Weird DHCP Problems in sys-net (Qubes 3.2)

[na...@riseup.net]

Hello,

a friend of mine updated recently from Q3.1 to Q3.2. Since then he has weird
issues with connecting to the internet. It looks like sys-net is not able to
get an IP-address via DHCP. If he sets up a manual connection with fixed
IP-addresses it works. We unsuccessfully tried to hunt down the problems
source.
- He tried to change the template on which sys-net is based from Fedora
23 to
Fedora 24 (from the official Qubes repository)
- He tried out to use different kernels: 4.4.11-11 and 4.4.38-11
- It works on the same machine with a xubuntu-live-system.
- Here is a log from a DHCP attempt:
--------------------------------------------------------------------------------
[user@sys-net Documents]$ cat NM_log.txt
-- Logs begin at Mon 2017-01-30 13:53:38 CET. --
Jan 31 00:09:03 sys-net dhclient[1181]: DHCPDISCOVER on wlp0s1 to
255.255.255.255 port 67 interval 20 (xid=0x40ab3d7d)
Jan 31 00:09:07 sys-net dhclient[1181]: receive_packet failed on wlp0s1:
Network is down
Jan 31 00:09:07 sys-net NetworkManager[540]: <info> WiFi hardware radio
set disabled
Jan 31 00:09:07 sys-net NetworkManager[540]: <info> (wlp0s1): device
state change: IP-config -> unavailable (reason 'none') [70 20 0]
Jan 31 00:09:07 sys-net NetworkManager[540]: <info> (wlp0s1): canceled
DHCP transaction, DHCP client pid 1181
Jan 31 00:09:07 sys-net NetworkManager[540]: <info> (wlp0s1): DHCPv4
state changed unknown -> done
Jan 31 00:09:07 sys-net NetworkManager[540]: <info> NetworkManager
state is now DISCONNECTED
Jan 31 00:09:07 sys-net NetworkManager[540]: <info> WiFi now disabled
by radio killswitch
Jan 31 00:09:07 sys-net NetworkManager[540]: <warn> Failed to
GDBus.Error:fi.w1.wpa_supplicant1.NotConnected: This interface is not
connected: disconnect.
Jan 31 00:09:07 sys-net NetworkManager[540]: <warn> Failed to
GDBus.Error:fi.w1.wpa_supplicant1.NotConnected: This interface is not
connected: disconnect.
Jan 31 00:09:29 sys-net NetworkManager[540]: <info> WiFi hardware radio
set enabled
Jan 31 00:09:30 sys-net NetworkManager[540]: <info> WiFi now enabled by
radio killswitch
Jan 31 00:09:30 sys-net NetworkManager[540]: <info> (wlp0s1) supports 5
scan SSIDs
Jan 31 00:09:30 sys-net NetworkManager[540]: <info> (wlp0s1):
supplicant interface state: starting -> ready
Jan 31 00:09:30 sys-net NetworkManager[540]: <info> (wlp0s1): device
state change: unavailable -> disconnected (reason
'supplicant-available') [20 30 42]
Jan 31 00:09:32 sys-net NetworkManager[540]: <info> (wlp0s1):
supplicant interface state: ready -> inactive
Jan 31 00:09:39 sys-net NetworkManager[540]: <info> (wlp0s1):
Activation: starting connection 'Hide&Seek'
(8d633039-62bf-4625-8639-b23b318c13ff)
Jan 31 00:09:39 sys-net NetworkManager[540]: <info> (wlp0s1): device
state change: disconnected -> prepare (reason 'none') [30 40 0]
Jan 31 00:09:39 sys-net NetworkManager[540]: <info> NetworkManager
state is now CONNECTING
Jan 31 00:09:39 sys-net NetworkManager[540]: <info> (wlp0s1): device
state change: prepare -> config (reason 'none') [40 50 0]
Jan 31 00:09:39 sys-net NetworkManager[540]: <info> (wlp0s1):
