Comment 218 for bug 1239578

Step 1) I upgraded to 14.04.1 from 13.10 using apt-get upgrade, update-manager -d.

No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 14.04.1 LTS
Release: 14.04
Codename: trusty

Step 2) Pulled driver code from GIT and built. Loaded via modprobe and added to /etc/modules too.

Step 3) After reboot, everything seems to be fine except intermediate stuck (network connectivity drop) and becomes available itself.

Linux 440s-laptop 3.13.9 #2 SMP Tue May 20 09:57:03 CDT 2014 x86_64 x86_64 x86_64 GNU/Linux

15:13:58 up 22 min, 3 users, load average: 1.33, 1.49, 1.22

also, RTT delay is quite a high for pinging directly connected router IP.

wlan2 Link encap:Ethernet HWaddr
          inet addr:10.16.0.33 Bcast:10.16.255.255 Mask:255.255.0.0
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:104458 errors:0 dropped:0 overruns:0 frame:0
          TX packets:60287 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:132596751 (132.5 MB) TX bytes:8451011 (8.4 MB)

default via 10.16.0.1 dev wlan2 proto static
10.16.0.0/16 dev wlan2 proto kernel scope link src 10.16.0.33 metric 9

64 bytes from 10.16.0.33: icmp_seq=69 ttl=64 time=5.28 ms
64 bytes from 10.16.0.33: icmp_seq=70 ttl=64 time=5.25 ms
64 bytes from 10.16.0.33: icmp_seq=71 ttl=64 time=6.28 ms
64 bytes from 10.16.0.33: icmp_seq=75 ttl=64 time=6860 ms
64 bytes from 10.16.0.33: icmp_seq=76 ttl=64 time=5863 ms
64 bytes from 10.16.0.33: icmp_seq=77 ttl=64 time=4864 ms
64 bytes from 10.16.0.33: icmp_seq=78 ttl=64 time=3865 ms
64 bytes from 10.16.0.33: icmp_seq=79 ttl=64 time=2865 ms
64 bytes from 10.16.0.33: icmp_seq=80 ttl=64 time=1868 ms
64 bytes from 10.16.0.33: icmp_seq=81 ttl=64 time=870 ms
64 bytes from 10.16.0.33: icmp_seq=82 ttl=64 time=4988 ms
64 bytes from 10.16.0.33: icmp_seq=83 ttl=64 time=3986 ms
64 bytes from 10.16.0.33: icmp_seq=84 ttl=64 time=2979 ms
64 bytes from 10.16.0.33: icmp_seq=85 ttl=64 time=1972 ms
64 bytes from 10.16.0.33: icmp_seq=86 ttl=64 time=964 ms
64 bytes from 10.16.0.33: icmp_seq=87 ttl=64 time=5074 ms
64 bytes from 10.16.0.33: icmp_seq=88 ttl=64 time=4106 ms
64 bytes from 10.16.0.33: icmp_seq=89 ttl=64 time=3099 ms
64 bytes from 10.16.0.33: icmp_seq=90 ttl=64 time=2093 ms
64 bytes from 10.16.0.33: icmp_seq=91 ttl=64 time=1085 ms
64 bytes from 10.16.0.33: icmp_seq=92 ttl=64 time=78.0 ms

Is it due to arp getting timed out ?. I see ARP timeouts.

How do I debug futher. Any help is appreciated.