On 9 January 2017 at 13:36, Shaun Crampton <sh...@cantab.net> wrote: > On Mon, 9 Jan 2017, 08:49 Michal Kazior, <michal.kaz...@tieto.com> wrote: >> On 7 January 2017 at 22:41, Shaun Crampton <sh...@cantab.net> wrote: >> > Hi, >> > >> > I'm getting regular QCA6174 firmware crashes on Ubuntu 16.10 with the >> > QCA6174 (new Dell XPS 13, which shipped with Ubuntu 16.04). Crash >> > seems to be at random, roughly every 30 minutes. After the crash, >> > wifi stops working until I turn it off and on again. >> > >> > Any help or workaround appreciated. I've copied the dmesg log in >> > below. I have the latest firmware from linux-firmware in >> > /lib/firmware. >> > >> > Please CC in me any responses. >> > >> > Thanks, >> > >> > -Shaun >> > >> > [ 3683.563419] wlp58s0: AP 00:07:26:aa:e0:45 changed bandwidth, new >> > config is 2472 MHz, width 2 (2462/0 MHz) >> >> Your AP seems to be toggling HT20 and HT40. >> >> Can you force your AP to run at HT20 at all times, please? If the >> problem ceases it'll strongly point to firmware's rate control >> becoming confused (e.g. due to driver not properly telling it how >> peer's capabilities have changes). > > I don't think my AP has that setting, is there any way to disable it at the > client side?
APs can expose this differently, e.g. mode (a/b/g/n), bandwidth (20, 40, auto), rate (54, 150, 300, 866). In any case, you want to avoid "n/ac", >54mbps, !=20mhz. You could force wpa_supplicant to run with disabe_ht=1 in the network block to force legacy 11a/b/g mode which should ignore bandwidth changes. I don't know how to force network manager (or similar) to do that though. MichaĆ _______________________________________________ ath10k mailing list ath10k@lists.infradead.org http://lists.infradead.org/mailman/listinfo/ath10k