OptiPlex 7450 All-In-One, HDMI in resolution issues

Question

I am using a Dell Latitude 5420 laptop which works fine with other monitors but on this AIO it won't go above 1360x768 - makes it unusable for me to switch between personal (AIO) and work (laptop).  All drivers are up to date as far as I can tell The All-In-One runs fine at 1920*1080 natively so the panel can certainly run at that resolution The Laptop outputs at 1920*1080 to another (dumb) screen The All-In-One displays input from my Linux machine at 1920*1080 through the HDMI-in port It's just the combination of HDMI-in into the All-In-One from the Latitude 5420 that doesn't work For the record, it's a simple HDMI cable, no adapters or converters involved Any help gratefully received!

redxps630 · Answer

Obviously all hardware are able to support 1080p as you have verified independently, so this may be a driver issue. One Dell AIO user had similar conundrum “When I try to use my AIO as external monitor for my laptop, since a few days the maximum resolution is 1360x768. I did not change anything in the settings and when I connect my laptop to another monitor, I get a higher resolution. How can I solve this?”

suggested solution: “I disabled the driver for the display adapter on my laptop, and now it works 1920x1080. Don't know if it will work for you..”

IanJB · Answer

Thanks Red,

That didn't work for me unfortunately but I found a workaround using a USB-C to HDMI adapter (has USB-c and USB-A ports too). Seems to work nicely at 1920*1080 now.

Thanks for your help though.

Optiplex Desktops

Was this post helpful?