DELL
Latitude 5440
Core Ultra 5 134U
USB-A Port Not Working Fix
USB-A port not working on the Dell Latitude 5440 Core Ultra 5 134U means USB devices plugged into the USB-A 3.2 Gen 1 port are not detected, appear briefly and disconnect, or the port provides no power to connected devices. The Latitude 5440 has two USB-A 3.2 Gen 1 ports routed through the Intel Platform Controller Hub on the Core Ultra 5 134U Meteor Lake-U platform.
- USB Selective Suspend setting powering off ports during idle
- Intel USB 3.2 xHCI controller driver needs updating from Dell Support
- USB port physically damaged from connector stress
- Power delivery fault from Latitude 5440 mainboard USB power rail
Disable USB Selective Suspend
Open Control Panel → Power Options → Change plan settings → Change advanced power settings. Expand USB settings → USB selective suspend setting and set to Disabled. USB Selective Suspend powers off USB-A ports during idle to save battery. When the port is in suspended state, new device insertions are not detected. Disabling this ensures USB-A ports on the Latitude 5440 remain powered and ready for device detection at all times.
Update Intel USB 3.2 xHCI Driver
Download the Intel USB 3.2 controller driver for the Dell Latitude 5440 (Model P166G) from Dell Support. The Dell-certified Intel xHCI driver provides correct power management profiles for the USB-A ports on the Meteor Lake-U (Core Ultra 5 134U) platform. Outdated xHCI drivers cause device enumeration failures where the USB device appears briefly in Device Manager and then disappears without any error.
Fix: Test USB-A Port with Multiple Devices
Test the USB-A port with a USB flash drive, USB keyboard, and USB mouse. If the port works with one device type but not another, the issue is device-specific (try a different USB cable for the failing device). If the port does not detect any device type, the issue is the port hardware or driver. Also test both USB-A ports on the Latitude 5440. If only one port is affected, a port-specific hardware fault or connector damage is more likely. If both USB-A ports fail simultaneously, a driver or power rail fault is more likely.
Per Khairul Anwar, IT support technician using Dell Latitude 5440 Core Ultra 5 134U for field support work: “USB-A port on the Latitude 5440 stopped detecting USB drives but detected a keyboard. Disabled USB Selective Suspend in Power Options and the USB drive was detected reliably. The Selective Suspend was powering down the port when the USB drive was inserted in an idle state causing the drive to not enumerate.”
Fix: Update Dell BIOS
Download the latest BIOS for the Dell Latitude 5440 (Model P166G) from Dell Support. BIOS updates include embedded controller and Intel PCH (Platform Controller Hub) firmware that manages USB power delivery timing on the Core Ultra 5 134U Meteor Lake-U platform. An outdated BIOS can cause the Intel PCH USB-A power rail to not negotiate correctly with USB bus-powered devices that draw current at connection time, causing the device to fail to enumerate despite the port being physically functional.
Frequently Asked Questions
Why is the USB-A port not working on Dell Latitude 5440?
USB Selective Suspend is powering off the port during idle, the Intel xHCI USB driver needs updating from Dell Support, or the BIOS needs a PCH firmware update. Disable USB Selective Suspend in Power Options, install the Intel USB driver from Dell Support for Model P166G, and update BIOS via Dell Support or Dell Command Update.
What USB standard does the Dell Latitude 5440 USB-A port support?
The Dell Latitude 5440 has two USB-A 3.2 Gen 1 ports that support USB 3.2 Gen 1 (5 Gbps) and backward-compatible USB 2.0 and 1.1 devices. The ports also provide USB bus power at 5V 900mA for USB 3.2 devices and 5V 500mA for USB 2.0 devices. For devices requiring more power, use the USB-C Thunderbolt 4 port which supports USB Power Delivery.
Can I use the Dell Latitude 5440 USB-A port while charging?
Yes. USB-A ports on the Latitude 5440 function during charging, during battery power, and when connected to a Dell dock via USB-C or Thunderbolt. In clamshell mode, the USB-A ports remain active. There is no power conflict between the charging circuit and USB-A port power delivery on the Core Ultra 5 134U Meteor Lake-U platform.
Why does the USB device disconnect randomly from Dell Latitude 5440 USB-A port?
USB Selective Suspend is suspending the USB-A port controller during periods of USB inactivity, causing connected devices to disconnect. Disable USB Selective Suspend in Power Options to stop the port from being suspended. Also check Device Manager for the USB Root Hub devices, open Properties, Power Management, and uncheck allow the computer to turn off this device to save power for each USB Root Hub.
Conclusion
USB-A port not working on the Dell Latitude 5440 Core Ultra 5 134U is fixed by disabling USB Selective Suspend in Power Options, updating the Intel xHCI USB driver from Dell Support for Model P166G, and updating BIOS for Intel PCH USB power delivery firmware improvements. The Latitude 5440 USB-A 3.2 Gen 1 ports require the Dell-certified Intel xHCI driver and current BIOS for stable USB device detection and power delivery on the Core Ultra 5 134U Meteor Lake-U platform.
Ryan holds a Computer Science degree and has over 20 years of hands-on experience with PC hardware, software, and driver troubleshooting. He is the author behind softwaredriverdownload.com, where he helps everyday users fix driver issues quickly and accurately. Ryan has personally tested most of the fixes on this site across a range of Windows 10 and Windows 11 machines.
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