I received this bug report on ath9k:
On Thu, 2011-04-14 at 14:39 +0200, Gunnar Stahl wrote:
Package: linux-2.6
Version: 2.6.38-3
Severity: important
Since linux-image-2.6.38-2-amd64 the wlan connections on this machine is 1)
slow to connection and 2) slows down to a crawl and 3) dies after some seconds
/ mintes and becomes completely unusable.
Connecting over standard eth0 makes no problems at all. Only the wlan is
affected.
Booting the same machine again with linux-image-2.6.32-5-amd64 turns the wlan
back to normal again.
[...]
02:00.0 Network controller [0280]: Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) [168c:002b] (rev 01)
Subsystem: AzureWave Device [1a3b:1089]
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast>TAbort-<TAbort-<MAbort->SERR-<PERR- INTx-
Latency: 0, Cache Line Size: 32 bytes
Interrupt: pin A routed to IRQ 17
Region 0: Memory at feaf0000 (64-bit, non-prefetchable) [size=64K]
Capabilities:<access denied>
Kernel driver in use: ath9k
[...]
Further system details at<http://bugs.debian.org/622753>.
Ben.