Problems with Atheros ar9285 wireless adapter

Hello Windows 7 works perfectly with my wireless adapter. The problem comes when I dual boot into Mint 12. I can always connect to the internet after startup. After a while, the connection will be lost from 4 seconds to up to about 20 minutes. Sometimes it asks for the wpa2 password, but not always. After the connection reconnects itself, it will disconnect again after several minutes. Some things I have tried: Disabling wireless n on the router (but still allowing b and g) has no significant change on the problems. Other information: Code: ============ lspci ============ 00:00.0 Host bridge [0600]: Advanced Micro Devices [AMD] Family 14h Processor Root Complex [1022:1510]         Subsystem: Acer Incorporated [ALI] Device [1025:0602] 00:01.0 VGA compatible controller [0300]: ATI Technologies Inc Device [1002:9804]         Subsystem: Acer Incorporated [ALI] Device [1025:0602]         Kernel driver in use: radeon         Kernel modules: radeon 00:11.0 SATA controller [0106]: ATI Technologies Inc SB7x0/SB8x0/SB9x0 SATA Controller [AHCI mode] [1002:4391]         Subsystem: Acer Incorporated [ALI] Device [1025:0602]         Kernel driver in use: ahci         Kernel modules: ahci 00:12.0 USB Controller [0c03]: ATI Technologies Inc SB7x0/SB8x0/SB9x0 USB OHCI0 Controller [1002:4397]         Subsystem: Acer Incorporated [ALI] Device [1025:0602]         Kernel driver in use: ohci_hcd 00:12.2 USB Controller [0c03]: ATI Technologies Inc SB7x0/SB8x0/SB9x0 USB EHCI Controller [1002:4396]         Subsystem: Acer Incorporated [ALI] Device [1025:0602]         Kernel driver in use: ehci_hcd 00:13.0 USB Controller [0c03]: ATI Technologies Inc SB7x0/SB8x0/SB9x0 USB OHCI0 Controller [1002:4397]         Subsystem: Acer Incorporated [ALI] Device [1025:0602]         Kernel driver in use: ohci_hcd 00:13.2 USB Controller [0c03]: ATI Technologies Inc SB7x0/SB8x0/SB9x0 USB EHCI Controller [1002:4396]         Subsystem: Acer Incorporated [ALI] Device [1025:0602]         Kernel driver in use: ehci_hcd 00:14.0 SMBus [0c05]: ATI Technologies Inc SBx00 SMBus Controller [1002:4385] (rev 42)         Subsystem: Acer Incorporated [ALI] Device [1025:0602]         Kernel driver in use: piix4_smbus         Kernel modules: sp5100_tco, i2c-piix4 00:14.2 Audio device [0403]: ATI Technologies Inc SBx00 Azalia (Intel HDA) [1002:4383] (rev 40)         Subsystem: Acer Incorporated [ALI] Device [1025:0602]         Kernel driver in use: HDA Intel         Kernel modules: snd-hda-intel 00:14.3 ISA bridge [0601]: ATI Technologies Inc SB7x0/SB8x0/SB9x0 LPC host controller [1002:439d] (rev 40)         Subsystem: Acer Incorporated [ALI] Device [1025:0602] 00:14.4 PCI bridge [0604]: ATI Technologies Inc SBx00 PCI to PCI Bridge [1002:4384] (rev 40) 00:15.0 PCI bridge [0604]: ATI Technologies Inc SB700/SB800/SB900 PCI to PCI bridge (PCIE port 0) [1002:43a0]         Kernel driver in use: pcieport         Kernel modules: shpchp 00:15.2 PCI bridge [0604]: ATI Technologies Inc SB900 PCI to PCI bridge (PCIE port 2) [1002:43a2]         Kernel driver in use: pcieport         Kernel modules: shpchp 00:15.3 PCI bridge [0604]: ATI Technologies Inc SB900 PCI to PCI bridge (PCIE port 3) [1002:43a3]         Kernel driver in use: pcieport         Kernel modules: shpchp 00:18.0 Host bridge [0600]: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 0 [1022:1700] (rev 43) 00:18.1 Host bridge [0600]: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 1 [1022:1701] 00:18.2 Host bridge [0600]: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 2 [1022:1702] 00:18.3 Host bridge [0600]: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 3 [1022:1703]         Kernel driver in use: k10temp         Kernel modules: k10temp 00:18.4 Host bridge [0600]: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 4 [1022:1704] 00:18.5 Host bridge [0600]: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 6 [1022:1718] 00:18.6 Host bridge [0600]: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 5 [1022:1716] 00:18.7 Host bridge [0600]: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 7 [1022:1719] 06:00.0 Ethernet controller [0200]: Atheros Communications AR8152 v2.0 Fast Ethernet [1969:2062] (rev c1)         Subsystem: Acer Incorporated [ALI] Device [1025:0602]         Kernel driver in use: atl1c         Kernel modules: atl1c 07:00.0 Network controller [0280]: Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) [168c:002b] (rev 