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Eddy.
Updated: 11/18/2019
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The title says it all, I updated the wifi driver to "Marvell Semiconductor, Inc. – Net – 15.68.17013.110", and after that update, I can't connect to a 5GHz wifi connection, I can only connect to 2.4 GHz. when i try to connect to the 5GHz, it says: "Unable to connect to this network". Uninstalling the wifi driver, and restarting the device did help me get the 5GHz connection back to my Surface book, but when i decided to try to install the same driver again, and try to connect to 5GHz again, the same "Unable to connect to this network" appears. Does anyone have this issue?
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Thank you for reporting the issue. A fix is now available through Windows Update.
For more information, please visit our Surface Update History page.
Eddy.
Updated: 11/18/2019
Well, I've had enough of this. Every morning I try to uninstall and reinstall my network card driver in the hopes that today will be the day that this issue is finally resolved and everyday I experience the same thing. The network driver crashes the moment I try to access the Internet taking the Bluetooth driver with it. I can't use my wireless Bluetooth headset to make business calls; I can't use my Bluetooth mouse or keyboard and I can't connect to the Internet wirelessly. This laptop is of little use to me anymore. I have no choice but to shop for a new laptop next week.
I have the same problem with the same driver version as well, applied on 8-1-2019. Your post gave me an idea that maybe it was just the 5GHz channel, but alas, I have the same issue with the 2.4GHz spectrum as well; I went to force the band of the Marvell AVASTAR WiFi adapter to 2.4GHz only and it still would not connect.
I have the Surface Pro (Gen4.5? it's the one where they didn't announce the version) but my experience is the exact same as yours; the moment that driver was applied, I can no longer attach to my home WiFi system (UniFi). Interestingly, the Surface Pro WILL attach to the WiFi hotspot on my iPhone.
Very interesting issue for sure. I normally have this system docked and using Ethernet, but I'm about to travel with it of course.