我刚刚购买了一个 thinkpad，它有 synaptics 输入设备，但 ubuntu 18.4 没有附带 synaptics 触摸板驱动程序。我正在尝试实施给出的解决方案这里但跑步sudo apt-get install xserver-xorg-input-synaptics会导致：
Reading package lists... Done
Building dependency tree
Reading state information... Done
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:
xserver-xorg-input-synaptics : Depends: xserver-xorg-core (>= 2:1.18.99.901)
E: Unable to correct problems, you have held broken packages.
apt 策略 xserver-xorg-input-synaptics xserver-xorg-core 输出：
xserver-xorg-input-synaptics:
Installed: (none)
Candidate: 1.9.0-1ubuntu1
Version table:
1.9.0-1ubuntu1 500
500 http://in.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
xserver-xorg-core:
Installed: (none)
Candidate: 2:1.19.6-1ubuntu4.3
Version table:
2:1.19.6-1ubuntu4.3 500
500 http://in.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
2:1.19.6-1ubuntu4.2 500
500 http://security.ubuntu.com/ubuntu bionic-security/main amd64 Packages
2:1.19.6-1ubuntu4 500
500 http://in.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
我努力了这个解决方案。但这并不能解决我的问题。有人可以帮助我吗，我真的很挣扎于这个不稳定的触摸板