Did you also change the setting on the WiFi card's Power Management tab in Device Manager by unchecking the box "Allow PC to turn off..." and then reboot? And while in Device Manager, click View>Show hidden devices, and look down the entire list for any "unknown" devices. If you find any, right-click and Uninstall them. Ultimately, you might just need to replace the internal Qualcomm WiFi card or -easier- disable it in Device Manager and plug in an external USB>WiFi dongle...
I am finding WiFi performance on the XPS 8930 to be slow and unreliable, with frequent periods where the broadband is almost unusable for minutes at a time. I have an XPS 8930 and an Inspiron 7737 next to each other on my desk using the same broadband service, and show PingPlotter for the same target and times on both machines. The 7737 shows some blips in connection every now and then but the 8930 pretty much loses the connection for four minutes. The timings are also extremely slow on the 8930. I have set the 8930 power plan to maximise performance and it does not allow any switching off or power saving activity with wireless, PCI etc. The 7737 is on balanced settings and does allow these things. All drivers are up to date. The WiFi adapter is Qualcomm QC9377 802.11ac. I don't understand why the 8930 should perform so badly compared to the 7737, any suggestions as to what I can do to fix this? [IMAGE]XPS 8930[IMAGE]Inspiron 7737
XPS 8930, Qualcomm QC9377, WiFi unreliable