Same here with an Acer ES1-131. The touchpad works fine with 3.19.0-51 (14.04 LTS), stopped working after the update to Kernel 3.19.0-56.
Same here with an Acer ES1-131. The touchpad works fine with 3.19.0-51 (14.04 LTS), stopped working after the update to Kernel 3.19.0-56.