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392
U3223QE, input lag, two computers
I am also experiencing this input lag issue, but on the U3223QE (a very similar monitor with an IPS Black display and slightly different port configuration). I am using the KVM feature of this monitor to switch between two computers; this computer is configured per the in-device setup:
- Data is provided via the USB-C to USB-A cable provided with the monitor (obviously brand new).
- Video is provided in parallel via an 8K HDMI-HDMI cable directly between the computer and monitor. This cable is also brand new / undamaged.
The mouse is very laggy; and the amount of lag seems to change depending on which application is foregrounded (and sometimes which WINDOW of an application is foregrounded, which is even weirder).
- The laptop I'm connecting has a NVIDIA GeForce RTX 2070 with 32GB of RAM, running the latest driver. It's a professional spec graphics card, which is why this lag is particularly puzzling (and particularly annoying for my professional work).
- The system is reporting both that both monitors are running at 60Hz refresh rate, so I don't see a mismatch of refresh rates.
TLDR: using factory supplied/fast cables, have ultra-fast graphics card, computer and monitor are directly connected exactly per setup instructions, refresh rates are reporting as both being identical (60Hz).
Got any other ideas?
DreadPirateWesley
3 Posts
0
September 8th, 2023 04:56
@DELL-Chris M Hi Chris, thank you for the pointers - I had to register the monitors and contacted Dell chat support. They helped me to troubleshoot the issue by attaching the monitors to my second laptop only (which did NOT have any input lag, even though it was a much lower-spec machine) and this helped us to determine that the problem was most likely with the ASUS machine rather than the monitors.
After some additional research, I found one helpful suggestion which indicated that Intel processor-based graphics acceleration could conflict with the NVidia GPU. I downloaded Intel Graphics Command Center, which clearly showed that in multi-monitor mode the laptop screen was being driven by the Intel Graphics while the monitors were being driven by the NVidia GPU. By disabling the Intel Graphics in the Windows Device Manager (under "Display adaptors"), I was able to get all monitors driven by the NVidia GPU, eliminating all input lag (and vastly improving laptop-only graphic performance too, incidentally).
Providing this detailed debrief in case anyone else also encounters inexplicably poor performance after attaching external monitors to a GPU-equipped machine.
(edited)
DELL-Chris M
Community Manager
Community Manager
•
55K Posts
1
September 5th, 2023 13:52
To receive assistance from Dell chat support, they need to first verify the warranty status and ownership. Then you must troubleshoot with them. Click the "Get Help Now" icon on the right to start a live chat session. Provide to them the private U3223QE Service Tag.
* Connect the provided AC power adapter to the Laptop
* Open the U3223QE Menu- Display- USB-C Prioritization
- Set it to High Data Speed
* Then test that mouse on all five USB-A downstream ports