我想在 ubuntu 14.04 上尝试 snapd，但是存在一些依赖性问题。
显然 systemd 与我使用 HWE 包安装的一些 xorg/mesa 驱动程序存在冲突。
我删除了其中的一些，然后重试，成功了。现在我可以安装并使用 snap 了。
然后我尝试重新安装 HWE 包并得到以下结果：
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.
因此，安装 HWE 包会删除 systemd 和 snapd。
这里有 bug 吗？
答案1
感谢您试用 snapd。您观察到的行为是一个已知问题（请参阅https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1650389）几乎所有必需的更改都已完成，除了 xserver 更新（https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1619142) 目前正在等待 -proposed。我们预计很快就会传播到 -updates 包中。
要解决您的当前问题，您可能需要启用 trusty-proposed 并安装 xserver-xorg-core-lts-xenial。这将解决您的冲突/降级问题。
希望有所帮助。
更新：
和https://bugs.launchpad.net/ubuntu/+source/xorg-server-lts-xenial/+bug/1655724发布后，该问题就应该解决了。