfect it's Mobile APUs, give AMD a little breathing room, I'm sure 1.06 will fix a lot of the issues mentioned here.

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17 Posts

10-05-2018

United States of America

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  • Message 20 of 133

Re: Thinkpad A485 - Bios 1.05 worsens throttling further

2018-11-10, 2:01 AM

I agree, I think the situation needs to be elevated more to Lenovo support and other channels.

 

Someone on Reddit tried upgrading to a 2K screen, which would have been enough for me:

https://www.reddit.com/r/thinkpad/comments/9p6561/tried_upgrading_a485_to_wqhd_from_t480_no_luck/

 

I'm perfectly OK with AMD on their side of things. I mean high idle power consumption is OK with me; they'll work out the kinks over time. It's the OEMs that are making Ryzen mobile look like utter crap.

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