#10 "weak signal" with rtl8180 and Belking 701f

open
nobody
None
5
2009-01-31
2009-01-31
Anonymous
No

using ndiswrapper v1.53 the windows net8185 driver, 'iwlist wlan0 scan' shows 3 - 5 networks, with signal strengths ranging from 30 - 60%. using the rtl8180 driver, 'iwlist wlan0 scan' shows at best one network, at signal strength 9 - 16%, and cannot connect to the network i connect to (almost) flawlessly with ndiswrapper.

i'm currently running kernel 2.6.28.2, but this bug has been present at least since 2.6.26.

lspci -vv shows:
<snip />
06:00.0 Ethernet controller: Belkin Device 701f (rev 20)
Subsystem: Belkin Device 701f
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 64 (8000ns min, 16000ns max), Cache Line Size: 32 bytes
Interrupt: pin A routed to IRQ 11
Region 0: I/O ports at 3000 [size=256]
Region 1: Memory at 3c000000 (32-bit, non-prefetchable) [size=1K]
Capabilities: [50] Power Management version 2
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA PME(D0-,D1+,D2+,D3hot+,D3cold+)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
Kernel driver in use: ndiswrapper
Kernel modules: rtl8180
<snip />

Discussion

  • Nobody/Anonymous

    dmesg snip for ndiswrapper insertion

     
  • Nobody/Anonymous

    dmesg snip for rtl8180:

    Jan 31 12:49:07 laura cfg80211: Using static regulatory domain info
    Jan 31 12:49:07 laura cfg80211: Regulatory domain: US
    Jan 31 12:49:07 laura (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
    Jan 31 12:49:07 laura (2402000 KHz - 2472000 KHz @ 40000 KHz), (600 mBi, 2700 mBm)
    Jan 31 12:49:07 laura (5170000 KHz - 5190000 KHz @ 40000 KHz), (600 mBi, 2300 mBm)
    Jan 31 12:49:07 laura (5190000 KHz - 5210000 KHz @ 40000 KHz), (600 mBi, 2300 mBm)
    Jan 31 12:49:07 laura (5210000 KHz - 5230000 KHz @ 40000 KHz), (600 mBi, 2300 mBm)
    Jan 31 12:49:07 laura (5230000 KHz - 5330000 KHz @ 40000 KHz), (600 mBi, 2300 mBm)
    Jan 31 12:49:07 laura (5735000 KHz - 5835000 KHz @ 40000 KHz), (600 mBi, 3000 mBm)
    Jan 31 12:49:07 laura cfg80211: Calling CRDA for country: US
    Jan 31 12:49:07 laura rtl8180 0000:06:00.0: PCI INT A -> Link[LNKB] -> GSI 11 (level, low) -> IRQ 11
    Jan 31 12:49:07 laura phy0: Selected rate control algorithm 'pid'
    Jan 31 12:49:08 laura load-modules.sh: 'platform:regulatory' is not a valid module or alias name
    Jan 31 12:49:08 laura phy0: hwaddr 00:17:3f:d6:bc:9c, RTL8185vD + rtl8225z2

    iwlist results with ndiswrapper:

    wlan0 Scan completed :
    Cell 01 - Address: 00:1D:7E:41:7E:98
    ESSID:"admin"
    Protocol:IEEE 802.11g
    Mode:Managed
    Frequency:2.422 GHz (Channel 3)
    Quality:48/100 Signal level:-65 dBm Noise level:-96 dBm
    Encryption key:off
    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
    24 Mb/s; 36 Mb/s; 54 Mb/s
    Extra:bcn_int=100
    Extra:atim=0

    iwlist results with rtl8180:

    lan0 Scan completed :
    Cell 01 - Address: 00:1D:7E:41:7E:98
    ESSID:"admin"
    Protocol:IEEE 802.11g
    Mode:Managed
    Frequency:2.422 GHz (Channel 3)
    Quality:9/100 Signal level:-65 dBm Noise level:-96 dBm
    Encryption key:off
    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
    24 Mb/s; 36 Mb/s; 54 Mb/s
    Extra:bcn_int=100
    Extra:atim=0

     
  • Nobody/Anonymous

    i really ought to have created an account, but since i didn't, and i forgot, here's my email address:

    drkludge [AT] rat (DASH) patrol {DOT} org

     
  • Nobody/Anonymous

    I observe the same with rtl8180. I currently have to stick with kernel linux1 2.6.25-gentoo-r9 because in
    this release the driver still works fine. If I upgrade the kernel to >=2.6.26 I get very low signal
    strength and it wont connect. Here is a typical output of

    Apr 14 04:09:45 linux1 wlan0: associated
    Apr 14 04:09:48 linux1 wlan0: disassociated
    Apr 14 04:09:49 linux1 wlan0: associate with AP 00:01:12:13:14:15
    Apr 14 04:09:49 linux1 wlan0: deauthenticated
    Apr 14 04:09:50 linux1 wlan0: authenticate with AP 00:01:12:13:14:15
    Apr 14 04:09:50 linux1 wlan0: authenticated
    Apr 14 04:09:50 linux1 wlan0: associate with AP 00:01:12:13:14:15
    Apr 14 04:09:50 linux1 wlan0: RX ReassocResp from 00:01:12:13:14:15 (capab=0x411 status=0 aid=1)
    Apr 14 04:09:50 linux1 wlan0: associated
    Apr 14 04:09:53 linux1 wlan0: disassociated

    lspci says I have a
    00:0e.0 Ethernet controller: Belkin Device 700f (rev 20)

    Again with 2.6.25 kernel things work like a charm

     
  • Nobody/Anonymous

    As I noted on one of the other bugs, there are issues lodged in various places for low signal issues against these chipsets. https://bugs.launchpad.net/ubuntu/+source/linux/+bug/293946 is just one of the references to it.

    If you're looking at this page, you can also add your voices over there so it can get more attention.

     

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