  XPS 8950, Windows-11 using an old KVM switch (Trendnet TK-222DVK). It has external power. 1. suggests that the XPS 8950 USB might be undervolted at boot 2. and/or wake/sleep cycles. 3. I have tried all USB ports on my XPS. 4. Has anyone else experienced similar intermittent USB issues on their XPS? 1. Well, AFAIK ... it can be under-volted/under-amped if your USB-device has it's own external power. 2. For now, I would suggest you temporarily disable Sleep and/or Hibernation. Turn computer On to use it, turn if Off at night. 3. Good. I assume it's USB-v3.0 capable. I was going to suggest you try the other USB-v3.0 ports and they are likely broken-up into a couple of different internal USB-Hubs/Controllers. 4. Yes, others have reported various USB and networking communication and Latency problems, as they come fresh from factory. Hard to say exactly what is causing it as I don't own the particular model.  Because the KVM has to handle all keyboard/video/mouse data ... seems like total-bandwidth and Latency of the USB port would be important.  Most were fixed by uninstalling Intel Killer Performance Suite. This is from my notes: I've found that you can simply uninstall Intel Killer Performance Suite from Control-Panel/Programs-Features, and then reboot . I found that all the Killer/xTend Services were also properly uninstalled (but you should probably double-check for lingering Services anyway). The base ethernet Network Interface Card drivers are left in place and the NIC still works fine (actually, usually better than before as it's a leaner/simpler configuration). Recent threads are here: [URL] and here [URL]#M75594 and more Latency issues here [URL] (I think some of these DAW-users are using external USB audio interfaces on their XPS-8950/8940). Uninstalling Support Assist is another thing that fixes various problems. We have seen that for a while now over the years. Seems it's depended on various Processes and Services and tends to get overly-needy as it tries to monitor everything. Personally, on my (similar) Aurora-R6 ... I don't run Support-Assist, Dell/Alienware Update,  Intel Killer Performance Suite ... or really any of that kind of "enhanced driver-suite" and/or Dell stuff. Provides a leaner install and everything just seems to work (including networking and various external USB peripherals).
Hi All. [XPS 8950, Win11] I am using an old KVM switch (Trendnet TK-222DVK). It has external power. I have never had issues with it before on other machines. On my new XPS 8950, however, I am having intermittent problems. Sometimes I get the Win11 popup error "USB device not properly detected". Sometimes the KVM is properly detected at boot. Sometimes the KVM gets dropped after a wake/sleep cycle or KVM toggle. The KVM itself might be failing. However, observing the lights on the KVM suggests that the XPS 8950 USB might be undervolted at boot and/or wake/sleep cycles. I have turned off all power saving USB options in the Device Manager. This KVM does not have a driver. It is a simple USB passthru. I have tried all USB ports on my XPS. I have ordered a new KVM, but this seems to me like either a hardware, a BIOS or an OS issue related to my XPS. Has anyone else experienced similar intermittent USB issues on their XPS?
XPS 8950, USB undervolted