Comment 8 for bug 435808

I'm also hitting this issue on Acer Aspire One d150 - Karmic NBR with latest updates

Nov 4 22:43:32 fish-laptop kernel: [ 75.578555] ath5k phy0: noise floor calibration timeout (2412MHz)
Nov 4 22:43:32 fish-laptop kernel: [ 75.680194] ath5k phy0: noise floor calibration failed (2417MHz)
Nov 4 22:43:32 fish-laptop kernel: [ 76.082569] ath5k phy0: noise floor calibration timeout (2422MHz)
Nov 4 22:43:34 fish-laptop wpa_supplicant[1124]: CTRL-EVENT-SCAN-RESULTS
Nov 4 22:44:12 fish-laptop kernel: [ 115.529736] ath5k phy0: noise floor calibration failed (2412MHz)
Nov 4 22:44:12 fish-laptop kernel: [ 115.630263] ath5k phy0: noise floor calibration failed (2417MHz)
Nov 4 22:44:12 fish-laptop kernel: [ 115.990275] ath5k phy0: noise floor calibration failed (2422MHz)
Nov 4 22:44:13 fish-laptop wpa_supplicant[1124]: CTRL-EVENT-SCAN-RESULTS
Nov 4 22:45:12 fish-laptop kernel: [ 175.406822] ath5k phy0: noise floor calibration failed (2412MHz)
Nov 4 22:45:12 fish-laptop kernel: [ 175.504132] ath5k phy0: noise floor calibration failed (2417MHz)
Nov 4 22:45:12 fish-laptop kernel: [ 175.702510] ath5k phy0: noise floor calibration failed (2422MHz)
Nov 4 22:45:13 fish-laptop wpa_supplicant[1124]: CTRL-EVENT-SCAN-RESULTS
Nov 4 22:46:32 fish-laptop kernel: [ 255.591596] ath5k phy0: noise floor calibration failed (2412MHz)
Nov 4 22:46:32 fish-laptop kernel: [ 255.687784] ath5k phy0: noise floor calibration failed (2417MHz)
Nov 4 22:46:32 fish-laptop kernel: [ 256.052286] ath5k phy0: noise floor calibration failed (2422MHz)
Nov 4 22:46:34 fish-laptop wpa_supplicant[1124]: CTRL-EVENT-SCAN-RESULTS
Nov 4 22:48:12 fish-laptop kernel: [ 355.391029] ath5k phy0: noise floor calibration failed (2412MHz)
Nov 4 22:48:12 fish-laptop kernel: [ 355.490069] ath5k phy0: noise floor calibration failed (2417MHz)
Nov 4 22:48:12 fish-laptop kernel: [ 355.762439] ath5k phy0: noise floor calibration failed (2422MHz)
Nov 4 22:48:13 fish-laptop wpa_supplicant[1124]: CTRL-EVENT-SCAN-RESULTS