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3 Posts

09-25-2019

France

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

2019-09-25, 17:52 PM

Nice to see that there is some move, and thanks a lot for the clear information (the few I can understand !)

 

As Hank_Shrader reported a few days ago, X390 is affected as well (all recent device it seems) and I can confirm the 15W fall after a few second of high load.

 

Hope the fix will concern every models !

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2 Posts

09-13-2019

Australia

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

2019-09-26, 0:37 AM

Hi Mark,

 

Thanks for the updates, much appreciated!

 

I just wanted to confirm that my T590 is also affected by this issue - please add the T5x0 series to the list!

 

Thanks

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26 Posts

06-23-2019

Canada

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

2019-09-26, 4:23 AM

This is exciting, and I'm glad to see Lenovo solving issues with Linux.  

 

Quick question about the current firmware update.

 

fwupmgr is reporting that there's an update for the "ThinkPad X1 Carbon 7th / X1 Yoga 4th Thunderbolt Controller" however the instructions say that "Before update, set the Thunderbolt BIOS Assist Mode to "Disable" in BIOS setup under Config > Thunderbolt 3."  That option in the BIOS is greyed out and not selectable.  Is it safe to apply this update?

 

Also the system firmware update linked by Mark earlier is missing checksums, are those going to be added in the near future?

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1 Posts

09-26-2019

United States of America

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

2019-09-26, 7:08 AM

Hello!

 

Lenovo Thinkpad L580 is also affected by this issue. It would be great to get a fix for this model too.

 

Thanks.

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55 Posts

05-13-2011

United Kingdom of Great Britain and Northern Ireland

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

2019-09-26, 16:28 PM

Hi,

 

Thanks for this - I successfully installed the new EC firmware on my X1C7 through fwupd, but the BIOS option doesn't seem to be showing up. I'm on BIOS 1.13.

 

The fwupd page for the BIOS that you linked to has a warning "Firmware has no attestation checksums", could that be why?

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12 Posts

10-10-2018

Germany

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

2019-09-26, 19:21 PM
Hello!

Lenovo Thinkpad P1 Gen 2/2019 is also affected by this issue. It would be great to get a fix for this model too.

Thank you.
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1 Posts

09-26-2019

United States of America

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

2019-09-26, 21:23 PM

Hello. So as a new thinkpad T470 owner running linux mint, and a newbie linux guy, what can I do about this now?

Just sit tight and wait for a fix?

Also, in general terms, are we talking a big permance dip for an average user, or something more minor in everyday performance?

I'm assuming we'd still see better performance than  windows, right?

Thank you!

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584 Posts

07-22-2019

Canada

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

2019-09-27, 0:12 AM

Hi,

 

I got the following replies from the firmware team:

 

For the Thunderbolt mode:
"This is expected behavior. By the BIOS default setting, Kernel DMA Protection is Enabled (=On). And Thunderbolt BIOS Assist Mode is set to Disabled (=Off) with non-selectable state. Unfortunately, BIOS version 1.18 or older version has a problem that the Thunderbolt BIOS Assist Mode On/Off state is not reflected the actual state. If you want to confirm, please change Setup UI from Graphical (=Default) to Simple Text"

 

On the checksums:

"This is a restriction of our BIOS build process and, I think, all other our BIOS images are same situation. Since our BIOS has the digital signature for binary itself, the modified binary can be detectable and such modified BIOS cannot be installed in our system"

 

Hope that helps!

Mark

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584 Posts

07-22-2019

Canada

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

2019-09-27, 0:27 AM
It really depends on your workload - it has an impact if you're doing something CPU intensive but for just regular use my guess would be you probably wouldn't notice.
Maybe others who have tried the update can comment on how they find it. For me I've mostly been doing kernel builds on my X1C7 and they have gotten faster since the firmware update - but they weren't bad beforehand.
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9 Posts

08-28-2019

Slovenia

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

2019-09-27, 11:13 AM

I saw on lvfs that there is an update for T490

https://fwupd.org/lvfs/device/com.lenovo.ThinkPadN2IET.firmware

 

Is there any plan to release the same update for t590 as it basicaly is the same only bigger or would this version work also on t590?

 

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