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On Kubuntu 17.04 Zesty i keep getting error 21 (net::ERR_NETWORK_CHANGED). After refreshing pages are loaded well. My downloads are also interrupted because of this error. On Firefox everything is just OK.

What can be reason of this error? I don't think it is caused by WiFi driver, because on other web-browesers i get no errors.

sudo apt list google-chrome-stable 

google-chrome-stable/stable,now 56.0.2924.87-1 amd64 [installed]







lspci | grep -i network

02:00.0 Network controller: Qualcomm Atheros QCA9565 / AR9565 Wireless Network Adapter (rev 01)





sudo modprobe ath9k && dmesg | grep ath

[   20.522563] ath: phy0: WB335 1-ANT card detected

[   20.522564] ath: phy0: Set BT/WLAN RX diversity capability

[   20.532780] ath: phy0: Enable LNA combining

[   20.534814] ath: phy0: ASPM enabled: 0x43

[   20.534817] ath: EEPROM regdomain: 0x6a

[   20.534818] ath: EEPROM indicates we should expect a direct regpair map

[   20.534819] ath: Country alpha2 being used: 00

[   20.534820] ath: Regpair used: 0x6a

[   20.731920] usbcore: registered new interface driver ath3k

[   20.895278] ath9k 0000:02:00.0 wlo1: renamed from wlan0

[   22.460435] audit: type=1400 audit(1487757197.106:9): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/lib/telepathy/mission-control-5" pid=758 comm="apparmor_parser"

[   22.460438] audit: type=1400 audit(1487757197.106:10): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/lib/telepathy/telepathy-*" pid=758 comm="apparmor_parser"

[   22.460440] audit: type=1400 audit(1487757197.106:11): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/lib/telepathy/telepathy-*//pxgsettings" pid=758 comm="apparmor_parser"

[   87.919856] ath: EEPROM regdomain: 0x8268

[   87.919857] ath: EEPROM indicates we should expect a country code

[   87.919858] ath: doing EEPROM country->regdmn map search

[   87.919859] ath: country maps to regdmn code: 0x37

[   87.919860] ath: Country alpha2 being used: PL

[   87.919860] ath: Regpair used: 0x37

[   87.919861] ath: regdomain 0x8268 dynamically updated by country IE

[ 1269.886049] ath: phy0: ASPM enabled: 0x43

[ 1274.311544] ath: EEPROM regdomain: 0x8268

[ 1274.311546] ath: EEPROM indicates we should expect a country code

[ 1274.311547] ath: doing EEPROM country->regdmn map search

[ 1274.311547] ath: country maps to regdmn code: 0x37

[ 1274.311548] ath: Country alpha2 being used: PL

[ 1274.311549] ath: Regpair used: 0x37

[ 1274.311550] ath: regdomain 0x8268 dynamically updated by country I

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Are you using Docker? Do you have Docker networks? Try removing them (except for bridge, host and none). That fixed it for me.

I'm using Kubuntu 16.10 on a Dell Inspiron 13 (5000 series, Intel Corporation Wireless 3165 (rev 79)). This issue used to happen with both IPv4 and IPv6 networks, and both wired and wireless.

You can remove all unused Docker networks with the command:

docker network prune