Gamepad Buttons was tested in Free Libre video Games: SuperTux 2 

2016 models and later have LED lighting on touchpad.
All Dualshocks 4 have audio jack port, and on Trisquel GNU/Linux
Output is Dualshock 4 [CUH-ZCT2x] Analogue Stereo 
Audio from jack port tested on The Beatles Rubber Soul Album (Parlophone CD)
In My Life song works without audio problems on JVC Headphones.

 Most important buttons & Touchpad works without problems, only PSButton not doing nothing* 
(without added extra software from Trisquel repositories*)

 lsusb -d 054c:09cc 

 Bus 005 Device 003: ID 054c:09cc Sony Corp. DualShock 4 [CUH-ZCT2x] 

cat /etc/*-release

DISTRIB_ID=Trisquel
DISTRIB_RELEASE=11.0.1
DISTRIB_CODENAME=aramo
DISTRIB_DESCRIPTION="Trisquel GNU/Linux 11.0.1, Aramo"
NAME="Trisquel GNU/Linux"
VERSION="11.0.1, Aramo"
ID=trisquel
ID_LIKE=debian
PRETTY_NAME="Trisquel GNU/Linux Aramo (11.0.1)"
VERSION_ID="11.0.1"
VERSION_CODENAME="aramo"
UBUNTU_CODENAME="jammy"
HOME_URL="https://trisquel.info/"
SUPPORT_URL="https://trisquel.info/wiki"
BUG_REPORT_URL="https://gitlab.trisquel.org/trisquel"
PRIVACY_POLICY_URL="https://trisquel.info/legal"

 hwinfo --usb 

06: USB 00.2: 0401 Multimedia audio controller
  [Created at usb.122]
  Unique ID: q8Yy.XF4gjaLXEA4
  Parent ID: 2XnU.v+N+B0xY+P6
  SysFS ID: /devices/pci0000:00/0000:00:1d.0/usb5/5-2/5-2:1.2
  SysFS BusID: 5-2:1.2
  Hardware Class: sound
  Model: "Sony DualShock 4 [CUH-ZCT2x]"
  Hotplug: USB
  Vendor: usb 0x054c "Sony Corp."
  Device: usb 0x09cc "DualShock 4 [CUH-ZCT2x]"
  Revision: "1.00"
  Driver: "snd-usb-audio"
  Driver Modules: "snd_usb_audio"
  Speed: 12 Mbps
  Module Alias: "usb:v054Cp09CCd0100dc00dsc00dp00ic01isc02ip00in02"
  Config Status: cfg=new, avail=yes, need=no, active=unknown
  Attached to: #21 (Hub)

16: USB 00.3: 10503 USB Mouse
  [Created at usb.122]
  Unique ID: HKo0.O1A7T9yAcY0
  Parent ID: 2XnU.v+N+B0xY+P6
  SysFS ID: /devices/pci0000:00/0000:00:1d.0/usb5/5-2/5-2:1.3
  SysFS BusID: 5-2:1.3
  Hardware Class: mouse
  Model: "Sony DualShock 4 [CUH-ZCT2x]"
  Hotplug: USB
  Vendor: usb 0x054c "Sony Corp."
  Device: usb 0x09cc "DualShock 4 [CUH-ZCT2x]"
  Revision: "1.00"
  Compatible to: int 0x0210 0x0001
  Driver: "usbhid"
  Driver Modules: "usbhid"
  Device File: /dev/input/mice (/dev/input/mouse2)
  Device Files: /dev/input/mice, /dev/input/mouse2, /dev/input/event10, /dev/input/by-id/usb-Sony_Interactive_Entertainment_Wireless_Controller-if03-event-mouse, /dev/input/by-path/pci-0000:00:1d.0-usb-0:2:1.3-event-mouse, /dev/input/by-id/usb-Sony_Interactive_Entertainment_Wireless_Controller-if03-mouse, /dev/input/by-path/pci-0000:00:1d.0-usb-0:2:1.3-mouse
  Device Number: char 13:63 (char 13:34)
  Speed: 12 Mbps
  Module Alias: "usb:v054Cp09CCd0100dc00dsc00dp00ic03isc00ip00in03"
  Driver Info #0:
    Buttons: 1
    Wheels: 0
    XFree86 Protocol: explorerps/2
    GPM Protocol: exps2
  Config Status: cfg=new, avail=yes, need=no, active=unknown
  Attached to: #21 (Hub)