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I have a Samsung laptop running Windows 8.1 in front of me, which has the following symptoms:

  1. When holding down the Windows key, the start menu opens, closes, opens, closes at a high rate

  2. Holding down the ALT key causes the following events

    keyup    keyCode=17        which=17        charCode=0        
keydown  keyCode=18        which=18        charCode=0        
keyup    keyCode=17        which=17        charCode=0        
keydown  keyCode=18        which=18        charCode=0        
keyup    keyCode=17        which=17        charCode=0        
keydown  keyCode=18        which=18        charCode=0        
keyup    keyCode=17        which=17        charCode=0        
keydown  keyCode=18        which=18        charCode=0        
keyup    keyCode=17        which=17        charCode=0        
keydown  keyCode=18        which=18        charCode=0        
keyup    keyCode=17        which=17        charCode=0        
keydown  keyCode=18        which=18        charCode=0        
keyup    keyCode=17        which=17        charCode=0        
keydown  keyCode=18        which=18        charCode=0        
keyup    keyCode=17        which=17        charCode=0        
keydown  keyCode=18        which=18        charCode=0        
keyup    keyCode=17        which=17        charCode=0        
keyup    keyCode=18        which=18        charCode=0

    When trying this on other PC's, the output is (as expected)

    keydown  keyCode=18        which=18        charCode=0        
keydown  keyCode=18        which=18        charCode=0           
keydown  keyCode=18        which=18        charCode=0        
keydown  keyCode=18        which=18        charCode=0        
keydown  keyCode=18        which=18        charCode=0        
keyup    keyCode=18        which=18        charCode=0

    Note the "fake" key-up events.

  3. The Alt Gr key cannot be used to produce special symbols like €, @ and #. When using CTRL+ALT instead of Alt Gr, these symbols can be produced.
  4. Doing the same through an external USB keyboard causes the same issues.

All of these symptoms persist even when running in safe mode. How do I go about diagnosing the issue at hand?

Thomas
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Ives
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  • You ask the user what they spilled on the keyboard. Then you replace the keyboard. – Michael Hampton May 18 '18 at 23:37
  • It does the exact same thing on an external USB keyboard. The keypresses do work when sent over teamviewer. – Ives May 19 '18 at 08:17
  • Is [Sticky Keys feature](https://www.isunshare.com/windows-8/turn-on-and-turn-off-sticky-keys-on-windows-8-8.1.html) enabled and turned on? – JosefZ May 24 '18 at 19:48

0 Answers0