xev list the key events for any key, including the non working keys.
I'll attach a text file showing the output of the xev.
I have tested it pressing the play (XF86AudioPlay), stop (XF86AudioStop), previous (XF86AudioPrev), next (XF86AudioNext) keys, that are the non working keys. After pressing those keys I pressed the working keys. (XF86AudioLowerVolume), (XF86AudioRaiseVolume). Both (the working and non working keys) showed response.
Hi Sebastien
xev list the key events for any key, including the non working keys.
I'll attach a text file showing the output of the xev.
I have tested it pressing the play (XF86AudioPlay), stop (XF86AudioStop), previous (XF86AudioPrev), next (XF86AudioNext) keys, that are the non working keys. After pressing those keys I pressed the working keys. (XF86AudioLower Volume) , (XF86AudioRaise Volume) . Both (the working and non working keys) showed response.
Thank you very much for your help