qBittorrent 3.0.8 drops Wireless connection when opened

[quser]

When I open qBittorrent 3.0.8 in Xubuntu 12.04.2 x32 he drops my wireless connection. I need to insert wireless password again in Network Manager and reconnect.

[Peter]

Open up a terminal, and check dmesg.

Type: "dmesg | less"
You should see some errors at the bottom of this log.
Please paste them here.

[quser]

I upgrade to Quantal (clean install) and install qBittorrent 3.0.9 but error remain. When my wireless connection is dropped I need to exclude connection on Network Manager and reconnect. I need to re-insert password.

dmesg | less

[  19.292200] wlan0: authenticate with fc:75:16:43:28:f0
[  19.314889] wlan0: send auth to fc:75:16:43:28:f0 (try 1/3)
[  19.316638] wlan0: authenticated
[  19.323991] wlan0: associate with fc:75:16:43:28:f0 (try 1/3)
[  19.326865] wlan0: RX AssocResp from fc:75:16:43:28:f0 (capab=0x411 status=0 aid=1)
[  19.327054] wlan0: associated
[  19.327551] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[  19.327723] cfg80211: Calling CRDA for country: US
[  19.342700] cfg80211: Updating information on frequency 2412 MHz for a 20 MHz width channel with regulatory rule:
[  19.342715] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  19.342721] cfg80211: Updating information on frequency 2417 MHz for a 20 MHz width channel with regulatory rule:
[  19.342728] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  19.342733] cfg80211: Updating information on frequency 2422 MHz for a 20 MHz width channel with regulatory rule:
[  19.342739] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  19.342745] cfg80211: Updating information on frequency 2427 MHz for a 20 MHz width channel with regulatory rule:
[  19.342750] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  19.342755] cfg80211: Updating information on frequency 2432 MHz for a 20 MHz width channel with regulatory rule:
[  19.342761] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  19.342766] cfg80211: Updating information on frequency 2437 MHz for a 20 MHz width channel with regulatory rule:
[  19.342771] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  19.342776] cfg80211: Updating information on frequency 2442 MHz for a 20 MHz width channel with regulatory rule:
[  19.342782] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  19.342787] cfg80211: Updating information on frequency 2447 MHz for a 20 MHz width channel with regulatory rule:
[  19.342792] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  19.342797] cfg80211: Updating information on frequency 2452 MHz for a 20 MHz width channel with regulatory rule:
[  19.342802] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  19.342807] cfg80211: Updating information on frequency 2457 MHz for a 20 MHz width channel with regulatory rule:
[  19.342812] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  19.342817] cfg80211: Updating information on frequency 2462 MHz for a 20 MHz width channel with regulatory rule:
[  19.342822] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  19.342827] cfg80211: Disabling freq 2467 MHz
[  19.342831] cfg80211: Disabling freq 2472 MHz
[  19.342835] cfg80211: Disabling freq 2484 MHz
[  19.342847] ath: regdomain 0x8348 updated by CountryIE
[  19.342851] ath: EEPROM regdomain: 0x8348
[  19.342855] ath: EEPROM indicates we should expect a country code
[  19.342860] ath: doing EEPROM country->regdmn map search
[  19.342865] ath: country maps to regdmn code: 0x3a
[  19.342870] ath: Country alpha2 being used: US
[  19.342873] ath: Regpair used: 0x3a
[  19.342974] cfg80211: Regulatory domain changed to country: US
[  19.342979] cfg80211:  (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[  19.342984] cfg80211:  (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  19.342990] cfg80211:  (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 1700 mBm)
[  19.342995] cfg80211:  (5250000 KHz - 5330000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[  19.343001] cfg80211:  (5490000 KHz - 5600000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[  19.343006] cfg80211:  (5650000 KHz - 5710000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[  19.343011] cfg80211:  (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 3000 mBm)
[  21.093516] fglrx_pci 0000:00:01.0: irq 42 for MSI/MSI-X
[  21.095433] [fglrx] Firegl kernel thread PID: 1293
[  21.095726] [fglrx] Firegl kernel thread PID: 1295
[  21.095944] [fglrx] Firegl kernel thread PID: 1296
[  21.096200] [fglrx] IRQ 42 Enabled
[  21.105469] [fglrx] Gart USWC size:544 M.
[  21.105476] [fglrx] Gart cacheable size:213 M.
[  21.105488] [fglrx] Reserved FB block: Shared offset:0, size:1000000
[  21.105494] [fglrx] Reserved FB block: Unshared offset:fe3e000, size:1b6000
