First problems during downloading updates.
~$ iwconfig wlan1
wlan1 IEEE 802.11bgn
Mode:Managed Frequency:2.437 GHz
Bit Rate=54 Mb/s Tx-Power=20 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=35/70 Signal level=-75 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:324 Invalid misc:2714 Missed beacon:0
~$ dmesg | egrep '\<ath\>|ath9k'
[ 91.278092] ath: EEPROM regdomain: 0x809c
[ 91.278096] ath: EEPROM indicates we should expect a country code
[ 91.278098] ath: doing EEPROM country->regdmn map search
[ 91.278100] ath: country maps to regdmn code: 0x52
[ 91.278102] ath: Country alpha2 being used: CN
[ 91.278104] ath: Regpair used: 0x52
[ 91.351734] ieee80211 phy0: Selected rate control algorithm
'ath9k_rate_control'
[ 1374.857661] ath: phy0: Failed to stop TX DMA, queues=0x004!
[ 1648.808226] ath: phy0: Failed to stop TX DMA, queues=0x004!
[ 1650.241012] ath: phy0: DMA failed to stop in 10 ms AR_CR=0x00000024
AR_DIAG_SW=0x42000020 DMADBG_7=0x00006040
[ 1650.241031] ath: phy0: Could not stop RX, we could be confusing the DMA
engine when we start RX up
[ 1650.256753] ath: phy0: Failed to stop TX DMA, queues=0x005!
[ 1651.192010] ath: phy0: DMA failed to stop in 10 ms AR_CR=0x00000024
AR_DIAG_SW=0x42000020 DMADBG_7=0x00006040
[ 1651.204642] ath: phy0: DMA failed to stop in 10 ms AR_CR=0x00000024
AR_DIAG_SW=0x42000020 DMADBG_7=0x00006040
[ 1651.226379] ath: phy0: DMA failed to stop in 10 ms AR_CR=0x00000024
AR_DIAG_SW=0x42000020 DMADBG_7=0x00006040
[ 1651.226387] ath: phy0: Could not stop RX, we could be confusing the DMA
engine when we start RX up
[ 1651.241927] ath: phy0: Failed to stop TX DMA, queues=0x005!
[ 1789.144920] ath: phy0: Failed to stop TX DMA, queues=0x004!
[ 1790.790088] ath: phy0: DMA failed to stop in 10 ms AR_CR=0x00000024
AR_DIAG_SW=0x42000020 DMADBG_7=0x00006040
[ 1790.806831] ath: phy0: DMA failed to stop in 10 ms AR_CR=0x00000024
AR_DIAG_SW=0x42000020 DMADBG_7=0x00006040
[ 1790.824216] ath: phy0: DMA failed to stop in 10 ms AR_CR=0x00000024
AR_DIAG_SW=0x42000020 DMADBG_7=0x00006040
[ 1790.824224] ath: phy0: Could not stop RX, we could be confusing the DMA
engine when we start RX up
[ 1790.831924] ath: phy0: Failed to stop TX DMA, queues=0x001!
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https://bugs.launchpad.net/bugs/1032826
Title:
168c:0023 ath9k wifi slow, and frequently disconnects/reconnects
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