Bug#556009: ath9k disassociates from 2.6.32-5
After upgrading to Squeeze, my ath9k is dropping its connection
My hardware and issues matches a bug that is apparently resolved in
current linux vanilla (per upstream comments), however persists in the
current squeeze 2.6.32-25 images.
The issue is consistent with my syslog, my hardware, and my observation
that this occurs under some load (rarely when idle) per upstream
01:0a.0 Network controller: Atheros Communications Inc. AR5008 Wireless Network Adapter (rev 01)
Subsystem: D-Link System Inc DWA-552 802.11n Xtreme N Desktop Adapter (rev A1)
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 168, Cache Line Size: 64 bytes
Interrupt: pin A routed to IRQ 18
Region 0: Memory at fdde0000 (32-bit, non-prefetchable) [size=64K]
Capabilities:  #80 
Kernel driver in use: ath9k
I have implemented a shutdown of power management that may help per
upstream, but have yet to confirm if this workaround is effective at
# iwconfig ath1 power off
The issue does not have a set frequency occurring at intervals of
minutes, hours and days.
Some syslog message samples with obfuscated mac appears as:
Oct 19 07:44:27 maple kernel: [26796.312016] No probe response from AP 00:01:46:XX:XX:XX after 500ms, disconnecting.
Oct 19 19:13:32 maple kernel: [ 6159.317018] No probe response from AP 00:01:46:XX:XX:XX after 500ms, disconnecting.
Oct 20 14:23:26 maple kernel: [75153.317020] No probe response from AP 00:01:46:XX:XX:XX after 500ms, disconnecting.
This system is running the 2.6.32-25 amd64-xen flavour.
ii xen-linux-system-2.6.32-5-xen-amd64 2.6.32-25 Xen system with Linux 2.6.32 on 64-bit PCs (meta-package)
ii wireless-tools 30~pre9-5 Tools for manipulating Linux Wireless Extensions