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# ASUS Zenbook UM425

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Reason: Hardware table needs some adjustments, page is missing a proper function keys table (Discuss in Talk:ASUS Zenbook UM425)

Hardware | PCI/USB ID | Working?
--- | --- | ---
GPU |  | Yes
Wireless |  | Yes
Audio |  | Yes
Touchpad |  | Partial
Keyboard |  | Partial
Camera |  | Yes
Card Reader |  | Yes
Bluetooth |  | Yes

## Configuration

### Secure Boot (option)

In order to boot any Linux operating system, navigate to BIOS (hold F2 during power-on), then hit `F7` or click on Advanced Menu, then the Security tab and set Secure Boot to `Off`.

If the aforementioned Secure Boot option is a menu rather than an on-or-off option, click on Secure Boot, Key Management, then Reset to Setup Mode and confirm in the dialog.

### Video

See AMD and Hardware video acceleration.

### Audio

See PulseAudio.

### Touchpad

See Libinput.

The NumPad is working with asus-touchpad-numpad-driver implementation from GitHub. Be sure to install python-libevdev and i2c-tools before starting systemd's service, otherwise this script will not work.

### Keyboard

Some people encounter issues on cold boot where the keyboard is unresponsive.

Adding `i8042.probe_defer` to the kernel parameters seems to resolve the problem, this can be done by either rebooting, using a USB keyboard, or using chroot.

See https://lore.kernel.org/lkml/20211112180022.10850-1-tiwai@suse.de/T/ (this commit only seems to mention the UA version but this was tested on UX425QA).

### Battery charge threshold

Battery charge threshold is working. Laptop's battery stops charging at certain percentage when value in `/sys/class/power_supply/BATT/charge_control_end_threshold` is set to either `60`, `80`, or `100`. But upower may report the wrong charging status and percentage when the battery threshold is set below `100`; You may see the status listed as `"Charging"` even when the battery is fully charged to the limit, and the percentage may be one point short of the limit. For example when charging to `80`, the battery's charge may say `79`. See https://gitlab.freedesktop.org/upower/upower/-/issues/142

In order to automatically change the value at boot, user can create the systemd service: refer to Laptop/ASUS#Battery charge threshold

## Tips and tricks

See ASUS Zenbook UX430/UX530#Tips and tricks (with the exception of battery life, which is 20 hours for this model).

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