[FS#1450] ath9k Wifi hangup on Channel 11 at low load

LEDE Bugs lede-bugs at lists.infradead.org
Mon Mar 19 23:24:13 PDT 2018


A new Flyspray task has been opened.  Details are below. 

User who did this - linuxonlinehelp (linuxonlinehelp) 

Attached to Project - OpenWrt/LEDE Project
Summary - ath9k Wifi hangup on Channel 11 at low load
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Low
Priority - Very Low
Reported Version - Trunk
Due in Version - Undecided
Due Date - Undecided
Details - Bug: 
Router TP Link n600 wdr3600 connected clients 2 TP Link 841 with relayd stop working, no ping, route, dns.. after 3-12hours

Area: 
No other wifi senders at my range! cause small village!

Settings:
WPA2-CCMP
HT40/HT20

Release:
DISTRIB_RELEASE='SNAPSHOT'
DISTRIB_REVISION='r6503-5faa955'
DISTRIB_TARGET='ar71xx/generic'
DISTRIB_ARCH='mips_24kc'
DISTRIB_DESCRIPTION='OpenWrt SNAPSHOT r6503-5faa955'

staion-dump: 
inactive time:  0 ms
        rx bytes:       1268361819
        rx packets:     857809
        tx bytes:       41626891
        tx packets:     442685
        tx retries:     138880
        tx failed:      0
        rx drop misc:   6659
        signal:         -56 [-58, -61] dBm
        signal avg:     -54 [-57, -58] dBm
        tx bitrate:     130.0 MBit/s MCS 15
        rx bitrate:     144.4 MBit/s MCS 15 short GI
        expected throughput:    44.677Mbps
        authorized:     yes
        authenticated:  yes
        associated:     yes
        preamble:       short
        WMM/WME:        yes
        MFP:            no
        TDLS peer:      no
        DTIM period:    2
        beacon interval:100
        short preamble: yes
        short slot time:yes
        connected time: 1393 seconds

Tested with and without ani (AirTimeFairness) no results!

Solution: Switch to Channel 6 now stable 2 days!

Tested: 
-Routers at range 1 Meter same problems!
-With and without ani (AirTimeFairness) no results!
-Disabled IPV6 no help (cause some posts reports problems with ipv6)

Remark: No big bug messages on dmesg and logread.

{{{
reset:
 Baseband Hang:  0
Baseband Watchdog:  0
   Fatal HW Error:  0
      TX HW error:  0
 Transmit timeout:  0
     TX Path Hang:  0
      PLL RX Hang:  0
         MAC Hang:  0
     Stuck Beacon:  0
        MCI Reset:  0
Calibration error:  0
Tx DMA stop error:  0
Rx DMA stop error:  0

ani:
ANI RESET: 4
     OFDM LEVEL: 0
      CCK LEVEL: 0
        SPUR UP: 4
      SPUR DOWN: 4
 OFDM WS-DET ON: 0
OFDM WS-DET OFF: 0
     MRC-CCK ON: 0
    MRC-CCK OFF: 0
    FIR-STEP UP: 20
  FIR-STEP DOWN: 22
 INV LISTENTIME: 0
    OFDM ERRORS: 100299
     CCK ERRORS: 333896
}}}

dmesg;
[   45.667980] br-lan: port 2(wlan0) entered blocking state
[   45.673381] br-lan: port 2(wlan0) entered disabled state
[   45.679216] device wlan0 entered promiscuous mode
[   45.769097] IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready
[   45.830992] br-lan: port 3(wlan1) entered blocking state
[   45.836394] br-lan: port 3(wlan1) entered disabled state
[   45.842256] device wlan1 entered promiscuous mode
[   45.847281] br-lan: port 3(wlan1) entered blocking state
[   45.852683] br-lan: port 3(wlan1) entered forwarding state
[   46.587328] br-lan: port 3(wlan1) entered disabled state
[   47.788177] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[   47.794798] br-lan: port 2(wlan0) entered blocking state
[   47.800245] br-lan: port 2(wlan0) entered forwarding state
[   48.471159] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
[   48.477841] br-lan: port 3(wlan1) entered blocking state
[   48.483239] br-lan: port 3(wlan1) entered forwarding state

More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=1450



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