and here the errors log related to the network interface which never connect again.
It's seems to be related to a DHCP error ?
Code:
ug 26 13:43:12 X1Carbon avahi-daemon[2327]: Withdrawing address record for 10.189.136.155 on usb0.
Aug 26 13:43:12 X1Carbon avahi-daemon[2327]: Leaving mDNS multicast group on interface usb0.IPv4 with address 10.189.136.155.
Aug 26 13:43:12 X1Carbon avahi-daemon[2327]: Interface usb0.IPv4 no longer relevant for mDNS.
Aug 26 13:43:12 X1Carbon NetworkManager[2308]: <info> Writing DNS information to /sbin/resolvconf
Aug 26 13:43:12 X1Carbon whoopsie[2310]: [13:43:12] Cannot reach: https://daisy.ubuntu.com
Aug 26 13:43:12 X1Carbon dnsmasq[3821]: setting upstream servers from DBus
Aug 26 13:43:12 X1Carbon NetworkManager[2308]: status: Unable to connect to Upstart: Failed to connect to socket /com/ubuntu/upstart: Connection refused
Aug 26 13:43:12 X1Carbon NetworkManager[2308]: <info> NetworkManager state is now DISCONNECTED
Aug 26 13:43:12 X1Carbon dbus[2442]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service'
Aug 26 13:43:12 X1Carbon systemd[1]: Starting Network Manager Script Dispatcher Service...
Aug 26 13:43:12 X1Carbon dbus[2442]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
Aug 26 13:43:12 X1Carbon systemd[1]: Started Network Manager Script Dispatcher Service.
Aug 26 13:43:12 X1Carbon nm-dispatcher: Dispatching action 'down' for usb0
Aug 26 13:43:13 X1Carbon NetworkManager[2308]: <info> Activation (usb0) starting connection 'Wired connection 1'
Aug 26 13:43:13 X1Carbon NetworkManager[2308]: <info> Activation (usb0) Stage 1 of 5 (Device Prepare) scheduled...
Aug 26 13:43:13 X1Carbon NetworkManager[2308]: <info> Activation (usb0) Stage 1 of 5 (Device Prepare) started...
Aug 26 13:43:13 X1Carbon NetworkManager[2308]: <info> (usb0): device state change: disconnected -> prepare (reason 'none') [30 40 0]
Aug 26 13:43:13 X1Carbon NetworkManager[2308]: <info> NetworkManager state is now CONNECTING
Aug 26 13:43:13 X1Carbon NetworkManager[2308]: <info> Activation (usb0) Stage 2 of 5 (Device Configure) scheduled...
Aug 26 13:43:13 X1Carbon NetworkManager[2308]: <info> Activation (usb0) Stage 1 of 5 (Device Prepare) complete.
Aug 26 13:43:13 X1Carbon NetworkManager[2308]: <info> Activation (usb0) Stage 2 of 5 (Device Configure) starting...
Aug 26 13:43:13 X1Carbon NetworkManager[2308]: <info> (usb0): device state change: prepare -> config (reason 'none') [40 50 0]
Aug 26 13:43:13 X1Carbon NetworkManager[2308]: <info> Activation (usb0) Stage 2 of 5 (Device Configure) successful.
Aug 26 13:43:13 X1Carbon NetworkManager[2308]: <info> Activation (usb0) Stage 3 of 5 (IP Configure Start) scheduled.
Aug 26 13:43:13 X1Carbon NetworkManager[2308]: <info> Activation (usb0) Stage 2 of 5 (Device Configure) complete.
Aug 26 13:43:13 X1Carbon NetworkManager[2308]: <info> Activation (usb0) Stage 3 of 5 (IP Configure Start) started...
Aug 26 13:43:13 X1Carbon NetworkManager[2308]: <info> (usb0): device state change: config -> ip-config (reason 'none') [50 70 0]
Aug 26 13:43:13 X1Carbon NetworkManager[2308]: <info> Activation (usb0) Beginning DHCPv4 transaction (timeout in 45 seconds)
Aug 26 13:43:13 X1Carbon NetworkManager[2308]: <info> dhclient started with pid 28828
Aug 26 13:43:13 X1Carbon NetworkManager[2308]: <info> Activation (usb0) Stage 3 of 5 (IP Configure Start) complete.
Aug 26 13:43:13 X1Carbon NetworkManager[2308]: <info> (usb0): DHCPv4 state changed nbi -> preinit
Aug 26 13:43:13 X1Carbon dhclient: DHCPREQUEST of 10.189.136.155 on usb0 to 255.255.255.255 port 67 (xid=0x4c387594)
Aug 26 13:43:19 X1Carbon dhclient: message repeated 2 times: [ DHCPREQUEST of 10.189.136.155 on usb0 to 255.255.255.255 port 67 (xid=0x4c387594)]
Aug 26 13:43:25 X1Carbon dhclient: DHCPDISCOVER on usb0 to 255.255.255.255 port 67 interval 3 (xid=0x4b396e78)
Aug 26 13:43:28 X1Carbon dhclient: DHCPDISCOVER on usb0 to 255.255.255.255 port 67 interval 3 (xid=0x4b396e78)
Aug 26 13:43:31 X1Carbon dhclient: DHCPDISCOVER on usb0 to 255.255.255.255 port 67 interval 7 (xid=0x4b396e78)
Aug 26 13:43:38 X1Carbon dhclient: DHCPDISCOVER on usb0 to 255.255.255.255 port 67 interval 9 (xid=0x4b396e78)
Aug 26 13:43:52 X1Carbon kernel: [21716.601603] intel_powerclamp: Stop forced idle injection
Aug 26 13:43:58 X1Carbon NetworkManager[2308]: <warn> (usb0): DHCPv4 request timed out.
Aug 26 13:43:58 X1Carbon NetworkManager[2308]: <info> (usb0): canceled DHCP transaction, DHCP client pid 28828
Aug 26 13:43:58 X1Carbon NetworkManager[2308]: <info> Activation (usb0) Stage 4 of 5 (IPv4 Configure Timeout) scheduled...
Aug 26 13:43:58 X1Carbon NetworkManager[2308]: <info> Activation (usb0) Stage 4 of 5 (IPv4 Configure Timeout) started...
Aug 26 13:43:58 X1Carbon NetworkManager[2308]: <info> (usb0): device state change: ip-config -> failed (reason 'ip-config-unavailable') [70 120 5]
Aug 26 13:43:58 X1Carbon NetworkManager[2308]: <info> NetworkManager state is now DISCONNECTED
Does anybody can confirm the same issue?
$ uname -a
Linux xxx 3.19.0-26-generic #28-Ubuntu SMP Tue Aug 11 14:16:32 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
$ cat /etc/debian_version
jessie/sid
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 15.04
Release: 15.04
Codename: vivid