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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

2019-01-06, 18:15 PM

My client has been using Lenovo E480 and they have (touch wood) been stable - key requirement for business user IMO. They needed four new laptops and the A485 popped up and, madly, I thought I'd give AMD another chance. I'm rather worried about this now because threads like this worry me. 

 

My main concern is Wi-Fi stability. Is there any chance any of the issues discussed here could be effecting Wi-Fi? I work remotely from this client and only visit them to do the initial WIndows configuration and then install my remote support tool (SimpleHelp). I then do the rest of configuration remotely, e.g. install Office 2016, add printers, other software etc. 

 

On several occasions, I've been merrily doing stuff remotely and the remote session has just frozen. It sometimes comes back or occasionally goes through the "Reconnecting" phase in SimpleHelp - which happens if the connection is lost for a reasonable time. Just now I've been configuring a new A485 and an older E480 side by side. A485 has frozen 2/3 times whereas the E480 has had a rock solid connection.

 

PS. The A485 mentioned above has just been upgraded to BIOS 1.14. Out of the four, only one has gone to a new user and they reported everything was okay. Client needs some more laptops so going back to E480 until I hear better things...

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24 Posts

11-01-2018

United Kingdom of Great Britain and Northern Ireland

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  • Message 72 of 133

Re: Thinkpad A485 - Bios 1.05 worsens throttling further

2019-01-06, 21:36 PM

AMD are going to start offering Mobile Drivers directly from AMD/Desktop branch, not sure if that includes firmware.

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20 Posts

10-11-2018

United Kingdom of Great Britain and Northern Ireland

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  • Message 73 of 133

Re: Thinkpad A485 - Bios 1.05 worsens throttling further

2019-01-07, 11:46 AM

I was able to configure the DSDT tables to lock TDP to 30W, yet the laptop has a hard thermal lock which means once the laptop reaches 72C it'll exhibit the same buggy behaviour with half the threads clocking down to 1.5ghz and half clocking to 3.2ghz, so performance actually drops in activities which require more than a couple minutes of power, even when forcing the fans to 100%.

 

This seems like the only laptop that exhibits this kind of behaviour, so we can at least be proud to have the most gimped laptop of a gimped platform!

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33 Posts

10-06-2016

United Kingdom of Great Britain and Northern Ireland

34 Signins

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  • Posts: 33
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  • Message 74 of 133

Re: Thinkpad A485 - Bios 1.05 worsens throttling further

2019-01-07, 11:59 AM

Apologies for not reading the entire thread as it's quite long but what tool/software can one install to monitor this issue?

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20 Posts

10-11-2018

United Kingdom of Great Britain and Northern Ireland

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Re: Thinkpad A485 - Bios 1.05 worsens throttling further

2019-01-07, 12:08 PM

For monitoring clocks, TDP and temps, you have to use AMD uProf for an accurate reading

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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

2019-01-07, 12:08 PM

I found the same issue. Throttling starts at 60 c then at 72 a hard limit. I have been trying to figure out where to control fan speed in the dsdt or find the 72 limit and up it but have been unsucessfull thus far. How did you up the fan speed?

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33 Posts

10-06-2016

United Kingdom of Great Britain and Northern Ireland

34 Signins

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Re: Thinkpad A485 - Bios 1.05 worsens throttling further

2019-01-07, 12:10 PM
Thanks. Not heard of that b4.
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20 Posts

10-11-2018

United Kingdom of Great Britain and Northern Ireland

56 Signins

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  • Message 78 of 133

Re: Thinkpad A485 - Bios 1.05 worsens throttling further

2019-01-07, 12:13 PM

I used a program called tpfancontrol, which forces the fans to 3500RPM iirc. It works, but it still doesn't dissipate enough air to cool it below 72C for extended periods of time. Seems like we'll need to hope Lenovo removes the ridiculously tight thermal constraints for more power. It works fine on the E485/585 and subsequent Ideapads, so they seem to have only done this for the A485 for whatever reason.

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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

2019-01-07, 12:30 PM

Okay I will try that but you right it still does not dissapate enough heat. I knew the tdp limit was not throttling it as high performance mode sets it to 22 and quiet to 15. In the dsdt where the 22 and 15 are coded I have found what I think are temp limits they are set to 76 for quiet and 86 for performance but there is code elsewhere limiting to 72. 

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19 Posts

12-15-2018

United States of America

48 Signins

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  • Posts: 19
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  • Message 80 of 133

Re: Thinkpad A485 - Bios 1.05 worsens throttling further

2019-01-07, 15:02 PM

Would you mind sharing what you put into the ini file for tpfancontrol? Just curion I am trying some settings but not sure what the max is for full speed.

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