Comment 37 for bug 735171

Asus UL30A-X5 here - Everything worked great with Ubuntu 10.04, and 10.10. Went to 11.04, and on N networks, I'll get full speed (>5MB/sec briefly, then it drops to ~1MB/sec, and sometimes stalls.

$ uname -a
Linux lap 2.6.38-8-generic #42-Ubuntu SMP Mon Apr 11 03:31:24 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 11.04
Release: 11.04
Codename: natty

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: AzureWave Device 1089
 Flags: bus master, fast devsel, latency 0, IRQ 17
 Memory at feaf0000 (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