If your Broadcom adapter works fine but disconnects after your laptop sits idle, it might be a power management issue rather than a driver bug. Go to > Network adapters > Broadcom 802.11n .
The "802.11n" standard supports dual-band (2.4GHz and 5GHz). However, many Broadcom cards are single-band (2.4GHz only).
If your Broadcom adapter works fine but disconnects after your laptop sits idle, it might be a power management issue rather than a driver bug. Go to > Network adapters > Broadcom 802.11n .
The "802.11n" standard supports dual-band (2.4GHz and 5GHz). However, many Broadcom cards are single-band (2.4GHz only). broadcom 802.11n network adapter driver update