Ade Malsasa Akbar contact
Senior author, Open Source enthusiast.
Tuesday, September 15, 2020 at 23:17

Lately there is a severely annoying trouble with my laptop using all GNU/Linux operating systems I have. Whether I use Ubuntu or others, this trouble stopped me from working for days. When booting I can use my keyboard just fine but when I come into login screen I failed to press any button. The only clue I have is that after doing suspend in login screen I can use keyboard for just a few seconds. My diagnosis comes down into my touchpad cable and finally the solution is to unplug that cable and the trouble is gone. I share my experience below hoping this helps somebody else out there.

(Imagine you can enter a livecd but cannot type anything nor press any key that's so frustrating of course)
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  • I cannot type anything at login screen in any of all GNU/Linux operating systems I have. No matter it is with or without swap, in hdd or in flash drive, actually installed or just LiveCD. This happened often and randomly.
  • I cannot enter BIOS as any of Esc, F2, and F12 buttons won't do anything.
  • I cannot login to my installed operating systems.
  • I cannot access tty consoles in all systems.
  • I don't know what is the cause it's so frustrating.


  • Keyboard works fine and is not physically damaged.  
  • Mouse works fine.
  • I can type just fine when in grub bootloader screen (all keys) just before I got blocked in the login screen afterward.
  • Several days before this I got my coffee spilled on my desk.


I removed touchpad cable from its housing and then now I can work with keyboard freely without the trouble. The only drawback is that now I cannot use my touchpad (it is already broken anyway). Of course I need to remove my laptop casing first.


I don't know except I suspect my touchpad interrupts my keyboard and the actual culprit is some coffee on the tip of touchpad cable probably caused unstable inputs to system.

This article is licensed under CC BY-SA 3.0.