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Latitude 5330 won't connect to LG Ultrafine 4K Ergo via USB-C but will connect with HDMI
Hi all,
Hoping to get some assistance with connecting my laptop to my monitor. I got a laptop replacement (Latitude 5330) through my work - same exact laptop, but for some reason it will not connect to my external LG monitor through my USB-C, however it does charge when plugged in. I tried connecting it to my Macbook and it charges and connects to the monitor so I am not sure what setting is wrong on my laptop. It is able to connect to my monitor via HDMI but I would prefer the USB-C since it charges. Thanks in advance.
tmbaCCmn
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February 21st, 2023 17:00
We have the same problem with some of these 5330 models in our organization. I don't have a permanent solution (waiting on Dell for a fix) but if you keep the USB-C plugged in and restart your laptop a couple of times, it often connects the displays for us. Worth a try.
CirrusCloud
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June 8th, 2023 10:00
Sounds like a similar problem to the one mentioned in this thread. I'll post an abbreviated version of my reply to that one. My reply was specific to having a Dell dock but you can try it and see if it helps your situation too:
The problem is that Display Stream Compression is being used which does not always work right with various monitors. The solution was to add the following registry value to force-disable the Display Stream Compression (DSC). The key is different depending on your system. It will be either
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\0000
or
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\0001
The right key will have a lot of other values in it relating to the Intel graphics driver, one of which will be a string value key named "DriverDesc" with its value data showing as "Intel(R) Iris(R) Xe Graphics" or similar. Add a new DWORD (32-bit) value in this key with the following attributes:
Value name: DPMstDscDisable
Value data: 2
Then restart the computer to apply the setting.
It's basically the same thing as in this Dell guide except you set the value at the end to 2 instead of 0: https://www.dell.com/support/kbdoc/en-us/000197102/how-to-enable-display-stream-compression-on-latitude-precision-and-xps. The start of this guide also shows how to identify the exact registry key for the Intel drivers using Device Manager.