I don't know, is this is helpfull, but this bug affects me too. But, i have two diferent adapters, one with earthing ( i hope, this is the correct word, one with 3 "cables" go to wall) and one without ( only 2 cables, i buy it for have to adapters, one for home use, one for traveling ). With one, that is with earthing, this problem don't appear, but with that one without, problem ocurs. One friend of me told me, that there might be problem with touchpad and not earthing adapter.
But, here is another thing. When i plug in adapter which brings problem ( that without earthing ), problem occurs. But, when i connect my USB hub which has own adapter, shaking is smaller, but when i plug in my HDMI monitor, which has cable with earthing, problem totaly disappeared. So, i hope, i was helpfull somehow... But if I'm right, i don't know, what can software do for removing this problem. PS.: sorry, if I broke some rules of this bug reporting, but i never do this before and i just wan't to help. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xserver-xorg-input-synaptics in Ubuntu. https://bugs.launchpad.net/bugs/1028617 Title: Cursor shakes violently when connected to power source - makes touchpad cursor unusable Status in “xserver-xorg-input-synaptics” package in Ubuntu: Confirmed Bug description: Using Ubuntu 12.04, 64-bit version, installed on Lenovo X220 laptop. Fresh "default" install and settings configuration. When the laptop is plugged into a power source, the touchpad's onscreen cursor (the white arrow that shows position) shakes excessively when trying to use the touchpad to control the cursor. The shaking is so bad that it essentially makes the touchpad unusable. For example, trying to click the minimize button in a window's upper left corner will routinely result in accidentally clicking the close button because of the cursor's shaking. The problem is NOT present when Ubuntu is running on battery. But this means I can never have Ubuntu plugged in and charging while I use it, which is very inconvenient at times. I'm using the power block and cable that came with the X220. But I also tried using a larger power block and cable that came with another Lenovo model - this power block is approved for use with the X220 and is sold on the Lenovo website as an X220 accessory. But this larger power block did not improve the shaking behavior either. I have no special settings enabled for the touchpad. But changing the settings has no effect on this shaking behavior either. I attached a screenshot of my Touchpad settings [please excuse the HUD's presence - I cannot get the HUD to NOT appear when I press ALT+PrtSc to take a screenshot (I guess this is another bug)]. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input-synaptics/+bug/1028617/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