01)         Subsystem: Lite-On Communications Inc Device [11ad:6631]         Kernel driver in use: ath9k         Kernel modules: ath9k ============ lsusb ============ Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 004: ID 0402:7675 ALi Corp. Bus 001 Device 003: ID 054c:0243 Sony Corp. MicroVault Flash Drive ============ lsmod ============ Module                  Size  Used by bnep                  17923  2 rfcomm                38408  0 bluetooth            148839  10 bnep,rfcomm joydev                17393  0 parport_pc            32114  0 ppdev                  12849  0 snd_hda_codec_conexant    52418  1 snd_hda_intel          24262  2 snd_hda_codec          91754  2 snd_hda_codec_conexant,snd_hda_intel snd_hwdep              13276  1 snd_hda_codec binfmt_misc            17292  1 snd_pcm                80468  2 snd_hda_intel,snd_hda_codec arc4                  12473  2 snd_seq_midi          13132  0 snd_rawmidi            25241  1 snd_seq_midi snd_seq_midi_event    14475  1 snd_seq_midi snd_seq                51567  2 snd_seq_midi,snd_seq_midi_event snd_timer              28932  2 snd_pcm,snd_seq uvcvideo              67271  0 videodev              85626  1 uvcvideo snd_seq_device        14172  3 snd_seq_midi,snd_rawmidi,snd_seq ath9k                112711  0 mac80211              272785  1 ath9k psmouse                73673  0 ath9k_common          13599  1 ath9k serio_raw              12990  0 ath9k_hw              293893  2 ath9k,ath9k_common snd                    55902  13 snd_hda_codec_conexant,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device ath                    19387  2 ath9k,ath9k_hw k10temp                12990  0 cfg80211              172392  3 ath9k,mac80211,ath sp5100_tco            13495  0 soundcore              12600  1 snd radeon                925020  3 snd_page_alloc        14115  2 snd_hda_intel,snd_pcm i2c_piix4              13093  0 ttm                    65224  1 radeon drm_kms_helper        32889  1 radeon drm                  192226  5 radeon,ttm,drm_kms_helper i2c_algo_bit          13199  1 radeon sparse_keymap          13658  0 video                  18908  0 wmi                    18744  0 lp                    17455  0 parport                40930  3 parport_pc,ppdev,lp ums_realtek            13096  0 usb_storage            44173  2 ums_realtek uas                    17699  0 ahci                  21634  2 libahci                25727  1 ahci atl1c                  36638  0 ============ dmesg-firmware ============ ============ kernel version ============ 3.0.0-12-generic ============ ifconfig ============ eth0      Link encap:Ethernet  HWaddr b8:70:f4:a9:92:a9            UP BROADCAST MULTICAST  MTU:1500  Metric:1           RX packets:0 errors:0 dropped:0 overruns:0 frame:0           TX packets:0 errors:0 dropped:0 overruns:0 carrier:0           collisions:0 txqueuelen:1000           RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)           Interrupt:41 lo        Link encap:Local Loopback            inet addr:127.0.0.1  Mask:255.0.0.0           inet6 addr: ::1/128 Scope:Host           UP LOOPBACK RUNNING  MTU:16436  Metric:1           RX packets:4233 errors:0 dropped:0 overruns:0 frame:0           TX packets:4233 errors:0 dropped:0 overruns:0 carrier:0           collisions:0 txqueuelen:0           RX bytes:382702 (382.7 KB)  TX bytes:382702 (382.7 KB) wlan0    Link encap:Ethernet  HWaddr d0:df:9a:58:de:8e            inet addr:192.168.1.135  Bcast:192.168.1.255  Mask:255.255.255.0           inet6 addr: fe80::d2df:9aff:fe58:de8e/64 Scope:Link           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1           RX packets:24613 errors:0 dropped:0 overruns:0 frame:0           TX packets:19683 errors:0 dropped:0 overruns:0 carrier:0           collisions:0 txqueuelen:1000           RX bytes:15478502 (15.4 MB)  TX bytes:3846131 (3.8 MB) ============ iwconfig ============ wlan0    IEEE 802.11bgn  ESSID:"medcent"            Mode:Managed  Frequency:2.412 GHz  Access Point: 98:FC:11:52:E1:5E            Bit Rate=26 Mb/s  Tx-Power=14 dBm            Retry  long limit:7  RTS thr:off  Fragment thr:off           Power Management:off           Link Quality=49/70  Signal level=-61 dBm            Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0           Tx excessive retries:2  Invalid misc:6  Missed beacon:0 Thanks in advance!

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