Not able to connect to my network since upgrade 2 days ago

Hello,
1 of my machines is unable to connect wirelessly to my network now.
It usually is on NetworkManager, and fails at the "setting address" stage.
I switched to manual setup to see where it fails and this I what I have:
ip link set dev wl works
rfkill indicates no block
wpa_supplican connects
BUT
that's where it stops, I cannot get a DHCP lease with either dhclient or dhcpcd.
They both timeout with nothing.
Strangely when I look at my router's log file, I see the requests coming but they are a bit strange, requests coming from this machine are as this:
Jun 28 22:19:28 tomato daemon.info dnsmasq-dhcp[898]: DHCPDISCOVER(br0) 192.168.1.114 <MAC ADDRESS>
Jun 28 22:19:28 tomato daemon.info dnsmasq-dhcp[898]: DHCPOFFER(br0) 192.168.1.114 <MAC ADDRESS>
Jun 28 22:19:44 tomato daemon.info dnsmasq-dhcp[898]: DHCPDISCOVER(br0) 192.168.1.114 <MAC ADDRESS>
Jun 28 22:19:44 tomato daemon.info dnsmasq-dhcp[898]: DHCPOFFER(br0) 192.168.1.114 <MAC ADDRESS>
Jun 28 22:19:51 tomato daemon.info dnsmasq-dhcp[898]: DHCPDISCOVER(br0) 192.168.1.114 <MAC ADDRESS>
Jun 28 22:19:51 tomato daemon.info dnsmasq-dhcp[898]: DHCPOFFER(br0) 192.168.1.114 <MAC ADDRESS>
Jun 28 22:19:59 tomato daemon.info dnsmasq-dhcp[898]: DHCPDISCOVER(br0) 192.168.1.114 <MAC ADDRESS>
Jun 28 22:19:59 tomato daemon.info dnsmasq-dhcp[898]: DHCPOFFER(br0) 192.168.1.114 <MAC ADDRESS>
While for machines that connect it looks like this:
Jun 28 22:13:41 tomato daemon.info dnsmasq-dhcp[480]: DHCPDISCOVER(br0) 192.168.1.108 <OTHER MAC ADDRESS>
Jun 28 22:13:41 tomato daemon.info dnsmasq-dhcp[480]: DHCPOFFER(br0) 192.168.1.108 <OTHER MAC ADDRESS>
Jun 28 22:13:41 tomato daemon.info dnsmasq-dhcp[480]: DHCPREQUEST(br0) 192.168.1.108 <OTHER MAC ADDRESS>
Jun 28 22:13:41 tomato daemon.info dnsmasq-dhcp[480]: DHCPACK(br0) 192.168.1.108 <OTHER MAC ADDRESS> <HOSTNAME>
What does the one having issue not send the DHCPREQUEST?
I assume the ACK is coming from the router in exchange for the REQUEST.
Thanks!

Hi. I had the same issue.
In my case it was caused by this bug: https://bugzilla.kernel.org/show_bug.cgi?id=78581
I solved it by downgrading the kernel, but there is also a workaround: setting the modprobe to "options ath9k_htc nohwcrypt=1" (I haven't yet tested this).
EDIT: The workaround works fine, I've just tested it. Simply create a file named /etc/modprobe.d/ath9k_htc.conf with the line "options ath9k_htc nohwcrypt=1", then reload the ath9k_htc module.
Last edited by fg (2014-07-01 12:02:01)

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