RT2500 PCI: Performance drops of during filetransfer

Live forum: http://rt2x00.serialmonkey.com/viewtopic.php?t=6186

joseg

22-10-2011 10:28:35

Hi,

i experience a strange problem. My link starts up with 54 mbit and i have no problem saturating my DSL connection. After a while my connection speed drops to 2 mbit, but iwconfig still shows 54 mbit.

wlan0 IEEE 802.11bg ESSID"asdf"
ModeManaged Frequency2.452 GHz Access Point aaaaaaaaaaaa
Bit Rate=54 Mb/s Tx-Power=20 dBm
Retry long limit7 RTS throff Fragment throff
Encryption keyoff
Power Managementoff
Link Quality=52/70 Signal level=-58 dBm
Rx invalid nwid0 Rx invalid crypt0 Rx invalid frag0
Tx excessive retries186 Invalid misc17956 Missed beacon0

I see in my router interface that the connection dropped to 2 mbit. So it doesn't seem to be the problem i found while googling that the card itself drops to 1 mbit. Changing the bitrate doesn't help, but bringing the interface down and up again helps. I'm suspecting that it's probably caused by Tx excessive retries186 and Invalid misc17956. Especially Invalid misc grows rapidly when i'm transferring data.

2.6.38-11-generic
rt2500pci 27422 0
rt2x00pci 14322 1 rt2500pci
rt2x00lib 49235 2 rt2500pci,rt2x00pci
mac80211 294370 2 rt2x00pci,rt2x00lib
cfg80211 178528 2 rt2x00lib,mac80211
eeprom_93cx6 12725 1 rt2500pci

I get the same behavior with later kernels.

So is my hardware ready for the trash can or do you see another possibility?

Bye
Johannes