Certain Atheros wifi NIC drivers failing to operate in HT40 with DD-WRT
|Reported by:||tatsuya46||Owned by:||Somebody|
|Keywords:||drivers, HT40, turbo, 40MHz, atheros, HT20, 65mbps, wireless, 20MHz||Cc:|
With all builds of DD-WRT including latest r16214 certain wifi card drivers, being specific, most if not all of the current Atheros drivers for all Atheros wireless NICs in all laptops, will not operate in HT40 mode with DD-WRT. N 150 cards get slowed down to 65Mbps and N 300 get slowed down to 130Mbps. This is with any reg domain and any channel and of coarse channel width on turbo 40MHz. We have no choice but to downgrade to the latest Microsoft driver in order to get the proper link rates.
This is present with the DIR-825, DIR-615, WNDR3700 and probably several more units. The stock firmware connects all wireless NICs with ANY drivers at the proper rates and never drops.
The newer drivers are detecting a problem with the DD-WRT AP and forcing down to HT20 mode, only DD-WRT is doing this with modern Atheros NIC drivers, not stock firmware.