What to do if the touchpad does not respond well to touch?

Question

linux

There is a DELL Latitude e6400. Because iron is very modest - I use light Linux. But there is a sadness-trouble with the touchpad. He, for no apparent reason, does not clearly respond to touch. Those. you spend once on it - the cursor stands still, the MB will move a little. You spend the second time - it goes almost as it should. There is no clearly defined systematics in this inhibition. Everything happens unexpectedly. Although I noticed that without recharging such jambs are almost never observed, but as soon as the laptop is put on charge, it becomes significantly uncomfortable.
I have no idea what it could be. Before that, there was an E6410, there were no such jambs. ALPS touchpad. The systems will define it as a touchpad. Changing the distribution does not help.
Help kind (and maybe not so) people with advice, because living is so inconvenient.

Answer 1

Replace the touch, insulate the touch, take it in for repair or return it under warranty. Unlikely: update firewood or calibrate when charging is connected (I don’t know if the capacity is measured during calibration, so it’s just an assumption). I would personally choose the item "to hand over under warranty".

Answer 2

Theoretically, high-quality grounding in the outlet can help you.

Answer 3

We noticed on this model that when charging, voltage is applied to the case. Just slide your finger across the cap when it's charging and when it's not.
True, it did not cause such effects with the touchpad as you have.

Answer 4

Try to find another PSU and check with it or service yours.
This problem arises due to noise (interference) along the power lines, noise can be given both by the PSU itself (as a rule, the electrolyte has dried up at the output), and due to problems with electrolytes in the converters in the laptop itself.
One way or another, this problem is easily diagnosed with an oscilloscope or a blunt replacement of all electrolytes :)