3 ms·
I've noticed this before on another laptop. I believe it is EFI being picked up by the laptop amplifier, not from the touchpad, but actually from the graphics a
by jcrawfordor 10y ago
I've noticed this before on another laptop. I believe it is EFI being picked up by the laptop amplifier, not from the touchpad, but actually from the graphics adaptor or display panel controller. You'll likely actually get the noise any time you cause the whole screen to refresh for a long period.
- bitlevel 10y agoAlso sounds like it could be a ground loop (earthing). Somehow isolating the laptop's power from all others you may use (such as powered hubs, speakers, etc) by placing them on separate power feeds tends to help.