[RESOLVED] Brightness and keyboard backlight keys stopped working (Ubuntu 22.04)

With a recent update, the brightness and keyboard backlight functions stopped working from the internal keyboard. With the external keyboard, the display brightness can still be controlled. I tried different kernel versions, but that does not change anything. How can I fix this?

I’m on elementary OS 7.1 (Ubuntu 22.04) with a 13" 12th gen Framework laptop.

Hi Wout,

As elementary is based on Ubuntu 22.04 (as Ubuntu 22.04 is supported and tested, I cannot fathom why any updates would change the behavior.

Can I get a look at your grub parameters?

cat /etc/default/grub

We’re looking at this section here, to make sure the parameters are correct as outlined below.

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash module_blacklist=hid_sensor_hub"

sudo update-grub (fixed typo)

If instead, you’re using the /etc/modprobe.d/framework-als-blacklist.conf approach, this may be why it’s not working. We recommending using the above grub method as it is tested.

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So, for some reason, grub was configured as quiet splash while I’m pretty sure I added the module_blacklist parameter at some point during the installation.

Anyway, it’s working again now. Thanks!

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Awesome, delighted to hear this has been resolved.

Just want to note that the update step is sudo update-grub, with a hyphen in between.

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Whoops, that was a typo - thanks and fixed.