Delay in mouse movement when using both the keyboard & mouse simultaneously

Question

I got a new Lenovo Flex 2 15 a couple of days ago, and the laptop is working pretty well. However, when I use the keyboard then quickly attempt to move the mouse with the touchpad, I am unable to move the mouse for at least half a second-or-so.

The exact same question exists here, but however it has no responses. I've already gone into the Windows 8.1 'PC Settings' and set the touchpad delay setting to 'No Delay (always on)':

I have looked in the Control Panel's Mouse settings and the settings for the touchpad, but nothing references to this behaviour.

How can I remove this delay so I can use both the keyboard and mouse at the same time? My laptop also is equipped with a touch-screen, so perhaps this has something to do with it?

Edit: Not a hardware issue, the Synaptic icon in the taskbar shows that the system recognises when I do, say, Ctrl+Z + move the touchpad; it's just that the actual mouse on the screen isn't moving.

Answer 1

On touchpads made by Synaptics, this is a "user-comfort" feature called PalmCheck. Touchpad operation is intentionally blocked when you are pressing keys on built-in keyboard.

You can disable the feature in control panel "Mouse" by minimizing PalmCheck sensitivity. Open mouse control panel and follow yellow highlights from top to bottom:

Answer 2

When changing the 'delay' setting to "No Delay (always on)" does not work, go to regedit and follow this registry path:

HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>PrecisionTouchPad

Then change "AAPThreshold" from 2 (or, whatever value is set) to 0.

You may have to reboot for changes to take effect.

The behavior may also be down to the drivers; so if the above did not work, ensure that they are up to date. Driver updates are usually found in Windows Update, Optional updates section.

Answer 3

This sounds like more of a hardware issue than a settings issue. Given the large amount of hits with "Flex 2 touchpad issues" you're likely going to experience this issue until you switch to using an external keyboard and mouse or replace the laptop. That said there are several things to try.

1. Try using the laptop while unplugged. Apparently it's possible that the battery can become overcharged and affect keyboard and touchpad functionality like this
2. Uninstall and reinstall the touchpad. It's possible that it could be conflicting with the keyboard interrupts.
3. Uninstall and reinstall the keyboard. Same thing as above though it's a toss-up as to which one could be causing the conflict.
4. Factory Reset via the "Novo Button" (see page 26 of the user's guide)
5. System Refresh with Windows 8.1

Hopefully one of these things work, worse comes to worse try to connect with Lenovo Support and go from there. Might be worthwhile to look into the return policy for where you made your purchase and try to get a different laptop should you continue to struggle.

Answer 4

It's really simple, and it's not an operating system issue - it's just PalmCheck being set to default. See this link for instructions on how to fix PalmCheck. Use Jeremy Gutjahr's reply; the Microsoft support woman has no idea what she's talking about.

http://answers.microsoft.com/en-us/windows/forum/windows_7-desktop/mouse-delay-between-typing-and-using-mouse/183a7da4-0ecf-4538-ae73-33d94ec0bb75?auth=1

Answer 5

The delay experience is due to discrepancies between the IO buffers and communication with your OS. When you press a key and simultaneously move the mouse that information has to be moved to keyboard's and mouse's buffer. Their controllers will then generate an interrupt and forward it to the operating system to pass the events, however it is overwhelmed by having the simultaneous interrupts from the mouse and the keyboard, thus experiencing the delays. This is an inevitable consequence of non concurrent process..Also try this in any OS and you will experience similar results.