Linux: Precision 7510 - mouse button/touchpad issue

Hi, I am running a dual boot environment with Win10 and  KDE Neon and so far things work pretty well. Still trying to find my way around Linux though.

Reason for my post is that I have really strange issue with one of my touchpad buttons. My 7510 has 2 sets of mouse buttons, one set below the touchpad and one above. The 3 buttons below the touchpad work without a problem. The upper left mouse button however, allows me to click and select, but not to drag items? In other words, the actual click works but when I hold the button and use the touchpad to move an item nothing happens? The lower left button works without a problem.

I am pretty sure this is not a hardware issue with the button as the this mouse button works as expected when I boot Windows.

So if this is a driver/configuration issue, anyone got an idea where to look, what to do?

Given this is probably my 5th Dell laptop and I have always used the upper left mouse button I really got used to work this way,  hence this behavior is driving me mad :-/

Any help or tip in terms of where to look is appreciated!

I saw that others with similar issues posted the output of xinput, so here it is for my machine:

 xinput                                                                                                                                                      
⎡ Virtual core pointer                          id=2    [master pointer  (3)]                                                                                                  
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]                                                                                                  
⎜   ↳ AlpsPS/2 ALPS DualPoint TouchPad          id=13   [slave  pointer  (2)]                                                                                                  
⎜   ↳ AlpsPS/2 ALPS DualPoint Stick             id=14   [slave  pointer  (2)]                                                                                                  
⎣ Virtual core keyboard                         id=3    [master keyboard (2)]                                                                                                  
    ↳ Virtual core XTEST keyboard               id=5    [slave  keyboard (3)]                                                                                                  
    ↳ Power Button                              id=6    [slave  keyboard (3)]                                                                                                  
    ↳ Video Bus                                 id=7    [slave  keyboard (3)]                                                                                                  
    ↳ Video Bus                                 id=8    [slave  keyboard (3)]                                                                                                  
    ↳ Power Button                              id=9    [slave  keyboard (3)]                                                                                                  
    ↳ Sleep Button                              id=10   [slave  keyboard (3)]                                                                                                  
    ↳ Integrated_Webcam_HD                      id=11   [slave  keyboard (3)]                                                                                                  
    ↳ DELL Wireless hotkeys                     id=15   [slave  keyboard (3)]                                                                                                  
    ↳ Dell WMI hotkeys                          id=16   [slave  keyboard (3)]                                                                                                  
    ↳ AT Translated Set 2 keyboard              id=12   [slave  keyboard (3)]   

Thanks

Thomas