Monitor issues with USB 3 ports on Dell P3222QE when using Display Ports
Monitor issues with USB 3 ports on Dell P3222QE when using Display Ports
Hello everyone, I'm facing an unusual problem that's really puzzling me. Let me briefly outline my setup: - Monitor model is Dell P3222QE
- Connected via DP cable to a 3060ti PC
- Also linked to my laptop (T490S, USB-C, 4K60)
- External KVM switch for mouse and keyboard (not critical but useful)
- Both devices plug directly into the laptop and PC motherboard, not the monitor
The issue arises when I turn on the laptop: USB 3 ports on the monitor work fine, and I can charge my phone or use the monitor light bar. But once the laptop is off, all USB 3 ports stop functioning.
I've tried a few things:
- Setting "Other USB Charging" to "On in Standby mode"
- Adjusting USB-C priority to "High resolution"
- Restarting everything (lol)
Additionally, I noticed that my previous Dell U2722DE models charged USB devices quickly and reliably. With this one, even when it works, charging my iPhone takes a full day—possibly because the 4K60 resolution is draining power from the USB ports. Or maybe I'm making a mistake again.
Any suggestions would be greatly appreciated!
Using the USB from the laptop and turning it off is typical behavior. When the laptop shuts down, the USB connection usually ceases as well. DisplayPort isn't a USB cable—it doesn't transmit USB signals. Therefore, the monitor's USB ports aren't linked to the PC; they're connected only through the laptop. The USB power on the monitor is restricted by the laptop's input, not the monitor itself.
I never talked about using the USB 3s on the laptop. What I meant was that once I powered off the computer and cut off the USB-C connection, the USB ports on the monitor also shut down. That doesn’t make sense because the monitor is connected to power and running. It’s not logical, especially since I used my old monitor (U2722DE) and it kept working with the ports active, even when both devices were off.
Wow, I wasn't expecting that. I thought the price was better than the U series, so they had to reduce expenses—but this really doesn't make sense. LOL, it's not the big deal for me, but it's impressive nonetheless. Thanks for sharing this info! I'd have liked to know more before buying. I've already read many reviews, but this one was new to me. Still, I wouldn't go out of my way for a brand-new unit. I got it second-hand from someone who had used it for a week and still had a solid warranty. It was a great deal—almost 40% cheaper than new. The screen quality is top-notch, matching a MacBook M3 Pro in appearance, with only minor color variations that most people won't even notice. I also wouldn't purchase it brand new. For my work in a bright room, a 250 nits display is perfect for color grading, especially at this price point. I was torn between this model and the Benq PD3205U, but the low brightness made me hesitate. Overall, I'm really satisfied so far!
The USB ports function more like a separate hub built into the monitor. It's best to use a dedicated USB charger for your gadgets.
From the article Alex shared, I gathered several options for charging my devices. Using the monitor was especially convenient because it allows a slower charge, which I prefer. It still makes me wonder why charging is so slow even with an active USB-C hub, especially since the monitor’s high draw might be the reason.
The device is constrained by the connected laptop's output, reaching up to 65W. For charging, link your monitor's USB-C port to a 65W charger and it will work.