Comment 25 for bug 215802

System monitor's connection graph looks more solid in Karmic than in Jaunty, with smaller gaps. But I am feeling lower transfer rates on local network. Its only a feeling, I did not measure it before updating, sorry. Now, for large files, on the same room, I get an average of 2MB/s receiving and 1MB/s sending. Is it ok?

Some data:

1) indoors, same room, 2 meters away

wlan0 IEEE 802.11bg ESSID:"casinha"
          Mode:Managed Frequency:2.462 GHz Access Point: 00:13:46:11:08:68
          Bit Rate=36 Mb/s Tx-Power=20 dBm
          Retry long limit:7 RTS thr:off Fragment thr:off
          Encryption key:E540-ECB2-633E-4859-B587-BB96-5906-4B30-05B4-0F1C-B3BF-40DA-34B4-67A8-F724-3E17 [2]
          Power Management:off
          Link Quality=70/70 Signal level=-19 dBm
          Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
          Tx excessive retries:0 Invalid misc:0 Missed beacon:0

Bit rate setting is auto, but it does not go 54Mb/s. If I force it I have connection issues. My signal level deviates between -22 and -17 dBm. No packet loss:

PING roteador.localdomain (192.168.0.1) 56(84) bytes of data.
64 bytes from roteador.localdomain (192.168.0.1): icmp_seq=1 ttl=127 time=1.73 ms
64 bytes from roteador.localdomain (192.168.0.1): icmp_seq=2 ttl=127 time=2.96 ms
...
^C
--- roteador.localdomain ping statistics ---
10 packets transmitted, 10 received, 0% packet loss, time 9015ms
rtt min/avg/max/mdev = 1.146/1.728/2.968/0.559 ms

2) indoors, 2 walls, 10 meters away (I couldn't connect from this same spot with Jaunty.)

wlan0 IEEE 802.11bg ESSID:"casinha"
          Mode:Managed Frequency:2.462 GHz Access Point: 00:13:46:11:08:68
          Bit Rate=18 Mb/s Tx-Power=20 dBm
          Retry long limit:7 RTS thr:off Fragment thr:off
          Encryption key:E540-ECB2-633E-4859-B587-BB96-5906-4B30-05B4-0F1C-B3BF-40DA-34B4-67A8-F724-3E17 [2]
          Power Management:off
          Link Quality=67/70 Signal level=-43 dBm
          Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
          Tx excessive retries:0 Invalid misc:0 Missed beacon:0

Bit rate is adapting to signal level, with deviates from -43 to -42 dBm. But I get packet loss:

PING roteador.localdomain (192.168.0.1) 56(84) bytes of data.
64 bytes from roteador.localdomain (192.168.0.1): icmp_seq=1 ttl=127 time=1.53 ms
64 bytes from roteador.localdomain (192.168.0.1): icmp_seq=2 ttl=127 time=1.70 ms
64 bytes from roteador.localdomain (192.168.0.1): icmp_seq=3 ttl=127 time=1.46 ms
64 bytes from roteador.localdomain (192.168.0.1): icmp_seq=5 ttl=127 time=1.58 ms
64 bytes from roteador.localdomain (192.168.0.1): icmp_seq=6 ttl=127 time=1.61 ms
64 bytes from roteador.localdomain (192.168.0.1): icmp_seq=7 ttl=127 time=2.18 ms
64 bytes from roteador.localdomain (192.168.0.1): icmp_seq=8 ttl=127 time=7.75 ms
64 bytes from roteador.localdomain (192.168.0.1): icmp_seq=9 ttl=127 time=2.32 ms
64 bytes from roteador.localdomain (192.168.0.1): icmp_seq=10 ttl=127 time=1.53 ms
^C
--- roteador.localdomain ping statistics ---
10 packets transmitted, 9 received, 10% packet loss, time 9017ms
rtt min/avg/max/mdev = 1.461/2.411/7.757/1.912 ms

----

So things are better in Karmic, but not 100% for me, yet.

My router is a DLink DI-524 and my card is ID 0bda:8189 Realtek Semiconductor Corp. RTL8187B Wireless 802.11g 54Mbps Network Adapter.

Thanks.