The online Dell Commercial Docking Compatibility PDF states that the Latitude 5521 is not supported with either the UD22 or the HD22Q. It states at bottom = These notebooks have higher power requirements, so the Dell Universal Dock UD22 or Dell Dual Charge Dock HD22Q is not recommended. If these are docked with the Dell Universal Dock UD22 or Dell Dual Charge Dock HD22Q, the notebook needs to be plugged in externally for optimal performance. For the best experience with these notebooks, choose from Dell Dock WD19/WD19S (180W), Dell Performance Dock WD19DC / WD19DCS, Dell Thunderbolt Dock WD19TB/WD19TBS or Dell Thunderbolt 4 Dock WD22TB4 based on the notebook’s power requirement, so you no longer need anadditional power adapter.
Hi there, My employer just moved to a new office and has implemented dual monitors using a Dell UD22 Universal Dock (HDMI + Dual Port). We are also using the dock to provide ethernet and AC power, all through the thunderbolt port.It seems to be working for everyone but for me, it keeps randomly disconnecting, several times in a short span of 2 or 3 hours. Sometimes it reconnects, others it never does and I have to reboot the dock manually. Most times this fixes the issue for a short period of time. I'm using a Dell Latitude 5521, with drivers and bios with the latest update through Dell Support Assist app. I've also updated dock firmware using the Dell Universal Dock UD22 Firmware Update Utility. Windows 10 is also up to date with the latest. Same for Intel Thunderbolt driver.I'm experiencing this issue with all 5 docks I've tried so far so I doubt it's a specific dock issue unless it's a design incompatibility with this laptop. Maybe an overheating issue, but I assume it would happen with other laptops as well.  Honestly I'm at a loss for things to try. I have seen several posts with the same random disconnection but for different laptops and dock models.Can you help with ideas to troubleshoot the issue? Thanks
Latitude 5521, disconnects from UD22 universal dock?