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Fanfold Paper
Mensajes publicados: 14
Registrado: ‎10-28-2015
Location: NH
Mensaje 1 de 28 (1.528 Visitas)

Thinkpad 10 GEN 2 Throttles badly under normal loads

I have new TP 10 Gen 2 with 4GB/128GB.  Under nromal vidoe and cpu loads it bogs down afer 5-10 minutes to 480 MHZ and stays there. Back panel is very warm in lower right quadrant.   Video becomes a slide show. Bigger spreadsheets recalc very slow.  Can't multi-task. Web browsing bogs down on many sites.  

 

Researching this I found a TP 10 Gen 2 review describing exactly this behavior (Google "Thinkpad 2d gen  Noteboodk Check").  I also have the original TP 10 with the older, Bay Trail processor and it is MUCH faster in normal use.  I have also used a Surface 3 with the same processor and it runs rings around the new TP 10.  My BIOS, Lenovo updates and windows updates are cudrrent to 11/1/15.  Lenovo and Windows diagnostics are clean. 

 

Does Lenovo know what (cooling? firmware?) is causing this?  Is a solution pending or should I return this unusable unit?

Bit Torrent
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Mensaje 2 de 28 (1.486 Visitas)

Re: Thinkpad 10 GEN 2 Throttles badly under normal loads

[ Editado ]

Unfortunately it seems to be a "feature" of this model Emoticono frustrado the review verdict is:

 

Cons

- heat distribution
- throttling even with light workloads
- system performance

 

You can hope for a BIOS update only but I can't imagine a noticeable improvement. You can also try to tweak power profile but I don't think it can improve it because it is controlled by Intel thermal management.

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Lenovo Staff
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Mensaje 3 de 28 (1.443 Visitas)

Re: Thinkpad 10 GEN 2 Throttles badly under normal loads

Lenovo is investigating customer reports of throttling on ThinkPad 10 Gen 2 tablets. Root cause has already been determined and a solution is being put in place.

 

I will post again as more information becomes available.

 

Thank you,

Fanfold Paper
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Mensaje 4 de 28 (1.401 Visitas)

Re: Thinkpad 10 GEN 2 Throttles badly under normal loads

Thank you for the clear guidance, Amy.

 

If yolu can provide an ETA, that would be helpful..   Here's why: Lenovo warranty services identified the issue as a "failing element" and is sending a box for me to return the unit for service.  If you can let me know if the underlying cause will best be served by waiting for a generic solution from your group, please let me know so that I don't undertake an unnecessary repair effort with your service tech's.

 

(Or alternatively, if they already know the solution and it requires physical repair, let me know and I'll send in the unit for repair.)

 

Thank you again for being responsive!

Lenovo Staff
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Mensaje 5 de 28 (1.397 Visitas)

Re: Thinkpad 10 GEN 2 Throttles badly under normal loads

Sending your tablet into the depot is a good choice. If they are able to resolve the issue via software, they will do so. If not, then they will replace hardware.

 

Since a symptom can have several causes, this will ensure you receive a repaired tablet when the work is completed.

 

Thank you,

Fanfold Paper
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Mensaje 6 de 28 (1.259 Visitas)

Re: Thinkpad 10 GEN 2 Throttles badly under normal loads

It may not be your fault, Amy, but your advice to send my TP10 Gen 2 to Lenovo for service turned out to be bad advice.

 

I sent it back with a concise desicriiption of the throttling problem, and under what conditions it appears.  I also referenced the Notebook Check article which showed the same behavior.  I was an English major, and didn't waste words, so I'm sure it was clear.

 

After 10 days with the unit, they sent it back with the notation "system hangs" and "reinstalled OS".  The throttling is still there in spades, exactly as before.  I had already reset the computer, I didn't need them to do that.  I never complained about the system hanging.  It appears they ignored my problem description and may be unaware of the generic problem with the Gen 2.

 

Don't the service techs test their own repairs? I paid for a service ocntract, and I am not impressed.

 

Doesn't Lenovo do real-world testing of their products before RTM?  Not your proudest moment.

 

The behavior is there both in measurement and in real-life use.  From a cold boot, it works normally for a while, with the CPU bouncing all around with the load, but up to the turbo limit of 2.4 GHz.  Then after a while it steps down to a range that remains below 1.0 or 1.1 GHz.  Then a bit later it steps down to about 480 MHz.  I understand that 480 MHz is the idling level, but this is under load and is throttling, not idling.   With wifi video, for example, the visible performance drops from smooth motion (or sometimes mild stuttering, depending on source) to serious stuttering or a slide show.   Other forms of multi-tasking also can cause the same problem, although going down the second step less often.

 

I have also run this unit side by side with last year's TP10, which I also own.  Doing the same things for the same period, last year's model, with the Bay Trail cpu, is almost always faster under sustained load (although it wasn't a speed demon either).  

 

You said you had identified the source of the problem and were working on a solution.  Unless you have a retrofit in your back pocket for sold units, I'm returning this next week.  (I won't rant about the decision to remove the constantly-useful rotation lock in this year's model, either, but suffice it to say, these decisons are what is eroding the loyalty of your long-time thinkpad customers. It seems less like the traditional attention to detail and user ergonomics to something much more generic and vanilla.)

