I tried the information of the Google+ community of elementary OS, it worked:
https://plus.google.com/b/111659895494557099209/106882842682420321979/posts/DkdeBjMSAT3
sudo mkdir /etc/X11/xorg.conf.d
sudo (editor) /etc/X11/xorg.conf.d/20-intel.conf
Section "Device"
Identifier "Intel Graphics"
Driver "intel"
Option "AccelMethod" "uxa"
EndSection
It worked even Xubuntu and Lubuntu.
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https://bugs.launchpad.net/bugs/1568604
Title:
Mouse cursor lost when unlocking with Intel graphics
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