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ArchWiki / Dell Latitude 3420

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.

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 Sound Open Firmware to work, else no card / output device will be detected.

Fingerprint reader

The built-in fingerprint reader (27c6:639c) is supported and works with fprint.

Fingerprint enrollment may fail if the device is not initialized properly. If issues occur, try reconnecting the device or rebooting.

Function keys

  1. The key is visible to xev and similar tools

  2. The physical key has a symbol on it, which describes its function