[  21.105500] [fglrx] Reserved FB block: Unshared offset:fff4000, size:c000
[  21.137194] acer_wmi: Unknown function number - 3 - 1
[  21.235406] [fglrx] ATIF platform detected with notification ID: 0x81
[  579.862187] cfg80211: All devices are disconnected, going to restore regulatory settings
[  579.862207] cfg80211: Restoring regulatory settings
[  579.862219] cfg80211: Calling CRDA to update world regulatory domain
[  579.874680] cfg80211: Ignoring regulatory request Set by core since the driver uses its own custom regulatory domain
[  579.877889] cfg80211: World regulatory domain updated:
[  579.877895] cfg80211:  (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[  579.877903] cfg80211:  (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[  579.877909] cfg80211:  (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[  579.877916] cfg80211:  (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[  579.877921] cfg80211:  (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[  579.877927] cfg80211:  (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[  595.083518] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[  674.676963] wlan0: authenticate with fc:75:16:43:28:f0
[  674.684983] wlan0: send auth to fc:75:16:43:28:f0 (try 1/3)
[  674.687013] wlan0: authenticated
[  674.698741] wlan0: associate with fc:75:16:43:28:f0 (try 1/3)
[  674.701769] wlan0: RX AssocResp from fc:75:16:43:28:f0 (capab=0x411 status=0 aid=1)
[  674.701898] wlan0: associated
[  674.702405] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[  674.702651] cfg80211: Calling CRDA for country: US
[  674.715421] cfg80211: Updating information on frequency 2412 MHz for a 20 MHz width channel with regulatory rule:
[  674.715435] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  674.715442] cfg80211: Updating information on frequency 2417 MHz for a 20 MHz width channel with regulatory rule:
[  674.715448] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  674.715454] cfg80211: Updating information on frequency 2422 MHz for a 20 MHz width channel with regulatory rule:
[  674.715459] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  674.715465] cfg80211: Updating information on frequency 2427 MHz for a 20 MHz width channel with regulatory rule:
[  674.715470] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  674.715475] cfg80211: Updating information on frequency 2432 MHz for a 20 MHz width channel with regulatory rule:
[  674.715481] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  674.715486] cfg80211: Updating information on frequency 2437 MHz for a 20 MHz width channel with regulatory rule:
[  674.715491] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  674.715496] cfg80211: Updating information on frequency 2442 MHz for a 20 MHz width channel with regulatory rule:
[  674.715501] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  674.715506] cfg80211: Updating information on frequency 2447 MHz for a 20 MHz width channel with regulatory rule:
[  674.715512] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  674.715516] cfg80211: Updating information on frequency 2452 MHz for a 20 MHz width channel with regulatory rule:
[  674.715522] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  674.715527] cfg80211: Updating information on frequency 2457 MHz for a 20 MHz width channel with regulatory rule:
[  674.715532] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  674.715537] cfg80211: Updating information on frequency 2462 MHz for a 20 MHz width channel with regulatory rule:
[  674.715542] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  674.715547] cfg80211: Disabling freq 2467 MHz
[  674.715551] cfg80211: Disabling freq 2472 MHz
[  674.715554] cfg80211: Disabling freq 2484 MHz
[  674.715568] ath: regdomain 0x8348 updated by CountryIE
[  674.715572] ath: EEPROM regdomain: 0x8348
[  674.715576] ath: EEPROM indicates we should expect a country code
[  674.715581] ath: doing EEPROM country->regdmn map search
[  674.715586] ath: country maps to regdmn code: 0x3a
[  674.715591] ath: Country alpha2 being used: US
[  674.715594] ath: Regpair used: 0x3a
[  674.715699] cfg80211: Regulatory domain changed to country: US
[  674.715702] cfg80211:  (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[  674.715707] cfg80211:  (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  674.715711] cfg80211:  (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 1700 mBm)
[  674.715715] cfg80211:  (5250000 KHz - 5330000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[  674.715719] cfg80211:  (5490000 KHz - 5600000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[  674.715723] cfg80211:  (5650000 KHz - 5710000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[  674.715727] cfg80211:  (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 3000 mBm)
