Ubuntu
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  1. Bug #836250
  2. Comment #54

Comment 54 for bug 836250

Revision history for this message
DDC (coquet) wrote : Re: [Oneiric] Intel Corporation Centrino Ultimate-N 6300 poor networking, packet loss and very slow Lenovo X201 and T500 laptops

I have a Intel Corporation Centrino Wireless-N 1000 (8086:0084) in a Thinkpad x220. In 11.04, I had good performance once I added "options iwlagn 11n_disable=1". With 11.10 i'm using the same configuration. The connection is stable, but the performance is noticeably worse.

For example, I'm currently scping a file to another host on the network at 1.2MB/s. Trying to do anything else at the same time is pretty painful.

~$ ping fw
PING fw.lan (172.16.88.101) 56(84) bytes of data.
64 bytes from fw.lan (172.16.88.101): icmp_req=1 ttl=64 time=1009 ms
64 bytes from fw.lan (172.16.88.101): icmp_req=2 ttl=64 time=1173 ms
64 bytes from fw.lan (172.16.88.101): icmp_req=3 ttl=64 time=2277 ms
64 bytes from fw.lan (172.16.88.101): icmp_req=4 ttl=64 time=1669 ms
64 bytes from fw.lan (172.16.88.101): icmp_req=5 ttl=64 time=1927 ms
...
--- fw.lan ping statistics ---
92 packets transmitted, 92 received, 0% packet loss, time 165346ms
rtt min/avg/max/mdev = 411.023/1158.280/2958.334/407.009 ms, pipe 3