 

Meanwhile, buyer beware.

Paper Tape
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Location: Cary, NC
Mensaje 7 de 28 (1.242 Visitas)

Re: Thinkpad 10 GEN 2 Throttles badly under normal loads

I will be watching this thread with interest. I just ordered a ThinkPad 10 gen 2.

Amy, and Lenovo, helped me a ton with a miix 2 11 problem upon the upgrade to Windows 10. I do notice that the miix also throttles down very aggressively.

Amy can you share any additional information on the ThinkPad 10 and throttling? Do you know if it affects all units? My ThinkPad 10 is on order and this is giving me some pause.

Thanks
Fanfold Paper
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Mensaje 8 de 28 (1.236 Visitas)

Re: Thinkpad 10 GEN 2 Throttles badly under normal loads

Continuing on from my earlier comment on continued throttling, the situation forces me to reflect on what the TP10 Gen 2 does well or not so well, as the basis for keeping it or not.

 

The way I use the TP10 most often is for note taking with clients, sometimes for several hours.  At this, both the original and Gen 2 versions excel, but the Gen 2 is better.  The new pen technology of the Lenovo Pen Pro is excellent!  (It resolves the accuracy/parallax problem of the older Wacom technology.) The TP 10  is so handy, and just the right size, with the light weight, lack of a fan, and the lightweight flip cover.  Ideal replacement for a pad of paper in a paperless office, using One Note.  Much less of a compromise than bigger/heavier tablets like the Surface Pro tablets (I have one of those, too).

 

This use-case is NOT affected by throttling.

 

The light weight and portability also make it a natural temptation for personal video consumption and light web browsing.  This use case IS affected by throttling if you open a lot of browser tabls, and then, say, multi-task with email, but it does work well on a casual basis.

 

Third, just looking at email and word processing, throttling doesn't seem to affect this use case either.  I just LOVE the ultrabook keyboard.  I know keyboards are subjective, but this is a high-quality keyboard with long key throw and nice mechanical feel.  Amazing for a small, relatively less expensive computer, although the keyboard does add weight.  My accuracy is as high as with a full size thinkpad keyboard, although I miss the trackpoint nub.  The keys and spacing are FULL SIZE when  you hold the seemingly-diminutive keyboard up to a full-size keyboard.  The shrinkage is in the row of function keys, and in the narrower footprint of the enter key and other peripheral keys. I really like the layout as well, and this is usually a limitation of smaller keyboards.  Wonderful implementation by Lenovo, at least in my book.

 

I find the keyboard a reason to choose the TP!0 over, say, the Surface 3, all by itself.  This use-case is not affected by throttling.

 

In sum, I am a perfect customer for this form factor.  I am so irritated that the "100%" improvement of the Cherry Trail chip over the Bay Trail predecessor's graphical performance is not realized in practice for viewing sessions longer than about 10 minutes.  Web surfing can start  to crawl at times when under load as well.  I feel a sense of relief when I switch over to a faster unit folllowing  a session of stuttering and slow web-draws on the TP 10.  (Again, light use is fine; it is longer work sessions and multi-tasking that hurt.)

 

The fingerprint reader is a nice add for the more commonly-sold models, especially for tablet (without keyboard) use.

 

There are some minor grouses about Gen 2 over Gen 1, but they are not decisive. Removal of the physical rotation-lock. the light-leackage of the new IPS panel looks like an aurora borealis compared to the deep black of my earlier TP 10.  The new screen is not as bright, but this isn't much of a problem since i don't use it outside much.

Bit Torrent
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Mensaje 9 de 28 (1.227 Visitas)

Re: Thinkpad 10 GEN 2 Throttles badly under normal loads


JanesJr2 wrote:

 

After 10 days with the unit, they sent it back with the notation "system hangs" and "reinstalled OS".  The throttling is still there in spades, exactly as before.  I had already reset the computer, I didn't need them to do that.  I never complained about the system hanging.  It appears they ignored my problem description and may be unaware of the generic problem with the Gen 2.


As expected. Unmark the current answer as solution because it may confuse other customers. As I said it is design issue (again) that can not be resolved by a software update without affecting performance.

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ThinkPad (1992 - 2012): R51, X31, X220, Tablet 8.
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Bit Torrent
Mensajes publicados: 1.800
Registrado: ‎11-28-2007
Location: CZ
Mensaje 10 de 28 (1.225 Visitas)

Re: Thinkpad 10 GEN 2 Throttles badly under normal loads


JanesJr2 wrote:

the light-leackage of the new IPS panel looks like an aurora borealis compared to the deep black of my earlier TP 10.  The new screen is not as bright, but this isn't much of a problem since i don't use it outside much.


Do you use the same brightness setting when you compare it ? It is all about "cutting costs" again, saving on panel layers.

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ThinkPad (1992 - 2012): R51, X31, X220, Tablet 8.
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