24hrz refresh rate when I plug in a second display

[StreakyBacon]

Hi Everyone I hope someone else had this issue and was able to resolve it. I've looked around and tried a few things but have not had any luck.

For working at home I've purchases a HP Elite HP USB-C Dock G5 to pair with my company issued HP EliteBook 830 G6.I have set it up around my personal rig at home. I used to just run a HP USB-C to Display port dongle to my Asus Swift ROG Swift PG278Q but after adding a second monitor decided to get the dock. I added a LG 22MN430M-B to my setup.

The Asus monitor has only one DP input so I have to unplug it from the personal rig into the dock via the DP port. The LG monitor is connected via HDMI to the dock. The first issue I had was once plugging in the HDMI plug it will stop my Asus display and show a black screen only - my notebook still showed it as a connected device in the setting. I ended up doing an changing out the HDMI cable, going to a DP to HDMI cable while also performing a firmware update (needed to plug it to my personal rig as the business one is locked down).

I now get both monitors displaying however as soon as I plug in the LG monitor my Asus one gets forced to run at 24hz which is very noticeable while trying to work.  The LG runs at 60hz fine. My thinking is that the difference in resolution on these two monitor may be messing with it so tried to reduced the ASUS to 1080p from the native 1440p but still was stuck at the low hz. I am unable to update the driver  on my work laptop as its all locked down.  I have also tested another DP cable but it made no difference (works fine at 144hz on my personal rig). I went back to using the HDMI to HADMI cable to the LG monitor (which now works) but still got the 24hz.

Anyone able to suggest something that may help fix it. I've gone back to the single Asus monitor now. Thanks for your time and help.

Cheers,

Tom