How to fix error system is running in low graphics mode?

How to fix error system is running in low graphics mode?

While booting to Ubuntu desktop system get stuck, and the error message generated is - The system is running in low graphics mode. Graphic card and input device does not get detected correctly. Subsequently to solve, it advises to configure it yourself.
引導到 Ubuntu 桌面系統時卡住，並且生成的錯誤消息是 - The system is running in low graphics mode。圖形卡和輸入設備未正確檢測。Subsequently to solve, it advises to configure it yourself.

stick [stɪk]：vt. 刺，戳，伸出，粘貼 vi. 堅持，伸出，粘住 n. 棍，手杖，呆頭呆腦的人
subsequently [ˈsʌbsɪkwəntli]：adv. 隨後，其後，後來

When you click on OK it leads to next screen, where you get an option to reconfigure graphics. Restore it to default setting or restore from any of the backed up settings.
當您單擊 OK 時，將轉到下一個屏幕，您可以在其中選擇重新配置圖形。將其還原爲默認設置，或從任何備份設置還原。

In order to do that follow the instructions as mention in the screen shot above and reboot the machine. In case, if this does not fix the low graphic issue then you can follow below steps.
爲此，請按照上述屏幕快照中的說明進行操作，然後重新啓動計算機。如果這不能解決 low graphic 問題，則可以按照以下步驟操作。

• Restart the machine
• Once the grub menu loaded choose Advanced options for ubuntu.

It will take you to the next screen, where you will see different options. Choose dpkg Repair broken packages. It will upgrade the system and repair broken packages.
它將帶您到下一個屏幕，您將在其中看到不同的選項。選擇 dpkg Repair broken packages。它將升級系統並修復損壞的軟件包。

Even after doing this if you don’t get success then follow below instructions to fix this problem.
即使這樣做仍然沒有成功，也請按照以下說明解決此問題。

• Press key Ctrl + Alt + F4 to go to shell terminal (In some system, need to press Ctrl + Alt + F1)
• Run below commands to upgrade system and fix the broken packages.

sudo apt-get update

After this just replace update with upgrade and run. Once that get completed replace upgrade with dist-upgrade and run. After that restart the system and check if all goes well.
之後，只需將 update 替換爲 upgrade 即可運行。一旦完成，用 dist-upgrade 替換升級並運行。之後，重新啓動系統並檢查是否一切正常。

sudo reboot

• If this does not fix the issue then there might be problem with login manager - lightdm. Therefore, try removing this and then install it again. In order to do that run below commands.

sudo apt-get purge lightdm
sudo apt-get install lightdm

I have tried this and this has fixed my low graphic issue. Rather than using lightdm you can also use any other login manager like gdm3, kdm etc.
我已經嘗試過了，這已經解決了我的 low graphic 問題。除了使用 lightdm，您還可以使用其他任何登錄管理器，例如 gdm3，kdm 等。