你好，
我有 xubuntu 18.04，这是我的系统的详细信息：
$ uname -a
Linux xubuntu1 4.15.0-22-generic #24-Ubuntu SMP Wed May 16 12:15:17 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04 LTS
Release: 18.04
Codename: bionic
目前，我有 nouveau 驱动程序，我正尝试在“软件和更新 - 附加驱动程序”中更改为 nvidia 驱动程序，当我选择 nvidia 选项，然后单击“应用更改”时，什么都没有发生。我需要执行额外步骤来应用此更改吗？？我已经从 nividia 主页下载了 nividia 驱动程序并尝试安装但没有成功。有人能帮帮我吗？我正在尝试更改图形驱动程序，因为我遇到了 Windows 冻结的问题，我认为图形驱动程序是问题所在。非常感谢。PDS。这是 sudo apt install nvidia-304 的输出：
$ sudo apt install nvidia-304
[sudo] password for xubuntu:
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:
libgtk-3-0 : Depends: libwayland-egl1-mesa (>= 10.0.2) but it is not going to be installed or
libwayland-egl1
nvidia-304 : Depends: xorg-video-abi-11 but it is not installable or
xorg-video-abi-12 but it is not installable or
xorg-video-abi-13 but it is not installable or
xorg-video-abi-14 but it is not installable or
xorg-video-abi-15 but it is not installable or
xorg-video-abi-18 but it is not installable or
xorg-video-abi-19 but it is not installable or
xorg-video-abi-20 but it is not installable or
xorg-video-abi-23
Depends: xserver-xorg-core but it is not going to be installed
E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.