Comment 58 for bug 1016181

I'm having the same problem in Ubuntu 13.10 on an Asus N53SV laptop. I have disabled the power saving as described in #54, I'll report if that fixes the problem. I'm also affected by the following bug, which seems to be caused by suspend/wake up issues, it might be related (in my case)? https://bugs.launchpad.net/ubuntu/+source/systemd-shim/+bug/1184262

Here are some of the log messages after the wifi dies:

kernel: [11290.855711] ath: phy0: Unable to reset channel, reset status -22
kernel: [11290.855722] ath: phy0: Unable to set channel
kernel: [11290.972455] ath: phy0: RX failed to go idle in 10 ms RXSM=0xffffffff
kernel: [11290.985712] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
kernel: [11295.325896] ath: phy0: Failed to wakeup in 500us
kernel: [11295.444032] ath: phy0: RX failed to go idle in 10 ms RXSM=0xffffffff
kernel: [11295.457584] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
kernel: [11295.669271] ath: phy0: Failed to wakeup in 500us
kernel: [11295.738664] ath: phy0: Failed to stop TX DMA, queues=0x18f!
kernel: [11295.752254] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
kernel: [11295.752765] ath: phy0: Could not stop RX, we could be confusing the DMA engine when we start RX up
kernel: [11295.870951] ath: phy0: Chip reset failed
kernel: [11295.870958] ath: phy0: Unable to reset channel, reset status -22
kernel: [11295.870991] ath: phy0: Unable to set channel
kernel: [11295.940392] ath: phy0: Failed to stop TX DMA, queues=0x18f!
kernel: [11295.953969] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
kernel: [11295.954025] ath: phy0: Could not stop RX, we could be confusing the DMA engine when we start RX up
kernel: [11296.072215] ath: phy0: Chip reset failed