[metildaa]

The first gen Archer C7 routers kernel panic as Qualcomm decided to not support the 5GHz card in the driver they use (but later revisions of said card are supported). You end up needing to open the router and remove the card just to get it to boot.

[mangix]

That issue will be fixed in 19.07.

https://github.com/openwrt/openwrt/commit/34113999ef430ce74a...

Given that the pci card is removable, it makes sense to replace with something else.