Dell Latitude 3420 - ArchWiki

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Hardware | PCI/USB ID | Working?
--- | --- | ---
Touchpad |  | Yes
Keyboard |  | Yes
GPU | `8086:9a49` | Yes
Webcam | `0c45:6d1a` | Yes
Microphone |  | Yes
Ethernet | `10ec:8168` | Yes
Wifi | `8086:a0f0` | Yes
Bluetooth | `8087:0026` | Yes
SD-card reader |  | Untested
Audio | `8086:a0c8` | Yes
Fingerprint reader | `27c6:639c` | Untested
TPM |  | Untested

## Performance

This device can be throttled and have very bad performance, even if setting on BIOS the Ultra Performance option.

Installing and enabling thermald seems to fix the issue, allowing the processor to reach higher speeds, while also running on higher CPU temperature.

## Accessibility

The appearance of the BIOS is pretty simple and not very colorful, so it might work well with OCR software. However, it requires the user to use a mouse.

Note: Blind users should request the help of a sighted person to change firmware settings.

- System Setup : `F2`
- Boot Menu: `F12`

From the official manual see Navigation keys.

## Firmware

fwupd supports update for those devices:

- Touchpad
- Fingerprint sensor
- NVMe drive
- System firmware
- TPM
- UEFI device firmware
- USB host controller

## Video

For better video support install mesa, vulkan-intel. As per Intel graphics#Installation, it is not recommended to install xf86-video-intel.

### Tearing when using Xorg and modesetting driver

However, if you experience too much tearing you could add back xf86-video-intel driver to alleviate tearing when using Xorg.

You can additionally enable `TearFree` (see Intel graphics#Tearing), but be aware that there is a noticeable impact on performance.

## Audio

Sound and microphone requires the installation of sof-firmware to work, else no card / output device will be detected, see ALSA firmware.

## Function keys

Key | Visible?1 | Marked?2 | Effect
--- | --- | --- | ---
`Fn+Esc` | No | Yes | Enables Fn lock
`Fn+F1` | Yes | Yes | `XF86AudioMute`
`Fn+F2` | Yes | Yes | `XF86AudioLowerVolume`
`Fn+F3` | Yes | Yes | `XF86AudioRaiseVolume`
`Fn+F4` | Yes | Yes | `XF86AudioPlay`
`Fn+F5` | Yes | Yes | Enables/disables keyboard backlight
`Fn+F6` | Yes | Yes | `XF86MonBrightnessDown`
`Fn+F7` | No | Yes | `XF86MonBrightnessUp`
`Fn+F8` | Yes | Yes | Inputs `Super+p`
`Fn+F9` | No | No | Unmarked keybinds
`Fn+F10` | Yes | Yes | `PrintScreen`
`Fn+F11` | Yes | Yes | `Home`
`Fn+F12` | Yes | Yes | `End`
`Fn+Right Ctrl` | No | Yes | Contextual menu
`Fn+Up` | Yes | Yes | `PageUp`
`Fn+Down` | Yes | Yes | `PageDown`

1. The key is visible to `xev` and similar tools
2. The physical key has a symbol on it, which describes its function

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