U300s mouse cursor is jumping around when charging

[skool4boyz2]

Hi everyone. I am quite new to lenovo.

I just bought U300s ideapad last week.

Straight to the point: My main problem is that

when i am charging the laptop, the mouse cursor

skipping around and it is pretty annoying. I can't even click

the right icon. The movement is here and there.

I have had contacted the customer service via chatting,

1) suggested to update the synaptics driver (Done)

2) Reinstall win 7 os (Done)

3) The guy even update the BIOS for me (he virtually control my laptop

and update for me) (Done)

Can somebody help me out. Experts or anybody experienced the same

situation before. Please help me out.

Thank you

p.s -when my laptop is fully charge, it works fine

[tanujhanda Retired Partner]

Hello skool4boyz2 and welcome to community,

Kindly check connecting power adapter with different min or if you have another power adapter then check with it,

Best Regards,

Tanuj

[skool4boyz2]

thanks for the reply,

I just wondering if existing charger can be replaced by the new one. Is it covered in the warranty? I use the original charger and

the problem keep on coming. 

[fiesta]

With all the drivers you reinstaled, did you update the energy management driver as well?

might just do the trick, especially after BIOSUpdate.

[lead_org Microsoft MVP Contributor]

yes, this problem you are experiencing is most likely due to the fact that during when your battery charges, your CPU speed is throttled back.

This throttling problem is a known problem.

Try the latest BIOS firmware update, see whether it addresses the issue. 

[skool4boyz2]

Hi guys thanks for the reply.

I have had check the BIOS. It is updated.

I have also installed latest power management.

Nothing change.

Any thought?

Thanks

[Zehnsteine]

Hi Boyz,

it very much looks like the charger is to weak to power the U300s machine and charge the battery simultaneously,

next step in troubleshooting should be to temporarily connect another more powerful compatible charger and see what happen then.

Can you go visit a computer vendor nearby and pester him to make that test for you?

And sure your existing original Lenovo charger is covered by warranty!

Just a thought... Zehn

[lead_org Microsoft MVP Contributor]

Install HWinfo32, check whether your CPU is throttling (put your machine under full performance) when your laptop is charging.

[skool4boyz2]

Hi guys, these are snapshots when using  HWinfo32.

This is before 

http://s1245.photobucket.com/albums/gg589/skool4boyz2/?action=view&current=beforecharging.png

This is after

http://s1245.photobucket.com/albums/gg589/skool4boyz2/?action=view&current=after.png

Anythought ? 

Thx

[lead_org Microsoft MVP Contributor]

before as in when the battery is charging? and after as in when the battery is finishing charging?