HP ProBook 430 G4

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Reason: Do not use "my", "mine", etc. Also excessive logs. (Discuss in Talk:HP ProBook 430 G4)
Device Working
Intel graphics Yes
HDMI Yes
VGA Yes
Audio Yes
USB 3.0 Yes
Ethernet Yes
WLAN Yes
Bluetooth Yes
Touchpad Yes
Backlight control Yes - only software control
Function keys Yes
Hardware switches Yes
Card reader Yes
Webcam Yes
USB 3.0 Type-C™ port Yes
Fingerprint Reader No

Device information

This is a work in progress with information about the HP ProBook 430 G4. There are many configurations for these models of HP Probooks. The information below are given from a model HP ProBook 430 G4/822C, BIOS P85 Ver. 01.03 12/05/2016, shipped with a Core i5-7200U, 8GB, 256GB SSD. The notebook supports exchanging two memory modules and support one 2,5" disc drive and one M.2-SSD. The UEFI bios allows legacy boot.

A review in German is available here: HP ProBook 430 G4 review. Basic hardware works out of the box. No configuration was needed. Information for the "Not tested" units will be posted additionally.

Backlight

I have not found a solution so far to control the backlight via kernel hardware control keys via kernel. So backlight control works only via software. It works out of the box under Xfce and under i3wm using a custom command "xbacklight -inc/-dec 10".

ACPI errors

There are lots of acpi related error messages with kernel 4.9.x: 

Feb 21 16:08:57 localhost kernel: ACPI Error: Field [CAP1] at 96 exceeds Buffer [NULL] size 64 (bits) (20160831/dsopcode-236)
Feb 21 16:08:57 localhost kernel: ACPI Error: Method parse/execution failed [\_SB._OSC] (Node ffff88041f8ef348), AE_AML_BUFFER_LIMIT (20
...
Feb 21 16:09:01 laptop64 kernel: ACPI Error: Needed [Buffer/String/Package], found [Integer] ffff88041b43f750 (20160831/exresop-594)
Feb 21 16:09:01 laptop64 kernel: ACPI Exception: AE_AML_OPERAND_TYPE, While resolving operands for [OpcodeName unavailable] (20160831/ds
Feb 21 16:09:01 laptop64 kernel: ACPI Error: Method parse/execution failed [\_SB.WMIV.WVPO] (Node ffff88041f89bcd0), AE_AML_OPERAND_TYPE
Feb 21 16:09:01 laptop64 kernel: ACPI Error: Method parse/execution failed [\_SB.WMIV.WMPV] (Node ffff88041f89b780), AE_AML_OPERAND_TYPE
Feb 21 16:09:01 laptop64 kernel: ACPI Error: Needed [Buffer/String/Package], found [Integer] ffff88041ce2e318 (20160831/exresop-594)
Feb 21 16:09:01 laptop64 kernel: ACPI Exception: AE_AML_OPERAND_TYPE, While resolving operands for [OpcodeName unavailable] (20160831/ds
Feb 21 16:09:01 laptop64 kernel: ACPI Error: Method parse/execution failed [\_SB.WMIV.WVPO] (Node ffff88041f89bcd0), AE_AML_OPERAND_TYPE
Feb 21 16:09:01 laptop64 kernel: ACPI Error: Method parse/execution failed [\_SB.WMIV.WMPV] (Node ffff88041f89b780), AE_AML_OPERAND_TYPE
Feb 21 16:09:01 laptop64 kernel: ACPI Error: Needed [Buffer/String/Package], found [Integer] ffff88041b43f900 (20160831/exresop-594)
Feb 21 16:09:01 laptop64 kernel: ACPI Exception: AE_AML_OPERAND_TYPE, While resolving operands for [OpcodeName unavailable] (20160831/ds
Feb 21 16:09:01 laptop64 kernel: ACPI Error: Method parse/execution failed [\_SB.WMIV.WVPO] (Node ffff88041f89bcd0), AE_AML_OPERAND_TYPE
Feb 21 16:09:01 laptop64 kernel: ACPI Error: Method parse/execution failed [\_SB.WMIV.WMPV] (Node ffff88041f89b780), AE_AML_OPERAND_TYPE
Feb 21 16:09:01 laptop64 kernel: input: HP WMI hotkeys as /devices/virtual/input/input18
Feb 21 16:09:01 laptop64 kernel: ACPI Error: Attempt to CreateField of length zero (20160831/dsopcode-168)
Feb 21 16:09:01 laptop64 kernel: ACPI Error: Method parse/execution failed [\_SB.WMIV.WVPI] (Node ffff88041f89b280), AE_AML_OPERAND_VALU
Feb 21 16:09:01 laptop64 kernel: ACPI Error: Method parse/execution failed [\_SB.WMIV.WMPV] (Node ffff88041f89b780), AE_AML_OPERAND_VALU

Upstream report: https://bugzilla.kernel.org/show_bug.cgi?id=194833 - this seems to be a BIOS implementation bug.

Graphic card setup

Either modesetting driver or Intel driver seem to work well. Using the Intel driver with DRI3 works well. 

/etc/X11/xorg.conf.d/20-intel.conf
Section "Device"
      Identifier  "Intel Graphics"
 
     #Driver      "modesetting"
     #Option      "AccelMethod"     "glamor"
 
      Driver      "intel"
      Option      "AccelMethod"     "sna"

     #Option      "DRI"             "2"

     Option      "Backlight"       "intel_backlight" # use your backlight that works here

EndSection

Keyboard mapping

To avoid error messages appearing in the output of dmesg, add 

/etc/udev/hwdb.d/99-hp_g430_g4.hwdb
# HP ProBook 430 G4
evdev:atkbd:dmi:bvn*:bvr*:bd*:svnHP:pnHPProBook430G4:pvr*
 KEYBOARD_KEY_f8=wlan                                   # Wireless HW switch button

PCIe error in dmesg output

Feb 21 16:08:58 localhost systemd-udevd[75]: Assertion '!d->current' failed at src/libsystemd/sd-event/sd-event.c:733, function event_un
...
Feb 21 16:09:01 laptop64 kernel: pcieport 0000:00:1d.0: PCIe Bus Error: severity=Corrected, type=Physical Layer, id=00e8(Receiver ID)
Feb 21 16:09:01 laptop64 kernel: pcieport 0000:00:1d.0:   device [8086:9d18] error status/mask=00000001/00002000
Feb 21 16:09:01 laptop64 kernel: pcieport 0000:00:1d.0:    [ 0] Receiver Error         (First)

This one can be fixed with appending pci=noaer to the kernel boot line.

Fix cold boot hang

There seems to be some bug in i2c_i801 module implementation with HP notebooks. To fix system hang at cold boot add this module loading options and regenerate initrds. 

/etc/modprobe.d/i2c_i801.conf
# disable Host Notify + Interrupts
options i2c_i801 disable_features=0x30

See https://www.spinics.net/lists/linux-i2c/msg33938.html for more.