[  781.325000] wlan0: deauthenticating from fc:75:16:43:28:f0 by local choice (reason=3)
[  781.355078] cfg80211: All devices are disconnected, going to restore regulatory settings
[  781.355098] cfg80211: Restoring regulatory settings
[  781.355122] cfg80211: Calling CRDA to update world regulatory domain
[  781.386952] cfg80211: Ignoring regulatory request Set by core since the driver uses its own custom regulatory domain
[  781.390754] cfg80211: World regulatory domain updated:
[  781.390766] cfg80211:  (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[  781.390779] cfg80211:  (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[  781.390786] cfg80211:  (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[  781.390792] cfg80211:  (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[  781.390798] cfg80211:  (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[  781.390803] cfg80211:  (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[  786.493618] wlan0: authenticate with fc:75:16:43:28:f0
[  786.501987] wlan0: send auth to fc:75:16:43:28:f0 (try 1/3)
[  786.503822] wlan0: authenticated
[  786.511989] wlan0: associate with fc:75:16:43:28:f0 (try 1/3)
[  786.515439] wlan0: RX AssocResp from fc:75:16:43:28:f0 (capab=0x411 status=0 aid=1)
[  786.515606] wlan0: associated
[  786.516109] cfg80211: Calling CRDA for country: US
[  786.528683] cfg80211: Updating information on frequency 2412 MHz for a 20 MHz width channel with regulatory rule:
[  786.528700] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  786.528708] cfg80211: Updating information on frequency 2417 MHz for a 20 MHz width channel with regulatory rule:
[  786.528716] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  786.528724] cfg80211: Updating information on frequency 2422 MHz for a 20 MHz width channel with regulatory rule:
[  786.528731] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  786.528738] cfg80211: Updating information on frequency 2427 MHz for a 20 MHz width channel with regulatory rule:
[  786.528745] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  786.528751] cfg80211: Updating information on frequency 2432 MHz for a 20 MHz width channel with regulatory rule:
[  786.528759] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  786.528765] cfg80211: Updating information on frequency 2437 MHz for a 20 MHz width channel with regulatory rule:
[  786.528772] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  786.528778] cfg80211: Updating information on frequency 2442 MHz for a 20 MHz width channel with regulatory rule:
[  786.528785] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  786.528792] cfg80211: Updating information on frequency 2447 MHz for a 20 MHz width channel with regulatory rule:
[  786.528798] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  786.528804] cfg80211: Updating information on frequency 2452 MHz for a 20 MHz width channel with regulatory rule:
[  786.528811] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  786.528817] cfg80211: Updating information on frequency 2457 MHz for a 20 MHz width channel with regulatory rule:
[  786.528825] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  786.528831] cfg80211: Updating information on frequency 2462 MHz for a 20 MHz width channel with regulatory rule:
[  786.528838] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  786.528844] cfg80211: Disabling freq 2467 MHz
[  786.528848] cfg80211: Disabling freq 2472 MHz
[  786.528853] cfg80211: Disabling freq 2484 MHz
[  786.528869] ath: regdomain 0x8348 updated by CountryIE
[  786.528874] ath: EEPROM regdomain: 0x8348
[  786.528878] ath: EEPROM indicates we should expect a country code
[  786.528885] ath: doing EEPROM country->regdmn map search
[  786.528891] ath: country maps to regdmn code: 0x3a
[  786.528896] ath: Country alpha2 being used: US
[  786.528901] ath: Regpair used: 0x3a
[  786.529012] cfg80211: Regulatory domain changed to country: US
[  786.529018] cfg80211:  (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[  786.529025] cfg80211:  (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  786.529032] cfg80211:  (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 1700 mBm)
[  786.529039] cfg80211:  (5250000 KHz - 5330000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[  786.529045] cfg80211:  (5490000 KHz - 5600000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[  786.529053] cfg80211:  (5650000 KHz - 5710000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[  786.529059] cfg80211:  (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 3000 mBm)
[  806.949063] wlan0: deauthenticating from fc:75:16:43:28:f0 by local choice (reason=3)
