I've run into this problem on two different laptops now.
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https://bugs.launchpad.net/bugs/1362218
Title:
Touchpad stops working after switching user
To manage notifications about this
I did an temporary hack to overcome this problem. You can find it here:
http://askubuntu.com/a/527239
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https://bugs.launchpad.net/bugs/1362218
Title:
Touchpad stops working after
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: xserver-xorg-input-synaptics (Ubuntu)
Status: New = Confirmed
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Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: unity-settings-daemon (Ubuntu)
Status: New = Confirmed
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i am also affected. Someone else reported the same problem here:
http://askubuntu.com/questions/492393/ubuntu-14-04-mouse-pointer-cursor-
disappears-when-changing-user
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