Where were you able to find information on the fixes in the BIOS changes in 1.4.0 ?
I just went through a 3 week ordeal where I sent my machine in to get a new board with an intel card, after support claimed they would change it. After getting it back with another Killer 1435 card, they now claim they will not replace my system board with one with an intel card, or replace the serviced unit. I wouldn't have sent the machine in at all. Unbelievable.
This has made a big difference for me too. Wifi stability seems to have been improved with the recent BIOS and driver updates but I am still noticing very slow speeds when connected to the internet to the extent where I am seeing download speeds at roughly half of what they should be when compared to other devices connected to the router.
I am coincidentally also connected to a BTHomehub and have found by default my XPS is using a 5GHz channel so after trying everything else recommended in this thread, I would try flipping the adapter setting to force it to use a 2.4GHz channel. As soon as I did this and repeated a speed check, straightaway performance doubled to levels I would expect to see so if anyone is seeing slow internet speeds, give this a try.
I am still experiencing wifi drops after updating the bios to 1.4.0 and updating to the latest killer wifi drivers 1.7.1034. Is this a wide spread issue? I am still within the return/exchange period and wonder if I should swap out my unit.
Try the following Fix:
1) Update your windows 10 to latest version. (Windows 10 1803)
2) Update to latest bios using dell support assist program (latest should be 1.1.3)
3) Now Uninstall your Killer Wifi Network drivers using the killer uninstaller program
Restart your PC
3) Now install the latest Killer Wifi Drivers for Windows 10 v1803
This seemed to have fixed my wifi issues
Can someone from Dell please advise on this ongoing unresolved issue? You have released multiple BIOS and Killer Driver versions across 2018, but the underlying issue is NOT fixed completely.
Here's what I find, and it's hard to believe this is a hardware fault.
The Killer wifi interface refuses to create new connections after a period of time. Let's say I'm in a Citrix connection or on a Skype call, these work fine on an ongoing basis. But then after 15-30 minutes or so: going to a new browser and trying to browse anywhere ,or perform a nslookup or ping gateway from the command line, and nothing works. New connections are being blocked by something. Turning Wifi off then on again (within the Win10 taskbar icon) resolves the issue ,and new connections can be made.
Unsure what protocol level this is happening on. @DELL please look into this further. thanks
I bought a XPS 13 9370 on Sep 21 and had the same problem on low wifi performance. The wifi speed of XPS 13 is 90% lower than other laptops use same router in my house. I use speedtest dot net to test my download speed with Chrome browser.
Unfortunately, I tried all the thing you stated but it did not pan out. I updated the latest BIOS, Killer driver, etc. The issue was still there.
P/s: Issue fixed
Finally, I realized that one of my extension on Chrome is changing my IP. After turning it off, the speed was on point.