comman i tried

sudo modprobe ddcci


Jul 18 13:59:17 phoenix systemd-modules-load[393]: Inserted module 'ddcci' 
Jul 18 13:59:17 phoenix kernel: [2.991677] ddcci: loading out-of-tree module taints kernel. 
Jul 18 13:59:17 phoenix kernel: [2.991697] ddcci: module verification failed: signature and/or required key missing - tainting kernel 

I am using ubuntu 20.04 with i3wm

1 Answer 1


I solved it myself
ddcci loads two modules actually

MODULES := ddcci ddcci-backlight

so we need to load both modules

sudo modprobe ddcci
sudo modprobe ddcci-backlight

this fixed the issue

I will keep this post... so that anyone having this issue find it helpful

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