Comment 51 for bug 735171

Oneiric also once in a while (minutes/hours, depending on how much traffic I make) disconnects the Wifi (WPA2) connection and cannot connect back to it. Usually a restart either of the router, or of the ubuntu system makes it work again (until it disconnects again).

I use the latest official launched kernel on Oneiric (3.0.0-16-generic) and all updates up-to-date. Should I open a new bug report?
These issues with ath9k last since forever :(

sudo lspci -v -s 02:00.0 |egrep -v 'Serial Number'
02:00.0 Network controller: Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) (rev 01)
 Subsystem: Lite-On Communications Inc Device 6611
 Flags: bus master, fast devsel, latency 0, IRQ 17
 Memory at d4400000 (64-bit, non-prefetchable) [size=64K]
 Capabilities: [40] Power Management version 3
 Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit-
 Capabilities: [60] Express Legacy Endpoint, MSI 00
 Capabilities: [100] Advanced Error Reporting
 Capabilities: [140] Virtual Channel
 Capabilities: [170] Power Budgeting <?>
 Kernel driver in use: ath9k
 Kernel modules: ath9k

uname -a
Linux florin-Satellite-C650 3.0.0-16-generic #29-Ubuntu SMP Tue Feb 14 12:48:51 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux