Lately, I had quite a problem with the wifi on my Inspiron 15 3521 laptop, a Broadcom BCM43142 based wifi card, also called Dell wirelles 1704 wifi card.
It could be no internet traffic at all while still being connected to the AP, freeze, or kernel panic, on Ubuntu 15.04. I don't know if it's an issue with broadcomwl driver on linux or a hardware problem. I need to test this in Windows 8 to check that out.
Anyway, I am already looking at replacing the card by possibly an Intel Advanced-N 6235 mini PCI-E card. Is this one compatible ? It does bluetooth too.
What is the format of the card ? mini PCI-e half size ?