Patchy wifi connection / High number of excessive retries

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Patchy wifi connection / High number of excessive retries

Postby tom101 on Thu Feb 14, 2013 4:45 am

Hi,

My laptop has a Intel 5300 wifi card. It works, but I find that the connection can be a little patchy. Sometimes whilst browsing the web the browser kind of sits there waiting for a while and then all of a sudden begins to load pages. I don't experience this issue using Windows on the same laptop, or using a wired connection in Mint (Cinnamon 14 32bit, by the way) so I suspect the wireless card. The laptop is around 6ft away from the wireless router. Signal strength is around 100%. I see from iwconfig that the number of excessive retries increments constantly whilst the wireless network is active. Any ideas where I should start when troubleshooting this?

Here is the result from mintwifi. When this was taken I was connected to a router that is quite far away, the signal is weaker.

Code: Select all
tom@mint /lib/firmware $ mintwifi
-------------------------
* I. scanning WIFI PCI devices...
  -- Intel Corporation Ultimate N WiFi Link 5300
      ==> PCI ID = 8086:4235
-------------------------
* II. querying ndiswrapper...
-------------------------
* III. querying iwconfig...
wlan0     IEEE 802.11abgn  ESSID:"DESARROLLO" 
          Mode:Managed  Frequency:2.437 GHz  Access Point: 00:50:7F:63:D9:C1   
          Bit Rate=1 Mb/s   Tx-Power=15 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=29/70  Signal level=-81 dBm 
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:321  Invalid misc:3376   Missed beacon:0

lo        no wireless extensions.

eth0      no wireless extensions.

-------------------------
* IV. querying ifconfig...
eth0      Link encap:Ethernet  HWaddr d4:be:d9:70:e9:58 
          inet addr:192.168.1.58  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::d6be:d9ff:fe70:e958/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:9132 errors:0 dropped:0 overruns:0 frame:0
          TX packets:7742 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:6135032 (6.1 MB)  TX bytes:1181991 (1.1 MB)
          Interrupt:20 Memory:f7c00000-f7c20000

lo        Link encap:Local Loopback 
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:5184 errors:0 dropped:0 overruns:0 frame:0
          TX packets:5184 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:518658 (518.6 KB)  TX bytes:518658 (518.6 KB)

wlan0     Link encap:Ethernet  HWaddr 00:21:6a:a6:34:06 
          inet addr:192.168.1.11  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::221:6aff:fea6:3406/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:92155 errors:0 dropped:0 overruns:0 frame:0
          TX packets:74928 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:84401959 (84.4 MB)  TX bytes:13938968 (13.9 MB)

-------------------------
* V. querying DHCP...
Rather than invoking init scripts through /etc/init.d, use the service(8)
utility, e.g. service smbd reload

Since the script you are attempting to invoke has been converted to an
Upstart job, you may also use the reload(8) utility, e.g. reload smbd
RTNETLINK answers: File exists
-------------------------
* VI. querying nslookup google.com...
Server:      80.58.61.250
Address:   80.58.61.250#53

Non-authoritative answer:
Name:   google.com
Address: 173.194.45.69
Name:   google.com
Address: 173.194.45.68
Name:   google.com
Address: 173.194.45.71
Name:   google.com
Address: 173.194.45.64
Name:   google.com
Address: 173.194.45.67
Name:   google.com
Address: 173.194.45.78
Name:   google.com
Address: 173.194.45.72
Name:   google.com
Address: 173.194.45.70
Name:   google.com
Address: 173.194.45.66
Name:   google.com
Address: 173.194.45.73
Name:   google.com
Address: 173.194.45.65
tom101
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