From mboxrd@z Thu Jan 1 00:00:00 1970 From: UsuarioAnonimo Date: Thu, 25 Aug 2016 12:27:22 -0700 Subject: [ath9k-devel] ath9k_htc kernel driver regression affecting throughput Message-ID: <1472153242.25699.0@smtp.gmail.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: ath9k-devel@lists.ath9k.org My primary conntection to the internet has been the Alfa AWUS036NHA wireless adapter which uses the Atheros AR9271 802.11n chipset. The applicable linux driver/module and firmware is ath9k_htc. Ever since the upgrade from linux kernel 4.3.x to 4.4.x the throughput of the adapter chipset has been severely affected making the adapter basically unusable. It will still readily connect to a distant access point. But instead of previously giving me steady and reliable download throughput in the range of 1/3 Mb/sec to almost a full Mb/sec with no packet loss, now after a minute or two it will very quickly slow and stall down to 1 or 2 kbs/sec and 100% packet loss. If I reconnect, sometimes I will get good throughput for another minute or two before it stalls to nothing again. I know this is a software issue, not hardware, because I have other distros installed on the same computer or another computer with linux kernel 4.3.x installed and the wifi adapter works beautifully as before. I also now strongly suspect that this is not firmware related, but kernel driver related, that there was a regression or bug introduced into one of the .ko driver modules (whether ath9k, ath9k_htc, or other) in kernel 4.4.x and it is still present in linux kernel 4.7.x (Arch and Manaro linux). I am surprised this basic functionality in managed mode has persisted for so long without other people noticing it or addressing it. I've been banging my head up against a wall for 6 months now with failed workarounds. And finally have settled on using other wifi adapters that have much lower throughput than the Atheros chipset, but which I can work with to some degree. If anybody is willing or able to address this, I would be happy to run any tests and send any log output to try to help solve this. Thank you for your attention. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.ath9k.org/pipermail/ath9k-devel/attachments/20160825/500968c1/attachment.htm