Hi Stephane, Yes WL18xx does have a power save mode which is on by default. It can be disabled with
echo 0 > /sys/kernel/debug/ieee80211/phy0/wlcore/sleep_auth The SW interrupt message means that the linux driver did not get a response from the WL18xx firmware within a defined time and so represents the fact that WL18xx has gone off into the weeds. It is often related to power management changes in the MMC driver. Iain On Sunday, November 6, 2016 at 10:48:21 PM UTC, Stephane Charette wrote: > > Does the BBGW or the wifi hardware on the BBGW have some sort of power > saving mode? > > Something interesting I noticed about those "*wlcore: ERROR SW watchdog > interrupt received! starting recovery*" messages that fill up my serial > console: I get one almost every time the BBGW sends out a packet. This > corresponds to my ~95% packet loss. > > But if I run this command on my BBGW to frequently ping the wifi router, I > never see the error message, and wifi networking works correctly: > > sudo ping -i 0.1 192.168.1.1 > > If I increase the length of time to 0.2 seconds or longer, then the > problem happens and I lose wifi connectivity. But as long as there is a > steady stream of packets every 0.1 seconds or shorter, wifi works > perfectly. Which is why I was wondering -- could the wifi hardware be > trying to go into some sort of power saving mode? > > $ uname -a > Linux beaglebone 4.4.27-ti-r63 #1 SMP Thu Nov 3 19:58:15 UTC 2016 armv7l > GNU/Linux > > Stéphane > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/54ec7428-9446-4111-9403-97166a06f874%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
