The values I provided should set the /etc/resolv.conf for the wlan0 interface. The gateway you would want to set for your config. I typically run with a static ip on my wlan0 so I edit the connman settings manually for my environment. The other option is to do it manually or with some script that detects the loss of your usb network connection and then set resolv.conf accordingly. This does take root access, so I find it best to just add it to the connman settings.
You could check your /etc/resolv.conf on your BBAI after you experience the USB sleep mode on your laptop to see if there are any settings still in there. If not, then that might explain why you can not reach google.com when the usb interface is offline. Cheers, Jon On Mon, Jul 13, 2020 at 3:08 PM Manderson <[email protected]> wrote: > Hi Jon - thanks for your input. > > This is a snapshot of my working wlan0 > > wlan0: flags=-28605<UP,BROADCAST,RUNNING,MULTICAST,DYNAMIC> mtu 1500 > inet 192.168.1.50 netmask 255.255.255.0 broadcast 192.168.1.255 > inet6 fe80::8291:33ff:fe4a:4223 prefixlen 64 scopeid 0x20<link> > ether 80:91:33:4a:42:23 txqueuelen 1000 (Ethernet) > RX packets 20004 bytes 4482231 (4.2 MiB) > RX errors 0 dropped 375 overruns 0 frame 0 > TX packets 2130 bytes 245657 (239.8 KiB) > TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 > > I am indeed using connman -- what do those two additional settings do? > > Output of `route`: > debian ~ $ route > Kernel IP routing table > Destination Gateway Genmask Flags Metric Ref Use > Iface > default 192.168.1.1 0.0.0.0 UG 0 0 0 > wlan0 > 192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 > wlan0 > 192.168.1.1 0.0.0.0 255.255.255.255 UH 0 0 0 > wlan0 > 192.168.6.0 0.0.0.0 255.255.255.0 U 0 0 0 > usb1 > 192.168.7.0 0.0.0.0 255.255.255.0 U 0 0 0 > usb0 > 192.168.8.0 0.0.0.0 255.255.255.0 U 0 0 0 > SoftAp0 > > > Best, > Matt > > On Thursday, July 9, 2020 at 5:02:44 PM UTC-7, jonnymo wrote: >> >> I suspect your resolv.conf got set back to the default with no >> nameservers listed when the USB ethernet port went offline. >> >> How do you have your wlan0 configured? >> If you used connman, you can add the following to your connman settings: >> Ex: >> >> * IPv4.gateway=192.168.2.1 Nameservers=8.8.8.8;8.8.4.4;4.4.4.4;* >> >> Typing 'route' should show your which network device the traffic is going >> down. >> >> Also, you can test this by using ping and specifying the ethernet port to >> use: >> Ex: >> *ping -I wlan0 google.com <http://google.com>* >> >> Cheers, >> >> Jon >> >> >> On Thu, Jul 9, 2020 at 4:10 PM Dennis Lee Bieber <[email protected]> >> wrote: >> >>> On Thu, 9 Jul 2020 11:55:02 -0700 (PDT), in >>> gmane.comp.hardware.beagleboard.user Manderson >>> <matthew...> wrote: >>> >>> >Hi all, >>> > >>> >I typically take the wired approach when connecting to my Beaglebone >>> (plug >>> >in USB-C power to a port on my laptop and ssh with the 192.168.6.2 IP). >>> >>> What type of computer are you using (OS)? I ask as Windows >>> normally >>> uses 192.168.7.x, Mac the 192.168.6.x, and Linux apparently works with >>> both >>> (they are, I believe, slightly different USB<>Ethernet protocols). >>> >>> >I've noticed, however, in the past several days that my BBAI loses wlan >>> >connectivity if my host computer goes to sleep (e.g. overnight). >>> Pinging >>> >>> Odds are very good that the USB port powers off when the host >>> sleeps. >>> That means the BBAI is getting a very rude power drop -- risking file >>> system corruption, and who knows what may happen when the host wakes up >>> and >>> the BB AI reboots. >>> >>> Also, it may be that you aren't even using the WiFi connection >>> -- if >>> the host is performing the equivalent of "Internet Connection Sharing" >>> your >>> ... >>> >>> >google.com after this happens results in >>> >debian ~ $ ping google.com >>> >ping: google.com: Temporary failure in name resolution >>> >debian ~ $ ping 8.8.8.8 >>> >connect: Network is unreachable >>> >>> would be trying to go through the USB gadget (though I'd think if that >>> was >>> active before the sleep, it would reactivate after the sleep also). >>> >>> > >>> >2) If my board's wlan is dependent on my computer also being connected >>> to >>> >wifi, then would it be detrimental to power my BBAI off a wall outlet >>> and >>> >USB-C wall charger instead of plugging into my computer? Or would I not >>> >even be able to ssh into it? >>> >>> Nothing in your post confirms that you even had a WiFi >>> connection to >>> some shared router (if you had, you wouldn't be using 192.168.6.x to >>> connect to the BB AI, but instead be using an IP number -- or hostname: >>> beaglebone or beaglebone.local -- to connect using a path through the >>> router. Does your router even show the BBAI as a Wireless client? >>> >>> Even if the USB port remains powered while the host sleeps, if >>> you were >>> going via ICS (BBAI<>USB gadget<>host WiFi [or cable]<>router<>ISP), the >>> host WiFI may go down when the host sleeps, and possibly it gets a >>> different DHCP assignment on wake-up which is not being reflected in >>> routing tables for the USB gadget. >>> >>> >>> >>> -- >>> Dennis L Bieber >>> >>> -- >>> 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 [email protected]. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/beagleboard/c58fgfp0p35v399encr2d1v1i6han23eov%404ax.com >>> . >>> >> -- > 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 [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/a4631369-a8b5-40f9-aa53-e05a649029f7o%40googlegroups.com > <https://groups.google.com/d/msgid/beagleboard/a4631369-a8b5-40f9-aa53-e05a649029f7o%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. 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