My laptop model: Dell N4110
OS: Ubuntu 11.10
I have brought a USB keyboard and plugged into my laptop. But it does not work. Please suggest me what should I do?
Try plugging in a USB flash drive or USB mouse. If this is recognized, it means your USB ports are working well, and the most likely cause is that the keyboard is defective.
If the flash drive or mouse don't work, it may mean your USB ports aren't working correctly.
Try different ports on your computer to see if they all fail or only one of them does.