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# Ubuntu 疑難排解筆記 # 20.04 LTS ## 安裝時 不要選擇third-party選項,N卡驅動會灌壞,到頭來還是要重灌N卡驅動 重灌N卡驅動步驟: ```=shell sudo apt-get autoremove nvidia* reboot ``` 這裡一定要apt-get 不能用apt ```=shell sudo add-apt-repository ppa:graphics-drivers/ppa sudo apt update sudo apt install ubuntu-drivers-common sudo apt install nvidia-driver-xxx ``` xxx為可以裝的版本號 每張卡不一樣 ```=shell reboot ``` ## 雙螢幕直立問題 雙螢幕時 第二個螢幕為直立 會變成奇怪的滑動模式 然後原本的螢幕有一部分滑鼠會到不了 Nvidia 驅動裡面 把underscan的選項隨便調直後再調回來 ![說明圖](https://i.imgur.com/wtM9uUK.png) ## 內建螢幕突然不能用 但是外接螢幕正常 可能是X11的檔案被改爛了 砍掉重來 ```=shell cd /etc/X11 sudo rm xorg.conf sudo touch xorg.conf ``` # 18.04 LTS ## MSI 筆電喇叭無聲 ```=shell vim admin:///usr/share/pulseaudio/alsa-mixer/paths/analog-output-speaker.conf ``` 將 ``` [Element Headphone] switch = off volume = off ``` 改為 ``` [Element Headphone] switch = off volume = merge ``` ## telegram 無法輸入中文 先檢查此目錄下是否有**telegramdesktop.desktop** 檔案 ```=shell cd ~/.local/share/applications/ ``` 若沒有的話先刪掉原本的 telegram 去 telegram 的[官方網站](https://telegram.org/)下載 **tar.xz** 檔回來解壓縮 回到剛剛的目錄會發現他出先了 進入設定檔 ```desktop [Desktop Entry] Version=1.0 Name=Telegram Desktop Comment=Official desktop version of Telegram messaging app TryExec=/home/zeng/下載/tele/Telegram/Telegram Exec=/home/zeng/下載/tele/Telegram/Telegram -- %u Icon=telegram Terminal=false StartupWMClass=TelegramDesktop Type=Application Categories=Chat;Network;InstantMessaging;Qt; MimeType=x-scheme-handler/tg; Keywords=tg;chat;im;messaging;messenger;sms;tdesktop; X-GNOME-UsesNotifications=true ``` 改為慣用的中文輸入法\(gcin、ibus、fcictx...\) ```desktop Exec=env QT_IM_MODULE=ibus /home/zeng/下載/tele/Telegram/Telegram -- %u ``` ## 強制關機造成無法開機的硬碟錯誤\( The root filesystem on /dev/sda1 requires a manual fsck \) ```=shell (initramfs) fsck /dev/sda1 ``` ## NetworkManager 造成的開機緩慢 可以在開機成功之後先用 ```=shell systemd-analyze blame ``` 查看每個項目所花的開機時間 ```=shell sudo vim /etc/systemd/system/network-online.target.wants/NetworkManager-wait-online.service ``` 將 timeout 修改成10或1 ```service ExecStart=/usr/bin/nm-online -s -q --timeout=30 ``` ## Ctrl + Alt + T 不會開啟終端機 可能是預設的terminal被取代掉了 將預設的terminal變回來 ```shell gsettings set org.gnome.desktop.default-applications.terminal exec 'gnome-terminal' ``` 或是直接在快捷鍵那邊重新用一個\(記得先把原本的取消掉\) |名稱|open terminal| |-|-| |指令|**gnome-terminal**| |快捷鍵|**Ctrl+Alt+T**| ## 自訂 gnome-shell icon icon放在/usr/share/themes/當前主題/gnome-shell/assets P.S. 不一定 要看 gnome-shell.css 裡面怎麼寫 ## BadTLP BadDLLP 開機錯誤 開機時grub選單```quiet splash```後面加上```pci=nommconf``` 成功後修改grub預設選單 ```=shell cd /etc/default/ sudo vim grub ``` 如果修改上面的檔案無效的話 ```=shell cd /boot/grub sudo vim grub.cfg ``` 自己重新開機確認 ## 快速編譯並在新視窗執行cpp檔案 在`~/.bashrc`裡面新增 ```=shell function docompile (){ local srcname="${1}" local objname="${1/.cpp/.out}" g++ -o "$objname" "$srcname" -Wall if [ $? -eq 0 ]; then gnome-terminal --working-directory="$PWD" -- bash -c "./${objname};bash" fi } alias gg='docompile' ``` gg可以設成自己要的別名 編譯時執行 ```=shell gg 檔案.cpp ``` 就可以了 ## restart gnome桌面後變得模糊 但是登出和重新開機後恢復正常 去nvidia-settings的Antialiasing Setting標籤 取消勾選Enable FXAA ![](https://i.imgur.com/sv3G17S.png)

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