Fix Arch Network Bluetooth Error

Right now I’m using a Surface Pro 3 with Manjaro Linux.

~ uname -a
Linux vincent-surfacepro3 5.15.21-1-MANJARO #1 SMP PREEMPT Sun Feb 6 12:21:42 UTC 2022 x86_64 GNU/Linux

After a normal sudo pacman -Syu, after reboot, first I notice the Bluetooth mouse is not working, and then Wifi failed to connect either.

As a Linux newbie, I have to start debugging myself. After searching and browsing with Arch forum and Google, I tried below meaning steps.

Downgrade Kernel

Manjaro has an utility to manage kernel: mhwd-kernel.

Show all the installed kernels:

~ mhwd-kernel -li

Install a kernel:

~ mhwd-kernel -i linux515

To boot with the new installed kernel, reboot into Grub page. If there’s no such step when booting into system, pressing ESC during boot process works with such hidden grub page case. Then Select “Advanced …” and choose the new installed Linux kernel.

After booting with new Kernel, the wifi and bluetooth still does not work.

Investigate Log

Run sudo journalctl -b will print all the system and application logs, -b will narrow the logs only after the last boot.

There’re some red lines catch my attention:

➜  ~ sudo journalctl -b -1 | grep mrvl
kernel: mwifiex_pcie 0000:01:00.0: Direct firmware load for mrvl/pcie8897_uapsta.bin failed with error -2
kernel: mwifiex_pcie 0000:01:00.0: Failed to get firmware mrvl/pcie8897_uapsta.bin

It seems firmware driver is missing, I download from https://github.com/wkennington/linux-firmware/tree/master/mrvl and put it /lib/firmware/mrvl folder. After reboot, everything works fine now.