Context:

• HP Elitebook 8440P outfitted with SSD 22.04
• Screen does NOT flicker with 16.04 SSD
• External Display Port monitor does NOT flicker

Seeking procedure to diagnose / remedy laptop-screen flicker

Diagnostics

uname -a

returns

Linux mqtt 6.2.0-26-generic #26~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Thu Jul 13 16:27:29 UTC 2 x86_64 x86_64 x86_64 GNU/Linux

lsb_release -a returns:

No LSB modules are available.Distributor ID: UbuntuDescription:    Ubuntu 22.04.3 LTSRelease:    22.04Codename:   jammy

22.04.3 Upgrade to 22.04.5

sudo apt-get updatesudo apt-get upgradelsb_release -a | grep Description

returns:

Description:    Ubuntu 22.04.5 LTS