I confirm the same behavior.
ath5k phy0: unsupported jumbo
ath5k phy0: noise floor calibration timeout (2412MHz)
ath5k phy0: noise floor calibration failed (2417MHz)
ath5k phy0: noise floor calibration timeout (2422MHz)
What is odd for me here at home is that in my kitchen where this laptop mostly
is, the connection is stable most of the times.
If I carry the laptop just few meters away to living room, wlan sometimes gets
even disconnected but at least the speed is slow all the time.
Card:
05:00.0 Ethernet controller: Atheros Communications Inc. AR242x 802.11abg
Wireless PCI Express Adapter (rev 01)
Subsystem: AMBIT Microsystem Corp. Device 0428
Flags: bus master, fast devsel, latency 0, IRQ 19
Memory at d0400000 (64-bit, non-prefetchable) [size=64K]
Capabilities: [40] Power Management version 2
Capabilities: [50] Message Signalled Interrupts: Mask- 64bit- Queue=0/0
Enable-
Capabilities: [60] Express Legacy Endpoint, MSI 00
Capabilities: [90] MSI-X: Enable- Mask- TabSize=1
Capabilities: [100] Advanced Error Reporting <?>
Capabilities: [140] Virtual Channel <?>
Kernel driver in use: ath5k
Kernel modules: ath5k, ath_pci
--
juanty ath5k : disconnection / slow network
https://bugs.launchpad.net/bugs/369005
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