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bdemoss
What's DOS?
Posts: 1
Registered: ‎10-20-2019
Location: US
Views: 2,280
Message 151 of 230

Re: [X1C6/T480s] low cTDP and trip temperature in Linux

Hi -

 

I also have a P53 and (I believe) I was able to overcome the CPU throttling by setting

 

 

tuned-adm profile throughput-performance

See if that works for you.

 

tokyovigilante
Fanfold Paper
Posts: 20
Registered: ‎07-11-2019
Location: AU
Views: 2,053
Message 152 of 230

Re: [X1C6/T480s] low cTDP and trip temperature in Linux

I can report success with BIOS 1.20 on my X1Y4 (i7-8665U) on Fedora 31, I've been able to disable throttled and am now achieving all-core boost speads of 3.4-3.8Ghz during sustained compiles, with throttling at ~96 degrees and power use of 27-30W. 

 

Is throttled stil useful for undervolting? My power consumption at idle seems to have dropped to 7-8W also, so I'm getting 6-7hrs of battery life with the 4K screen, which I'm happy with.

 

I would not I could not use fwupdmgr in Linux or Lenovo Vantage in Windows to upgrade, and had to manually download and install the Windows-based upgrader. However now that I have upgraded fwupdmgr is offering BIOS 1.22 with "microcode updates." Can anyone comment if this is more than just the latest SPECTRE et al. mitigations?

intelfx
SCSI Port
Posts: 46
Registered: ‎09-15-2016
Location: RU
Views: 2,045
Message 153 of 230

Re: [X1C6/T480s] low cTDP and trip temperature in Linux


@tokyovigilante wrote:
Is throttled stil useful for undervolting?

Yes, as well as PL1/PL2 adjustments (AFAIU artificial power limits didn't go anywhere, they were just made less stupid).

tokyovigilante
Fanfold Paper
Posts: 20
Registered: ‎07-11-2019
Location: AU
Views: 2,035
Message 154 of 230

Re: [X1C6/T480s] low cTDP and trip temperature in Linux


@intelfx

Yes, as well as PL1/PL2 adjustments (AFAIU artificial power limits didn't go anywhere, they were just made less stupid).


Great, thanks.

mudrii
Paper Tape
Posts: 6
Registered: ‎09-15-2019
Location: SG
Views: 1,944
Message 155 of 230

Re: [X1C6/T480s] low cTDP and trip temperature in Linux

Thank you very much for the update.

 

I would appreciate if the BIOS fix will come even without LVFS like BIOS iso or even windows update?

 

Thx

johkaise
Serial Port
Posts: 17
Registered: ‎05-08-2015
Location: DE
Views: 1,755
Message 156 of 230

Re: [X1C6/T480s] low cTDP and trip temperature in Linux

Hello mudrii,

 

to answer your question. The fix will be for sure released too as usual way: BIOS Update (Bootable CD) and as BIOS Update Utility (Windows), additionally some models will receive it through LVFS.

As am I  we all still have to wait for further investigation before Lenovo will publish a list of all affected models and release also the bios updates.

 

mudrii
Paper Tape
Posts: 6
Registered: ‎09-15-2019
Location: SG
Views: 1,675
Message 157 of 230

Re: [X1C6/T480s] low cTDP and trip temperature in Linux

Thx for an update I am running on NixOs and tune package is not in Nix repo if I find time will make a package, but still is better to have proper BIOS update rather then hack around
nrp
Paper Tape
Posts: 2
Registered: ‎10-25-2019
Location: IN
Views: 1,449
Message 158 of 230

Re: [X1C6/T480s] low cTDP and trip temperature in Linux

I own a ThinkPad L380 Yoga which has the same problem. LVFS doesn't seem to have a fw update for this model yet, will it be supported ?

nesbmido
What's DOS?
Posts: 2
Registered: ‎10-27-2019
Location: EG
Views: 1,222
Message 159 of 230

Re: [X1C6/T480s] low cTDP and trip temperature in Linux

I own a Thinkpad E490, and I have the same throttling problem.

Sub0
Paper Tape
Posts: 2
Registered: ‎09-25-2019
Location: FR
Views: 1,179
Message 160 of 230

Re: [X1C6/T480s] low cTDP and trip temperature in Linux

Real improvement with 1.15 firmware on X390. 

https://fwupd.org/lvfs/device/com.lenovo.ThinkPadN2JHT.firmware

No more throttling with daily use (it seems)

 

Thanks Lenovo !

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