Keys malfunctioning - ctrl and shift seem to be pressed when they aren't, or don't work when pressed

I've the same problem on HP Pavilion 15 ab062nl. CPU AMD A10 8700p, GPU radeon r6 + radeon r7 m360, RAM: 8GB DDR3.

Try pressing only Left_SHIFT Key. On my notebook this fixes the problem for a while

problem with SHIFT, CTRL and ALT button with integrated keyboard

I've also opened a bug on launchpad

You can add yourself as affected or create a new bug if you think yours is different.

In my opinion it's a problem of compatibility with these HP Keyboards.

Ok, so after some time of testing and with the help of @Dea1993 and the guys on the Launchpad bug thread. This is how I fix it.

Edit the line GRUB_CMDLINE_LINUX_DEFAULT on /etc/default/grub to:
```
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i8042.dumbkbd=1"
```
Update grub:
```
$ sudo update-grub
```
Reboot

Although this causes the CAPS LOCK keyboard led not to blink (but this is, in fact, the expected behavior).

For the record, these are the options I found regarding the i8042 controller:

i8042.direct - Put keyboard port into non-translated mode
i8042.dumbkbd - Pretend that controller can only read data from keyboard and cannot control its state (Don't attempt to blink the leds)
i8042.noaux - Don't check for auxiliary (== mouse) port
i8042.nokbd - Don't check/create keyboard port
i8042.noloop - Disable the AUX Loopback command while probing for the AUX port
i8042.nomux - Don't check presence of an active multiplexing controller
i8042.nopnp - Don't use ACPIPnP / PnPBIOS to discover KBD/AUX controllers
i8042.reset - Reset the controller during init and cleanup
i8042.unlock - Unlock (ignore) the keylock

i've finally solved the problem updating BIOS

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