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Old 01-21-2010, 02:26 PM   #1
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WLAN connection fails after a few seconds - RALINK RT2860/Ubuntu9.10

Hello, I am trying to find help with my problem to get a reasonable connection of my desktop Medion Akoya P7700 D MD8848, which has a built in Ralink RT2860 card.

The HW is working, I have installed dual-boot on the computer. Under Vista the connection works without problems. And under Vista I was able to identify the built-in WLAN chipset.

However starting up Linux, everthing is fine only for the first couple of kB. The transfer starts at good speed - and then it gets stuck. Sometimes it can be repaired for another few seconds by de-activating the wireless network and then re-activating it. But it works only in 1 out of 10 cases.

Here are a few simple Linux commands I tried to get a status, but I honestly admit - I have no clue of the details of Linux or WLAN under Linux.

pkempf@Aldi2009:~$ lspci -n
00:00.0 0600: 8086:29c0 (rev 02)
00:01.0 0604: 8086:29c1 (rev 02)
00:19.0 0200: 8086:10c0 (rev 02)
00:1a.0 0c03: 8086:2937 (rev 02)
00:1a.1 0c03: 8086:2938 (rev 02)
00:1a.2 0c03: 8086:2939 (rev 02)
00:1a.7 0c03: 8086:293c (rev 02)
00:1b.0 0403: 8086:293e (rev 02)
00:1d.0 0c03: 8086:2934 (rev 02)
00:1d.1 0c03: 8086:2935 (rev 02)
00:1d.2 0c03: 8086:2936 (rev 02)
00:1d.7 0c03: 8086:293a (rev 02)
00:1e.0 0604: 8086:244e (rev 92)
00:1f.0 0601: 8086:2912 (rev 02)
00:1f.2 0106: 8086:2922 (rev 02)
00:1f.3 0c05: 8086:2930 (rev 02)
01:00.0 0300: 10de:0621 (rev a1)
02:02.0 0c00: 1106:3044 (rev c0)

pkempf@Aldi2009:~$ lsusb
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 008 Device 002: ID 04f2:0420 Chicony Electronics Co., Ltd
Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 002: ID 058f:6360 Alcor Micro Corp. Multimedia Card Reader
Bus 001 Device 003: ID 13d3:3247 IMC Networks 802.11 n/g/b Wireless LAN Adapter
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

pkempf@Aldi2009:~$ iwconfig
lo no wireless extensions.

eth0 no wireless extensions.

wmaster0 no wireless extensions.

wlan0 IEEE 802.11bgn ESSID:"freebox"
Mode:Managed Frequency:2.462 GHz Access Point: 06:1B:AB:CC:2B:70
Bit Rate=24 Mb/s Tx-Power=12 dBm
Retry long limit:7 RTS thrff Fragment thrff
Power Managementn
Link Quality=70/70 Signal level=-183 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0

pkempf@Aldi2009:~$ iwconfig -v
iwconfig Wireless-Tools version 29
Compatible with Wireless Extension v11 to v22.

Kernel Currently compiled with Wireless Extension v22.

wlan0 Recommend Wireless Extension v21 or later,
Currently compiled with Wireless Extension v22.

I also include the results of a ping, which I did while the transfer was stuck. Don't know why a ping works, while any other internet activity is stuck.

--- ping statistics ---
9 packets transmitted, 9 received, +14 duplicates, 0% packet loss, time 8012ms
rtt min/avg/max/mdev = 44.746/48.529/54.415/2.934 ms

I would be happy, if someone told me what other diagnostic I should do, in order to deliver some reasonable description of the problem.

Thanks for any help!


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