[  806.976875] cfg80211: All devices are disconnected, going to restore regulatory settings
[  806.976890] cfg80211: Restoring regulatory settings
[  806.976899] cfg80211: Calling CRDA to update world regulatory domain
[  807.008612] cfg80211: Ignoring regulatory request Set by core since the driver uses its own custom regulatory domain
[  807.012502] cfg80211: World regulatory domain updated:
[  807.012509] cfg80211:  (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[  807.012516] cfg80211:  (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[  807.012523] cfg80211:  (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[  807.012529] cfg80211:  (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[  807.012535] cfg80211:  (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[  807.012540] cfg80211:  (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[  845.915668] wlan0: authenticate with fc:75:16:43:28:f0
[  845.925165] wlan0: send auth to fc:75:16:43:28:f0 (try 1/3)
[  845.927242] wlan0: authenticated
[  845.938345] wlan0: associate with fc:75:16:43:28:f0 (try 1/3)
[  845.941531] wlan0: RX AssocResp from fc:75:16:43:28:f0 (capab=0x411 status=0 aid=1)
[  845.941701] wlan0: associated
[  845.942198] cfg80211: Calling CRDA for country: US
[  845.952069] cfg80211: Updating information on frequency 2412 MHz for a 20 MHz width channel with regulatory rule:
[  845.952080] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  845.952086] cfg80211: Updating information on frequency 2417 MHz for a 20 MHz width channel with regulatory rule:
[  845.952090] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  845.952094] cfg80211: Updating information on frequency 2422 MHz for a 20 MHz width channel with regulatory rule:
[  845.952099] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  845.952103] cfg80211: Updating information on frequency 2427 MHz for a 20 MHz width channel with regulatory rule:
[  845.952107] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  845.952111] cfg80211: Updating information on frequency 2432 MHz for a 20 MHz width channel with regulatory rule:
[  845.952115] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  845.952118] cfg80211: Updating information on frequency 2437 MHz for a 20 MHz width channel with regulatory rule:
[  845.952122] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  845.952126] cfg80211: Updating information on frequency 2442 MHz for a 20 MHz width channel with regulatory rule:
[  845.952130] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  845.952134] cfg80211: Updating information on frequency 2447 MHz for a 20 MHz width channel with regulatory rule:
[  845.952138] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  845.952141] cfg80211: Updating information on frequency 2452 MHz for a 20 MHz width channel with regulatory rule:
[  845.952145] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  845.952149] cfg80211: Updating information on frequency 2457 MHz for a 20 MHz width channel with regulatory rule:
[  845.952153] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  845.952157] cfg80211: Updating information on frequency 2462 MHz for a 20 MHz width channel with regulatory rule:
[  845.952161] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  845.952164] cfg80211: Disabling freq 2467 MHz
[  845.952167] cfg80211: Disabling freq 2472 MHz
[  845.952170] cfg80211: Disabling freq 2484 MHz
[  845.952180] ath: regdomain 0x8348 updated by CountryIE
[  845.952183] ath: EEPROM regdomain: 0x8348
[  845.952186] ath: EEPROM indicates we should expect a country code
[  845.952190] ath: doing EEPROM country->regdmn map search
[  845.952194] ath: country maps to regdmn code: 0x3a
[  845.952197] ath: Country alpha2 being used: US
[  845.952200] ath: Regpair used: 0x3a
[  845.952299] cfg80211: Regulatory domain changed to country: US
[  845.952302] cfg80211:  (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[  845.952307] cfg80211:  (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[  845.952311] cfg80211:  (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 1700 mBm)
[  845.952315] cfg80211:  (5250000 KHz - 5330000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[  845.952319] cfg80211:  (5490000 KHz - 5600000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[  845.952323] cfg80211:  (5650000 KHz - 5710000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[  845.952327] cfg80211:  (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 3000 mBm)
[ 1519.235254] cfg80211: All devices are disconnected, going to restore regulatory settings
[ 1519.235274] cfg80211: Restoring regulatory settings
[ 1519.243286] cfg80211: Calling CRDA to update world regulatory domain
[ 1519.256079] cfg80211: Ignoring regulatory request Set by core since the driver uses its own custom regulatory domain
