Comment 68 for bug 1532746

Mmm that is strange.. This bios version ahould fix the problem.
Then you should try with i8042.dumbkbd on /etc/default/grub and then execute the command sudo update-grub
This parameter fix the problem but disables LED

PS: are you sure that the new version was correctly installed?
Check inside the bios menu what is the bios version.
On my notebook has fixed the problem, so i think that should work anywhere because probably the bios is always the same.