FYI - I already searched for similar post but none matches my case.
Please find all the information you need below and attached files.
Answers (N/A if not applicable)
Provide a detailed description of the issue
My laptop and extended monitor's resolution are both1920 x 1080. Text on my laptop screen looks nice but blurry on extended monitor.
Does it fail every single time, or only sometimes?
Every single time
Brand and Model of the system.
LenovoThinkpadT450s Touch screen
Hybrid or switchable graphics system?
Only on-board HD 5500
Make and model of any Displays that are used to see the issue(see note2 below).
Laptop: Thinkpad T450sT ouch Display
Extended monitor: Dell E2211H
How much memory [RAM] in the system (seenote2below)
Provide any other hardware needed to replicate the issue.
Hardware Stepping (see note1 below).
Operating System version (see note2 below).
64-bit Windows 10 Pro
VBIOS (video BIOS) version. This can be found in “information page” of CUI (right click on Desktop and select “Graphics Properties”.
Graphics Driver version; for both integrated Intel and 3rd party vendors (see note2 below).
SW or Apps version used to replicate the issue.
Single display, clone, or extended (see note2 below).
Display resolution & refresh rate setting of each display (see note2 below).
Both 1920x1080(recommend by default windows setting).
Refresh rate 60hz
AC or DC mode, i.e. is power cable plugged in or not?
How to repro
Please provide steps to replicate theissue.
These steps are very crucial to finding the root cause and fix.