Comment 23 for bug 1433906

If you want to try yourself, this is what worked for me on a E550, Ubuntu 15.10:

uname -a
# check your current kernel version, then download the same version
# note, no root!
apt-get source linux-image-extra-4.2.0-19-generic
# install packages needed to build the kernel
sudo apt-get build-dep linux-image-extra-4.2.0-19-generic
sudo apt-get install git
cd linux-4.2.0
wget -O webcam.patch https://launchpadlibrarian.net/229627414/0001-uvcvideo-Acer-Integrated-Camera-5986-055a-add-UVC_QU.patch
git apply webcam.patch

you can now change the version in debian/changelog, adding "-webcam" or something of the like, which makes it easier to identify your kernel package.

DEB_BUILD_OPTIONS=parallel=4 AUTOBUILD=1 NOEXTRAS=1 fakeroot debian/rules binary-generic
# now wait until kernel is built, this takes some time
sudo dpkg -i ../linux-headers*.deb ../linux-image*.deb

Then, reboot.
You'll have to repeat this process if Ubuntu updates kernel.