舊筆電 連不到新WIFI 無線網路

 最近聽到一些使用者反應家裡的無線AP換了以後，筆電就抓不到wifi了，但家中其他設備都還連的到。

抓不到是連ssid都沒看到，所以也無法連線，但公司或手機的WIFI連線又正常，蠻怪的。

因為不是單一個案，所以開始覺得是不是新的wifi協定不支援比較舊的無線網卡

沒想到真是如此，可以參 考這一篇，主要是新的ap已經開始用802.11ax的協定了，但比較舊的網卡不支援，也沒有什麼向下相容的機制，就必須做驅動的更新才行，intel有直接提供更新的驅動可以使用。

https://www.intel.com.tw/content/www/tw/zh/support/articles/000054799/wireless.html

Recently, some users have reported that after replacing their wireless access point (AP) at home, their laptops are no longer able to detect the Wi-Fi network. However, other devices in their homes can still connect without any issues.

The laptops cannot even see the Wi-Fi network's SSID, making it impossible to establish a connection. Strangely, Wi-Fi connections at their workplaces or on their smartphones work fine, which adds to the confusion.

As this issue is not isolated to a single case, it raises the suspicion that the newer Wi-Fi protocol may not be compatible with older wireless network cards.

Indeed, this turns out to be the case. You can refer to the article provided for more information. The main issue is that the new AP is using the 802.11ax protocol, which is not supported by older network cards. Unfortunately, there is no backward compatibility mechanism in place. The solution is to update the drivers, and Intel provides updated drivers for this purpose.

You can find further details and instructions in the following article:

https://www.intel.com.tw/content/www/tw/zh/support/articles/000054799/wireless.html