echo "blacklist dell_wmi" | sudo tee /etc/modprobe.d/fnbt-fix.conf # or more specifically: echo "blacklist fnbt" | sudo tee /etc/modprobe.d/fnbt-fix.conf sudo update-initramfs -u
sfc /scannow
Note: If you performed a clean install, this utility might be missing. Proceed to Solution 2. acpi fnbt0000 driver fix
If the driver alone doesn't fix the issue, you likely need the software layer that interprets the hardware signals. echo "blacklist dell_wmi" | sudo tee /etc/modprobe
Upon reboot, Windows will rebuild the ACPI device tree and reinstall the driver from the driver store. acpi fnbt0000 driver fix