这ubuntu 文档告诉我我可以通过运行以下命令将我的桌面升级到 14.04.2：
sudo apt-get install --install-recommends \
linux-generic-lts-vivid \
xserver-xorg-core-lts-vivid \
xserver-xorg-lts-vivid \
xserver-xorg-video-all-lts-vivid \
xserver-xorg-input-all-lts-vivid \
libwayland-egl1-mesa-lts-vivid
然而，当我这样做时，我遇到了包装问题：
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies.
empathy : Depends: libclutter-gst-2.0-0 (>= 0.10.0) but it is not going to be installed
Depends: libcogl15 (>= 1.15.8) but it is not going to be installed
libcheese-gtk23 : Depends: libcogl15 (>= 1.15.8) but it is not going to be installed
libcheese7 : Depends: libclutter-gst-2.0-0 (>= 0.10.0) but it is not going to be installed
Depends: gstreamer1.0-clutter but it is not going to be installed
libclutter-1.0-0 : Depends: libcogl-pango15 (>= 1.15.8) but it is not going to be installed
Depends: libcogl15 (>= 1.15.8) but it is not going to be installed
libclutter-gtk-1.0-0 : Depends: libcogl15 (>= 1.15.8) but it is not going to be installed
libwayland-egl1-mesa-lts-vivid : Depends: libegl1-mesa-lts-vivid (= 10.5.2-0ubuntu1~trusty1) but it is not going to be installed
Conflicts: xorg-renamed-package-lts-utopic
xserver-xorg-core-lts-vivid : Depends: libgbm1-lts-vivid (>= 8.1~0) but it is not going to be installed
Recommends: libgl1-mesa-dri-lts-vivid (>= 7.10.2-4) but it is not going to be installed
Conflicts: xorg-renamed-package-lts-utopic
xserver-xorg-input-all-lts-vivid : Depends: xserver-xorg-input-evdev-lts-vivid but it is not going to be installed
Depends: xserver-xorg-input-vmmouse-lts-vivid but it is not going to be installed
Depends: xserver-xorg-input-synaptics-lts-vivid but it is not going to be installed
Depends: xserver-xorg-input-wacom-lts-vivid but it is not going to be installed
xserver-xorg-lts-vivid : Depends: xserver-xorg-input-evdev-lts-vivid but it is not going to be installed
Recommends: libgl1-mesa-dri-lts-vivid but it is not going to be installed
Recommends: libgl1-mesa-glx-lts-vivid but it is not going to be installed
Recommends: libegl1-mesa-lts-vivid but it is not going to be installed
Recommends: libegl1-mesa-drivers-lts-vivid but it is not installable
Recommends: libgbm1-lts-vivid but it is not going to be installed
Recommends: libgles2-mesa-lts-vivid but it is not going to be installed
Recommends: libgles1-mesa-lts-vivid but it is not going to be installed
Conflicts: libegl1-mesa (>= 0~)
Conflicts: libgl1-mesa-dri (>= 0~)
Conflicts: libgl1-mesa-dri:i386 (>= 0~)
Conflicts: libgl1-mesa-glx (>= 0~)
Conflicts: libgl1-mesa-glx:i386 (>= 0~)
Conflicts: libglapi-mesa (>= 0~)
Conflicts: libglapi-mesa:i386 (>= 0~)
Conflicts: libgles1-mesa (>= 0~)
Conflicts: libgles2-mesa (>= 0~)
Conflicts: xorg-renamed-package-lts-utopic
xserver-xorg-video-all-lts-vivid : Depends: xserver-xorg-video-ati-lts-vivid but it is not going to be installed
Depends: xserver-xorg-video-cirrus-lts-vivid but it is not going to be installed
Depends: xserver-xorg-video-fbdev-lts-vivid but it is not going to be installed
Depends: xserver-xorg-video-intel-lts-vivid but it is not going to be installed
Depends: xserver-xorg-video-mga-lts-vivid but it is not going to be installed
Depends: xserver-xorg-video-neomagic-lts-vivid but it is not going to be installed
Depends: xserver-xorg-video-nouveau-lts-vivid but it is not going to be installed
Depends: xserver-xorg-video-openchrome-lts-vivid but it is not going to be installed
Depends: xserver-xorg-video-savage-lts-vivid but it is not going to be installed
Depends: xserver-xorg-video-siliconmotion-lts-vivid but it is not going to be installed
Depends: xserver-xorg-video-sisusb-lts-vivid but it is not going to be installed
Depends: xserver-xorg-video-tdfx-lts-vivid but it is not going to be installed
Depends: xserver-xorg-video-trident-lts-vivid but it is not going to be installed
Depends: xserver-xorg-video-vesa-lts-vivid but it is not going to be installed
Depends: xserver-xorg-video-vmware-lts-vivid but it is not going to be installed
E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.
我可以运行命令来安装内核，但是有没有升级 xserver/mesa 包的解决方案？
答案1
正确的命令是
sudo apt-get install linux-generic-lts-vivid xserver-xorg-lts-vivid libqt5gui5 \
libgles1-mesa-lts-vivid libgles2-mesa-lts-vivid libgl1-mesa-glx-lts-vivid \
libgl1-mesa-glx-lts-vivid:i386 libglapi-mesa-lts-vivid:i386