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Ticket #1596 (new defect)

Opened 14 years ago

DWL-G520 Performances

Reported by: Assigned to:
Priority: minor Milestone:
Component: madwifi: driver Version: v0.9.3.3
Keywords: atheros r5121 perfomance Cc:
Patch is attached: 0 Pending:


Hi, I get a DWL-G520 and very bad performances compared to my ipw3945 :

$ iwlist ath0 scanning | wc

$ iwlist eth1 scanning | wc
$ iwconfig ath0
ath0      IEEE 802.11g  ESSID:"chtavil"  Nickname:""
          Mode:Managed  Frequency:2.442 GHz  Access Point: 66:4C:4D:D1:C9:BC
          Bit Rate:11 Mb/s   Tx-Power:18 dBm   Sensitivity=1/1
          Retry:off   RTS thr:off   Fragment thr:off
          Encryption key:xxxxx   Security mode:restricted
          Power Management:off
          Link Quality=12/70  Signal level=-68 dBm  Noise level=-80 dBm
          Rx invalid nwid:15877  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

$ iwconfig eth1
eth1      IEEE 802.11g  ESSID:"chtavil"
          Mode:Managed  Frequency:2.442 GHz  Access Point: 66:4C:4D:D1:C9:BC
          Bit Rate:54 Mb/s   Tx-Power:15 dBm
          Retry limit:15   RTS thr:off   Fragment thr:off
          Encryption key:xxxx   Security mode:open
          Power Management:off
          Link Quality=83/100  Signal level=-51 dBm  Noise level=-52 dBm
          Rx invalid nwid:0  Rx invalid crypt:3  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:7   Missed beacon:0

see the noise/invalid nwid difference. eth1 is in a laptop on the same desk.

Drivers : 9.3.2 9.3.3 and trunk

Hardware information :

$ lshw 
             description: Wireless interface
             product: AR5212 802.11abg NIC
             vendor: Atheros Communications, Inc.
             physical id: a
             bus info: pci@0000:00:0a.0
             logical name: wifi0
             version: 01
             serial: 00:11:95:f2:2d:aa
             width: 32 bits
             clock: 33MHz
             capabilities: pm bus_master cap_list logical ethernet physical wireless
             configuration: broadcast=yes driver=ath_pci ip= latency=96 maxlatency=28 mingnt=10 module=ath_pci multicast=yes wireless=IEEE 802.11g

$ lspci

00:0a.0 Ethernet controller: Atheros Communications, Inc. AR5212 802.11abg NIC (rev 01)
        Subsystem: D-Link System Inc D-Link AirPlus DWL-G520 Wireless PCI Adapter(rev.B)
        Flags: bus master, medium devsel, latency 96, IRQ 19
        Memory at fb020000 (32-bit, non-prefetchable) [size=64K]
        Capabilities: [44] Power Management version 2