問題

ubuntu18.04下nvidia-settings無法保存設置

解決方法

打開終端執行

nvidia-settings

點擊 Save to X Configuration File 提示 Unable to open X config file ‘/etc/X11/xorg.conf’ for writing

看終端輸出

Package xorg-server was not found in the pkg-config search path. Perhaps you should add the directory containing `xorg-server.pc' to the PKG_CONFIG_PATH environment variable No package 'xorg-server' found Package xorg-server was not found in the pkg-config search path. Perhaps you should add the directory containing `xorg-server.pc' to the PKG_CONFIG_PATH environment variable No package 'xorg-server' found Error accessing /usr/share/screen-resolution-extra/nvidia-polkit: No such file or directoryERROR: Unable to open X config file '/etc/X11/xorg.conf' for writing.

發現沒有 /usr/share/screen-resolution-extra/nvidia-polkit 文件

進入目錄cd /usr/share/screen-resolution-extra && ls
發現存在nvidia-polkit.py
于是為其創建軟鏈接，并賦予可執行權限

sudo ln -s nvidia-polkit.py nvidia-polkit sudo chmod +x nvidia-polkit

此時，執行Save to X Configuration File，若終端輸出

Package xorg-server was not found in the pkg-config search path. Perhaps you should add the directory containing `xorg-server.pc' to the PKG_CONFIG_PATH environment variable No package 'xorg-server' found Traceback (most recent call last):File "/usr/share/screen-resolution-extra/nvidia-polkit", line 20, in <module>import sys, dbus, logging, os, re ImportError: No module named dbusERROR: Unable to open X config file '/etc/X11/xorg.conf' for writing.

可能是因為pyhon版本問題
切換系統默認python版本至python3

sudo update-alternatives --install /usr/bin/python python /usr/bin/python2 100 sudo update-alternatives --install /usr/bin/python python /usr/bin/python3 150 sudo update-alternatives --display python

可看到當前選擇python3

python - auto modelink best version is /usr/bin/python3link currently points to /usr/bin/python3link python is /usr/bin/python /usr/bin/python2 - priority 100 /usr/bin/python3 - priority 150

此時，Save to X Configuration File應執行成功

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