networking - "configuring network interfaces", prompting for password - Ask Ubuntu

it happens few times each day. wifi stops working, disconnects, asks password , doesn't accept correct one. can't connect open wifi though can see it.

the thing works physically removing network card usb , putting again.

how diagnose , correct problem?

my system kubuntu 16.04.

result of lsusb, when wifi dies (atheros device):

   bus 003 device 005: id 1058:0748 western digital technologies, inc. passport (wdbkxh, wdby8l)    bus 003 device 001: id 1d6b:0002 linux foundation 2.0 root hub    bus 007 device 001: id 1d6b:0001 linux foundation 1.1 root hub    bus 006 device 001: id 1d6b:0001 linux foundation 1.1 root hub    bus 002 device 033: id 0cf3:1006 atheros communications, inc. tp-link tl-wn322g v3 / tl-wn422g v2 802.11g [atheros ar9271]     bus 002 device 001: id 1d6b:0002 linux foundation 2.0 root hub    bus 005 device 001: id 1d6b:0001 linux foundation 1.1 root hub    bus 001 device 001: id 1d6b:0002 linux foundation 2.0 root hub    bus 004 device 003: id 04f9:0027 brother industries, ltd hl-2030 laser printer    bus 004 device 001: id 1d6b:0001 linux foundation 1.1 root hub    bus 009 device 001: id 1d6b:0003 linux foundation 3.0 root hub    bus 008 device 012: id 045e:00db microsoft corp. natural ergonomic keyboard 4000 v1.0    bus 008 device 001: id 1d6b:0002 linux foundation 2.0 root hub 

result of dmesg (ath9k , wlan0 culprits):