Activation: (wifi) connection 'Hide&Seek' has security, and secrets
exist. No new secrets needed.
Jan 31 00:09:39 sys-net NetworkManager[540]: <info> Config: added
'ssid' value 'Hide&Seek'
Jan 31 00:09:39 sys-net NetworkManager[540]: <info> Config: added
'scan_ssid' value '1'
Jan 31 00:09:39 sys-net NetworkManager[540]: <info> Config: added
'key_mgmt' value 'WPA-PSK'
Jan 31 00:09:39 sys-net NetworkManager[540]: <info> Config: added 'psk'
value '<omitted>'
Jan 31 00:09:39 sys-net NetworkManager[540]: <info> Config: set
interface ap_scan to 1
Jan 31 00:09:39 sys-net NetworkManager[540]: <info> (wlp0s1):
supplicant interface state: inactive -> associating
Jan 31 00:09:39 sys-net NetworkManager[540]: <info> (wlp0s1):
supplicant interface state: associating -> associated
Jan 31 00:09:40 sys-net NetworkManager[540]: <info> (wlp0s1):
supplicant interface state: associated -> completed
Jan 31 00:09:40 sys-net NetworkManager[540]: <info> (wlp0s1):
Activation: (wifi) Stage 2 of 5 (Device Configure) successful.
Connected to wireless network 'Hide&Seek'.
Jan 31 00:09:40 sys-net NetworkManager[540]: <info> (wlp0s1): device
state change: config -> IP-config (reason 'none') [50 70 0]
Jan 31 00:09:40 sys-net NetworkManager[540]: <info> Activation (wlp0s1)
Beginning DHCPv4 transaction (timeout in 45 seconds)
Jan 31 00:09:40 sys-net NetworkManager[540]: <info> dhclient started
with pid 1503
Jan 31 00:09:40 sys-net dhclient[1503]: DHCPDISCOVER on wlp0s1 to
255.255.255.255 port 67 interval 6 (xid=0xf3604a3b)
Jan 31 00:09:46 sys-net dhclient[1503]: DHCPDISCOVER on wlp0s1 to
255.255.255.255 port 67 interval 12 (xid=0xf3604a3b)
Jan 31 00:09:58 sys-net dhclient[1503]: DHCPDISCOVER on wlp0s1 to
255.255.255.255 port 67 interval 16 (xid=0xf3604a3b)
Jan 31 00:10:14 sys-net dhclient[1503]: DHCPDISCOVER on wlp0s1 to
255.255.255.255 port 67 interval 19 (xid=0xf3604a3b)
Jan 31 00:10:25 sys-net NetworkManager[540]: <warn> (wlp0s1): DHCPv4
request timed out.
Jan 31 00:10:25 sys-net NetworkManager[540]: <info> (wlp0s1): DHCPv4
state changed unknown -> timeout
Jan 31 00:10:25 sys-net NetworkManager[540]: <info> (wlp0s1): canceled
DHCP transaction, DHCP client pid 1503
Jan 31 00:10:25 sys-net NetworkManager[540]: <info> (wlp0s1): DHCPv4
state changed timeout -> done
Jan 31 00:10:25 sys-net NetworkManager[540]: <info> (wlp0s1): device
state change: IP-config -> failed (reason 'IP-config-unavailable') [70
120 5]
Jan 31 00:10:25 sys-net NetworkManager[540]: <info> NetworkManager
state is now DISCONNECTED
Jan 31 00:10:25 sys-net NetworkManager[540]: <warn> (wlp0s1):
Activation: failed for connection 'Hide&Seek'
Jan 31 00:10:25 sys-net NetworkManager[540]: <info> (wlp0s1): device
state change: failed -> disconnected (reason 'none') [120 30 0]
Jan 31 00:10:25 sys-net NetworkManager[540]: <warn> Connection
disconnected (reason -3)
Jan 31 00:10:25 sys-net NetworkManager[540]: <info> (wlp0s1):
supplicant interface state: completed -> disconnected
--------------------------------------------------------------------------------

Do you have any ideas how to solve this problems?

Thanks :)

[raah...@gmail.com]

have you tried to deleting the sys-net and recreating it?