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FS#1450 - ath9k Wifi hangup on Channel 11 at low load #5835

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openwrt-bot opened this issue Mar 20, 2018 · 1 comment
Open

FS#1450 - ath9k Wifi hangup on Channel 11 at low load #5835

openwrt-bot opened this issue Mar 20, 2018 · 1 comment
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@openwrt-bot
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linuxonlinehelp:

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

@openwrt-bot
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4034:

I'm seeing something similar on a BT Home Hub 5A. In my case I was getting a tiny amount of throughput, ~0.02Mb/s router->client but the other direction was pretty much OK. After switching to channel 6, everything is still working normally after 24 hours.

I think this is a regression from 17.01.4 as a) I used that for a few days without issue and b) this is quite a popular device in the UK so we'd be seeing more reports.

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