[ 1519.259963] cfg80211: World regulatory domain updated:
[ 1519.259971] cfg80211:  (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[ 1519.259980] cfg80211:  (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 1519.259988] cfg80211:  (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 1519.259996] cfg80211:  (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 1519.260003] cfg80211:  (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 1519.260011] cfg80211:  (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 1534.631584] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[ 1552.264680] wlan0: authenticate with fc:75:16:43:28:f0
[ 1552.273262] wlan0: send auth to fc:75:16:43:28:f0 (try 1/3)
[ 1552.275671] wlan0: authenticated
[ 1552.281648] wlan0: associate with fc:75:16:43:28:f0 (try 1/3)
[ 1552.284733] wlan0: RX AssocResp from fc:75:16:43:28:f0 (capab=0x411 status=0 aid=1)
[ 1552.284914] wlan0: associated
[ 1552.285386] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[ 1552.286300] cfg80211: Calling CRDA for country: US
[ 1552.301122] cfg80211: Updating information on frequency 2412 MHz for a 20 MHz width channel with regulatory rule:
[ 1552.301137] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[ 1552.301143] cfg80211: Updating information on frequency 2417 MHz for a 20 MHz width channel with regulatory rule:
[ 1552.301150] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[ 1552.301155] cfg80211: Updating information on frequency 2422 MHz for a 20 MHz width channel with regulatory rule:
[ 1552.301161] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[ 1552.301166] cfg80211: Updating information on frequency 2427 MHz for a 20 MHz width channel with regulatory rule:
[ 1552.301172] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[ 1552.301178] cfg80211: Updating information on frequency 2432 MHz for a 20 MHz width channel with regulatory rule:
[ 1552.301183] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[ 1552.301188] cfg80211: Updating information on frequency 2437 MHz for a 20 MHz width channel with regulatory rule:
[ 1552.301194] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[ 1552.301199] cfg80211: Updating information on frequency 2442 MHz for a 20 MHz width channel with regulatory rule:
[ 1552.301204] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[ 1552.301209] cfg80211: Updating information on frequency 2447 MHz for a 20 MHz width channel with regulatory rule:
[ 1552.301214] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[ 1552.301219] cfg80211: Updating information on frequency 2452 MHz for a 20 MHz width channel with regulatory rule:
[ 1552.301225] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[ 1552.301230] cfg80211: Updating information on frequency 2457 MHz for a 20 MHz width channel with regulatory rule:
[ 1552.301235] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[ 1552.301240] cfg80211: Updating information on frequency 2462 MHz for a 20 MHz width channel with regulatory rule:
[ 1552.301245] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[ 1552.301250] cfg80211: Disabling freq 2467 MHz
[ 1552.301254] cfg80211: Disabling freq 2472 MHz
[ 1552.301258] cfg80211: Disabling freq 2484 MHz
[ 1552.301270] ath: regdomain 0x8348 updated by CountryIE
[ 1552.301274] ath: EEPROM regdomain: 0x8348
[ 1552.301278] ath: EEPROM indicates we should expect a country code
[ 1552.301283] ath: doing EEPROM country->regdmn map search
[ 1552.301288] ath: country maps to regdmn code: 0x3a
[ 1552.301293] ath: Country alpha2 being used: US
[ 1552.301297] ath: Regpair used: 0x3a
[ 1552.301403] cfg80211: Regulatory domain changed to country: US
[ 1552.301408] cfg80211:  (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[ 1552.301414] cfg80211:  (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[ 1552.301419] cfg80211:  (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 1700 mBm)
[ 1552.301425] cfg80211:  (5250000 KHz - 5330000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 1552.301430] cfg80211:  (5490000 KHz - 5600000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 1552.301436] cfg80211:  (5650000 KHz - 5710000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 1552.301441] cfg80211:  (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 3000 mBm)

[Peter]

Looks like a clean drop of connection. Like a bug in NetworkManager or the kernel itself.
You could try a newer kernel (or an older one) and see if that helps.

Linux 3.8 totally kills my Intel 5100 AGN wifi card for example.
Like I can't even use Linux with it at all.

Year of the Linux desktop.

[quser]

I use Transmission without problems. My wireless connection never drops with or without run Transmission.