Touchpad does not respond when I am holding key on the keyboard

Notice that the Space, a, and b keys repeat. Holding the a key will send many a characters as input. Shift, Ctrl, and Alt do not repeat. The system detects them as being pressed and released.

It sounds like your system is setup to turn off the touchpad while typing. It considers pressing the a key as typing. It may consider holding the Ctrl key as an option for the touchpad, e.g. hold Ctrl+touchpad click.

Consider going to your touchpad configuration. Looking for an option where the touchpad turns off while typing. I haven't worked with your specific model, or an HP, but my ThinkPads have had the option.

Found the answer on a different site.

Start -> Mouse (search) -> Device Settings -> Settings (select Synaptics LuxPad) -> Palmcheck-enhanced ACM -> Palmcheck -> Adjust the slider to Off. This works perfectly on all HP ProBook models.

I have experienced the same problem. If the touchpad you are using is elantech, this works. In run dialog type regedit.

Go to

HKEY_CURRENT_USER -> Software -> Elantech ->Other settings.

Check for Options

DisableWhenType_Enable and set the value to 1.

This works for maximum cases and if doesn't check DisableWhenType_AllArea and set its value to 1.