x220 i5 very low performance while on battery.

I know Windows and Intel CPU downclock itself while on battery but sometimes it almost feels like freezing, especially during web surfing.

Sometimes when I load pages with Flash, Chrome processor lose response and take long time to back on. It is very weird. I erased all setting (include Google cloud sync) and re-installed but same thing happens. Probably Chrome integrated Flash problem? or similar to i7 throttling issue? not sure.

No hassle while plugged-in, only happens on battery.

Dose anyone have same problem? I have a suspicious that Lenovo provided Intel graphic driver caused Flash GPU acceleration related problem, just guess.

 

You answered your own question... while you're on battery the processor is downclocked. It's present on ALL thinkpads. I just picked up a Lenovo 90 watt adapter so I can run my T410 at full speed without the battery, and it works.

 

But processor keep went no-response state. Dose that really happen all other thinkpads? If it is, that is big problem for Lenovo since other sandybridge laptops runs fine on same condition

 

Use something like CPU-Z or HWInfo64 to monitor your CPU clock.

 

You can check your bios settings to see what it's set at when on battery. I believe there's a "max battery" option that will force your computer to a low clock, there's also a "max performance" that's usually enabled when on AC. The default battery should be "balanced" or something of the sort.

 

If you are using the Power Manager, open and check which profile is applied. Under settings, change the CPU Performance to "Balanced" on battery (as mentioned above).

That should fix it.

 

I will try this. Thanks a lot.

It was on Balanced but thanks for info.

 

Ok guess I will pop in. As you have found power manager which btw you should update to current which I think is 3.59 model depending. If your on Battery and need better performance then change the profile from balanced to Max Performance. This will give you all the power you need as if it was plugged in but does eat the battery faster. I use 3 profiles, Max, powersouce opt, and max batt. You can also fine tune each profile to your needs as well. On battery I'm usually on powersource Opt and its fine tuned to give me almost what max does but it allows it down clock when idle. or under little load.



Thinkpads are not designed to run on power without the battery attached. Doing so no matter what profile you use usually ends up with your laptop at the lowest clock rate like "800".

ETA there's also a power setting for video card. Open up the vid card unilty,
make sure the refresh rate is on 60mhz not 50. The go to "power" and change it from balanced to max perfermonce. if you done all this and say you have everything on max and still have issues then somethings up.

ym