Comment 0 for bug 1361646

lspci
03:00.0 Network controller: Qualcomm Atheros AR9285 Wireless Network Adapter (PCI-Express) (rev 01)

dmesg log gets filled with the info below. After a random time (sometimes minutes, sometimes hours), I lose wifi connection and the only solution I know is to reboot. It only started happening a week ago. I have been running kernel 3.13.0-34-generic but downgraded to 3.13.0-27-generic and that seems to have slightly reduced the frequency of the issue but I'm not sure.

[ 1026.507787] ath: phy0: Chip reset failed
[ 1026.507789] ath: phy0: Unable to reset channel, reset status -22
[ 1026.507798] ath: phy0: Unable to set channel
[ 1026.574954] ath: phy0: Failed to stop TX DMA, queues=0x18f!
[ 1026.588276] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
[ 1026.588285] ath: phy0: Could not stop RX, we could be confusing the DMA engine when we start RX up
[ 1026.705655] ath: phy0: Chip reset failed
[ 1026.705658] ath: phy0: Unable to reset channel, reset status -22
[ 1026.705669] ath: phy0: Unable to set channel
[ 1026.822978] ath: phy0: RX failed to go idle in 10 ms RXSM=0xffffffff
[ 1026.836305] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
[ 1028.354924] ath: phy0: Failed to wakeup in 500us
[ 1028.473207] ath: phy0: RX failed to go idle in 10 ms RXSM=0xffffffff
[ 1028.486727] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-27-generic 3.13.0-27.50
ProcVersionSignature: Ubuntu 3.13.0-27.50-generic 3.13.11
Uname: Linux 3.13.0-27-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.3
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: ian 3653 F.... pulseaudio
CurrentDesktop: Unity
Date: Tue Aug 26 22:50:01 2014
MachineType: ASUSTeK Computer Inc. N53SV
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-27-generic root=UUID=fb2b1d14-6b3b-4c2d-a133-2d08a1ec0b12 ro quiet splash
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-27-generic N/A
 linux-backports-modules-3.13.0-27-generic N/A
 linux-firmware 1.127.5
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
WifiSyslog:

dmi.bios.date: 01/09/2012
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: N53SV.215
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: N53SV
dmi.board.vendor: ASUSTeK Computer Inc.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK Computer Inc.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrN53SV.215:bd01/09/2012:svnASUSTeKComputerInc.:pnN53SV:pvr1.0:rvnASUSTeKComputerInc.:rnN53SV:rvr1.0:cvnASUSTeKComputerInc.:ct10:cvr1.0:
dmi.product.name: N53SV
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK Computer Inc.