Netplan replug function is incompatible with ath9k_htc module
n.curalli at domotz.com
Tue Mar 14 09:42:50 UTC 2017
we ( my work team and I ) are porting an allwinner H3 with wireless chip Atheros AR9271 to Ubuntu Core 16.
We hit the following problem about the interaction between netplan and the ath9k_htc module, controlling the chip Atheros AR9271.
If you run the following command
netplan --debug apply
or you use console-conf for setting the network interfaces we get the following messages :
** (generate:2261): DEBUG: Processing input file //etc/netplan/00-snapd-config.yaml..
** (generate:2261): DEBUG: eth0: setting default backend to 1
** (generate:2261): DEBUG: Generating output files..
** (generate:2261): DEBUG: NetworkManager: definition eth0 is not for us (backend 1)
DEBUG:netplan generated networkd configuration exists, restarting networkd
DEBUG:no netplan generated NM configuration exists
DEBUG:device lo operstate is unknown, not replugging
DEBUG:device eth0 operstate is up, not replugging
DEBUG:replug wlan0: unbinding 4-1:1.0 from /sys/bus/usb/drivers/ath9k_htc
DEBUG:replug wlan0: rebinding 4-1:1.0 to /sys/bus/usb/drivers/ath9k_htc
The last two row show two consecutive actions, one soon after the other: unbind and bind the usb device on usb hub.
The module ath9k_htc doesn't work fine in this situation: the wireless interface disappears.
Our problem can be fixed by using the same approcch used for mac80211_hwsim e mwifiex_pcie modules. We had a look at the netplan code.
Our problem is testing our simple patch before open the bug report for netplat project: the problematic file is src/netplan.
How can we repack a core snap with different code per netplan?
How long does it take to have a patch like this to be accepted in core snap code?
More information about the Snapcraft