Brightness flickering on Lenovo Yoga 720 | Ubuntu 18.04

I have a Lenovo Yoga 720 and am running Ubuntu 18.04. The screen changes brightness automatically every 5-10 sec. This does not happen with Ubuntu 17 or Windows 10 (dual boot). Please assist.

description: Convertible
product: 81C3 (LENOVO_MT_81C3_BU_idea_FM_YOGA 720-13IKB)
vendor: LENOVO
version: Lenovo YOGA 720-13IKB
serial: MP1CHKDC
width: 64 bits
capabilities: smbios-3.0 dmi-3.0 smp vsyscall32

2 Answers

This may be caused by the adaptive brightness setting. I had the same issue. It's way too aggressive for my preferences.

Go to Settings > Power then turn automatic brightness off

5

I have the same issue after upgrading Ubuntu to 18.04 from 16.04 on my XMG C404 laptop. Changing the Refresh Rate of my screen helped yesterday, today I'm back to flickering, although less often/disturbing than before. Any news what could be the cause?

Settings > Displays > Refresh Rate I reduced it from initially 60Hz to 59.96Hz. And then also tried increasing to 120Hz.

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