My Lenovo has the same problem of the arrow shaking. I unplugged the power cord and it stopped shaking. So then I plugged the power cord in again and the arrow starting shaking. I switched power outlets and it still shook. So then for some strange reason I let one corner of the laptop rest on top of the back of my left hand (while the power cord was plugged in) and the shaking stopped. I tried to prop it up with a folded hand towel and then a piece of thick rubber instead of my hand, and the arrow shook. So perhaps the problem has something to do with vibration and electricity, short circuit, bad design in wiring?????
-- 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 : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
