Keyboard – Fix Fast-Pressed Key Auto-Repeat on Ubuntu 14.04 LTS

When a key is pressed and released quickly, it will auto-repeat until the keyboard is touched again.

Lorem Ipsummmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm

It looks like the system receives the "keypress" signal alright, but the "keyrelease" seems to be lost on fast maneuvers.

The issue is easy to recreate. If I "brush" the keyboard (don't know how else to describe pressing a key for the slightest moment), then the letter appears normally, but after the prescribed delay, it will auto-repeat as if the key was kept pressed. In my case the auto-repeat delay is about half a second. This issue exists for all of the keyboard keys, including up/down arrows, backspace, etc. It does it consistently in all Ubuntu applications.

I have a Dell Precision M4800. Dual boot with Windows 8.1. The keyboard works fine in Windows.

The laptop is new. So far this is the only issue with this install. Everything else appear to be working well. I am familiar with Ubuntu 14.04 (I have it on 3 other laptops). This is the first time I've seen this issue.

I have an external USB keyboard and it doesn't have this issue. However it is so crude, and the keys so deep, that I cannot really recreate the same "brushing" effect.

All the "Universal Access" options are off.

EDIT 1:
The following is from a XEV. KeyPress and KeyRelease repeats over and over:

KeyPress event, serial 37, synthetic NO, window 0x5000001,
root 0xc4, subw 0x0, time 8211573, (263,232), root:(304,284),
state 0x0, keycode 57 (keysym 0x6e, n), same_screen YES,
XLookupString gives 1 bytes: (6e) "n"
XmbLookupString gives 1 bytes: (6e) "n"
XFilterEvent returns: False

KeyRelease event, serial 37, synthetic NO, window 0x5000001,
root 0xc4, subw 0x0, time 8211591, (263,232), root:(304,284),
state 0x0, keycode 57 (keysym 0x6e, n), same_screen YES,
XLookupString gives 1 bytes: (6e) "n"
XFilterEvent returns: False

EDIT 2:
Comparing two XEV sessions, one with the issue and one with a voluntary key auto-repeat, both are virtually identical except for the "KeymapNotify event".

With the issue:

KeymapNotify event, serial 29, synthetic NO, window 0x0,
keys:  4294967224 0   0   0   16  0   0   0   0   0   0   0   0   0   0   0   
       0   0   0   0   0   0   0   0   0   0   0   0   0   0   0   0   

Normal auto-repeat:

KeymapNotify event, serial 29, synthetic NO, window 0x0,
keys:  0   0   0   0   16  0   0   0   0   0   0   0   0   0   0   0   
       0   0   0   0   0   0   0   0   0   0   0   0   0   0   0   0