I wanted to try snapd on ubuntu 14.04, but there was some dependency problems.
Apparently systemd conflicts with some xorg/mesa drivers I have installed with the HWE packages.
I removed some of them and tried again and it worked. Now I'm able to install and use snaps.
Then I tried to reinstall the HWE packages and get this:
chestrada@estacion17:~$ sudo apt-get install --install-recommends linux-generic-lts-xenial xserver-xorg-core-lts-xenial xserver-xorg-lts-xenial xserver-xorg-video-all-lts-xenial xserver-xorg-input-all-lts-xenial libwayland-egl1-mesa-lts-xenial libgl1-mesa-glx-lts-xenial libgl1-mesa-glx-lts-xenial:i386 libglapi-mesa-lts-xenial:i386
Reading package lists... Done
Building dependency tree
Reading state information... Done
linux-generic-lts-xenial is already the newest version.
The following packages were automatically installed and are no longer required:
snap-confine ubuntu-core-launcher
Use 'apt-get autoremove' to remove them.
The following extra packages will be installed:
libdrm-amdgpu1 libdrm-amdgpu1:i386 libdrm-intel1:i386 libdrm-nouveau2:i386
libdrm-radeon1:i386 libedit2:i386 libegl1-mesa-lts-xenial libelf1:i386
libepoxy0 libevdev2 libgbm1-lts-xenial libgl1-mesa-dri-lts-xenial
libgl1-mesa-dri-lts-xenial:i386 libglapi-mesa-lts-xenial
libgles1-mesa-lts-xenial libgles2-mesa-lts-xenial libllvm3.8v4
libllvm3.8v4:i386 libpciaccess0:i386 libtxc-dxtn-s2tc0:i386
libxatracker2-lts-xenial xserver-xorg-input-evdev-lts-xenial
xserver-xorg-input-synaptics-lts-xenial
xserver-xorg-input-vmmouse-lts-xenial xserver-xorg-input-wacom-lts-xenial
xserver-xorg-video-amdgpu-lts-xenial xserver-xorg-video-ati-lts-xenial
xserver-xorg-video-cirrus-lts-xenial xserver-xorg-video-fbdev-lts-xenial
xserver-xorg-video-intel-lts-xenial xserver-xorg-video-mach64-lts-xenial
xserver-xorg-video-mga-lts-xenial xserver-xorg-video-neomagic-lts-xenial
xserver-xorg-video-nouveau-lts-xenial
xserver-xorg-video-openchrome-lts-xenial xserver-xorg-video-qxl-lts-xenial
xserver-xorg-video-r128-lts-xenial xserver-xorg-video-radeon-lts-xenial
xserver-xorg-video-savage-lts-xenial
xserver-xorg-video-siliconmotion-lts-xenial
xserver-xorg-video-sisusb-lts-xenial xserver-xorg-video-tdfx-lts-xenial
xserver-xorg-video-trident-lts-xenial xserver-xorg-video-vesa-lts-xenial
xserver-xorg-video-vmware-lts-xenial
Suggested packages:
xfonts-100dpi xfonts-75dpi gpointing-device-settings touchfreeze
firmware-amd-graphics firmware-linux
The following packages will be REMOVED:
fglrx-amdcccle-updates fglrx-updates fglrx-updates-core libegl1-mesa
libegl1-mesa-drivers libgl1-mesa-dri libgl1-mesa-glx libgl1-mesa-glx:i386
libglapi-mesa libglapi-mesa:i386 libgles2-mesa libopenvg1-mesa
libwayland-egl1-mesa snapd systemd xserver-xorg xserver-xorg-core
xserver-xorg-input-all xserver-xorg-input-evdev xserver-xorg-input-mouse
xserver-xorg-input-synaptics xserver-xorg-input-vmmouse
xserver-xorg-input-wacom xserver-xorg-video-cirrus xserver-xorg-video-fbdev
xserver-xorg-video-intel xserver-xorg-video-mach64 xserver-xorg-video-mga
xserver-xorg-video-modesetting xserver-xorg-video-neomagic
xserver-xorg-video-nouveau xserver-xorg-video-openchrome
xserver-xorg-video-qxl xserver-xorg-video-r128 xserver-xorg-video-radeon
xserver-xorg-video-s3 xserver-xorg-video-savage
xserver-xorg-video-siliconmotion xserver-xorg-video-sis
xserver-xorg-video-sisusb xserver-xorg-video-tdfx xserver-xorg-video-trident
xserver-xorg-video-vesa
The following NEW packages will be installed:
libdrm-amdgpu1 libdrm-amdgpu1:i386 libdrm-intel1:i386 libdrm-nouveau2:i386
libdrm-radeon1:i386 libedit2:i386 libegl1-mesa-lts-xenial libelf1:i386
libepoxy0 libevdev2 libgbm1-lts-xenial libgl1-mesa-dri-lts-xenial
libgl1-mesa-dri-lts-xenial:i386 libgl1-mesa-glx-lts-xenial
libgl1-mesa-glx-lts-xenial:i386 libglapi-mesa-lts-xenial
libglapi-mesa-lts-xenial:i386 libgles1-mesa-lts-xenial
libgles2-mesa-lts-xenial libllvm3.8v4 libllvm3.8v4:i386 libpciaccess0:i386
libtxc-dxtn-s2tc0:i386 libwayland-egl1-mesa-lts-xenial
libxatracker2-lts-xenial xserver-xorg-core-lts-xenial
xserver-xorg-input-all-lts-xenial xserver-xorg-input-evdev-lts-xenial
xserver-xorg-input-synaptics-lts-xenial
xserver-xorg-input-vmmouse-lts-xenial xserver-xorg-input-wacom-lts-xenial
xserver-xorg-lts-xenial xserver-xorg-video-all-lts-xenial
xserver-xorg-video-amdgpu-lts-xenial xserver-xorg-video-ati-lts-xenial
xserver-xorg-video-cirrus-lts-xenial xserver-xorg-video-fbdev-lts-xenial
xserver-xorg-video-intel-lts-xenial xserver-xorg-video-mach64-lts-xenial
xserver-xorg-video-mga-lts-xenial xserver-xorg-video-neomagic-lts-xenial
xserver-xorg-video-nouveau-lts-xenial
xserver-xorg-video-openchrome-lts-xenial xserver-xorg-video-qxl-lts-xenial
xserver-xorg-video-r128-lts-xenial xserver-xorg-video-radeon-lts-xenial
xserver-xorg-video-savage-lts-xenial
xserver-xorg-video-siliconmotion-lts-xenial
xserver-xorg-video-sisusb-lts-xenial xserver-xorg-video-tdfx-lts-xenial
xserver-xorg-video-trident-lts-xenial xserver-xorg-video-vesa-lts-xenial
xserver-xorg-video-vmware-lts-xenial
0 upgraded, 53 newly installed, 43 to remove and 0 not upgraded.
Need to get 34.0 MB of archives.
After this operation, 406 MB disk space will be freed.
Do you want to continue? [Y/n] n
Abort.
So, installing the HWE packages removes systemd and snapd.
Is there a bug here?