nVidia graphics driver

  

  Vào teminal gõ lệnh:

sudo apt-get install nvidia-glx-new (gói driver NVIDIA)

Reboot lại. Nếu sau khi reboot mà máy hiển thị sai refresh rate (màn hình nhòe, nháy):
Vào Virtual Console (nhấn Ctrl + Alt + F1)
nhập user & pass
sudo nano /etc/X11/xorg.conf

Trong section "screen" tìm dòng nào để cấu hình refresh rate, giới hạn lại. Như máy mình giới hạn đến 75 Hertz

 

 

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Note that installing the nVidia driver will fix some screen resolution problems.

1. Go to the System > Administration menu, click on Hardware Drivers, and then enable the nVidia Graphics Driver checkbox in the Device Driver tree. If you need to set up multiple monitors, go to step 3. Otherwise, just restart the computer and you're done!
2. (alternative) If the previous step didn't work, you can manually install and enable the nVidia driver:

   sudo apt-get install nvidia-glx-new
   sudo nvidia-xconfig
   

   Note: If you have a GeForce4 video card, you may need to use nvidia-glx instead of nvidia-glx-new. And if you have a very old card, like a TNT, you may need to use nvidia-glx-legacy instead.
3. Power off your computer, connect all monitors, and then turn the computer back on. When you get to the GRUB menu, select the option to boot into Ubuntu in recovery mode. You will eventually get to a menu where you can choose to drop into a root shell. Once you're at the root shell prompt, enable the nVidia driver:

   sudo nvidia-xconfig --separate-x-screens
   

   Finally, exit the root shell by pressing CTRL+D,  and choose the Resume normal boot option.
4. You can further modify screen resolution, dual monitor setup, Xinerama, etc. using the nvidia-settings package:

   sudo apt-get install nvidia-settings
   sudo nvidia-settings
   

   You can change the settings in the "X Server Display Configuration" section and then click the "Save to X Configuration" button and save the file as /etc/X11/xorg.conf.