    [749216.052827] smpboot: cpu 3 offline     [749216.063545] broke affinity irq 17     [749216.063551] broke affinity irq 19     [749216.063567] broke affinity irq 24     [749216.063570] broke affinity irq 26     [749216.064605] smpboot: cpu 4 offline     [749216.078758] broke affinity irq 1     [749216.078765] broke affinity irq 9     [749216.078768] broke affinity irq 12     [749216.078771] broke affinity irq 14     [749216.078777] broke affinity irq 17     [749216.078780] broke affinity irq 18     [749216.078783] broke affinity irq 19     [749216.078799] broke affinity irq 24     [749216.078803] broke affinity irq 26     [749216.079841] smpboot: cpu 5 offline     [749216.091770] acpi: low-level resume complete     [749216.091796] pm: restoring platform nvs memory     [749216.091813] pci-dma: resuming gart iommu     [749216.091813] pci-dma: restoring gart aperture settings     [749216.091819] lvt offset 0 assigned vector 0x400     [749216.098039] microcode: cpu0: new patch_level=0x0600084f     [749216.098091] enabling non-boot cpus ...     [749216.115914] x86: booting smp configuration:     [749216.115915] smpboot: booting node 0 processor 1 apic 0x1     [749216.118885]  cache: parent cpu1 should not sleeping     [749216.119052] cpu1     [749216.140000] smpboot: booting node 0 processor 2 apic 0x2     [749216.142882]  cache: parent cpu2 should not sleeping     [749216.148271] microcode: cpu2: new patch_level=0x0600084f     [749216.148312] cpu2     [749216.168015] smpboot: booting node 0 processor 3 apic 0x3     [749216.170934]  cache: parent cpu3 should not sleeping     [749216.171106] cpu3     [749216.188062] smpboot: booting node 0 processor 4 apic 0x4     [749216.190998]  cache: parent cpu4 should not sleeping     [749216.196399] microcode: cpu4: new patch_level=0x0600084f     [749216.196443] cpu4     [749216.216089] smpboot: booting node 0 processor 5 apic 0x5     [749216.219055]  cache: parent cpu5 should not sleeping     [749216.219225] cpu5     [749216.226852] acpi: waking system sleep state s3     [749216.227251] ahci 0000:00:11.0: set sata ahci mode     [749216.227288] ohci-pci 0000:00:12.0: system wakeup disabled acpi     [749216.227307] ohci-pci 0000:00:13.0: system wakeup disabled acpi     [749216.227403] ohci-pci 0000:00:14.5: system wakeup disabled acpi     [749216.227443] ohci-pci 0000:00:16.0: system wakeup disabled acpi     [749216.239896] ehci-pci 0000:00:16.2: system wakeup disabled acpi     [749216.239899] ehci-pci 0000:00:12.2: system wakeup disabled acpi     [749216.240005] pcieport 0000:00:04.0: system wakeup disabled acpi     [749216.240025] ehci-pci 0000:00:13.2: system wakeup disabled acpi     [749216.240132] pm: noirq resume of devices complete after 13.040 msecs     [749216.240638] pm: resume of devices complete after 0.491 msecs     [749216.240763] rtc_cmos 00:02: system wakeup disabled acpi     [749216.240875] usb usb8: root hub lost power or reset     [749216.240876] usb usb9: root hub lost power or reset     [749216.240878] pcieport 0000:00:09.0: system wakeup disabled acpi     [749216.250500] [drm] probing gen 2 caps device 1002:5a16 = 31cd02/0     [749216.250502] [drm] pcie gen 2 link speeds enabled     [749216.254068] [drm] pcie gart of 2048m enabled (table @ 0x00000000002e8000).     [749216.254165] radeon 0000:01:00.0: wb enabled     [749216.254166] radeon 0000:01:00.0: fence driver on ring 0 use gpu addr 0x0000000040000c00 , cpu addr 0xffff8800cf728c00     [749216.254168] radeon 0000:01:00.0: fence driver on ring 1 use gpu addr 0x0000000040000c04 , cpu addr 0xffff8800cf728c04     [749216.254169] radeon 0000:01:00.0: fence driver on ring 2 use gpu addr 0x0000000040000c08 , cpu addr 0xffff8800cf728c08     [749216.254170] radeon 0000:01:00.0: fence driver on ring 3 use gpu addr 0x0000000040000c0c , cpu addr 0xffff8800cf728c0c     [749216.254171] radeon 0000:01:00.0: fence driver on ring 4 use gpu addr 0x0000000040000c10 , cpu addr 0xffff8800cf728c10     [749216.254656] radeon 0000:01:00.0: fence driver on ring 5 use gpu addr 0x0000000000075a18 , cpu addr 0xffffc90001835a18     [749216.259852] sd 0:0:0:0: [sda] starting disk     [749216.259878] sd 1:0:0:0: [sdb] starting disk     [749216.274626] radeon 0000:01:00.0: fence driver on ring 6 use gpu addr 0x0000000040000c18 , cpu addr 0xffff8800cf728c18     [749216.274627] radeon 0000:01:00.0: fence driver on ring 7 use gpu addr 0x0000000040000c1c , cpu addr 0xffff8800cf728c1c     [749216.428086] ata5.00: acpi cmd ef/03:08:00:00:00:a0 (set features) filtered out     [749216.428088] ata5.00: acpi cmd ef/03:22:00:00:00:a0 (set features) filtered out     [749216.444189] ata5.00: configured udma/33     [749216.575869] ata4: sata link down (sstatus 0 scontrol 300)     [749216.575913] ata3: sata link down (sstatus 0 scontrol 300)     [749216.723940] usb 8-2: reset low-speed usb device number 12 using xhci_hcd     [749216.777154] [drm] ring test on 0 succeeded in 1 usecs     [749216.777157] [drm] ring test on 1 succeeded in 1 usecs     [749216.777161] [drm] ring test on 2 succeeded in 1 usecs     [749216.777173] [drm] ring test on 3 succeeded in 9 usecs     [749216.777178] [drm] ring test on 4 succeeded in 3 usecs     [749216.778667] r8169 0000:03:00.0 eth7: link down     [749216.832445] usb 2-1: ath9k_htc: transferred fw: ath9k_htc/htc_9271-1.4.0.fw, size: 51008       [749216.952880] [drm] ring test on 5 succeeded in 1 usecs     [749216.952897] [drm] uvd initialized successfully.     [749217.020479] usb 8-2: ep 0x81 - rounding interval 64 microframes, ep desc says 80 microframes     [749217.020483] usb 8-2: ep 0x82 - rounding interval 64 microframes, ep desc says 80 microframes     [749217.062064] [drm] ring test on 6 succeeded in 12 usecs     [749217.062076] [drm] ring test on 7 succeeded in 4 usecs     [749217.062077] [drm] vce initialized successfully.     [749217.062105] [drm] ib test on ring 0 succeeded in 0 usecs     [749217.062128] [drm] ib test on ring 1 succeeded in 0 usecs     [749217.062151] [drm] ib test on ring 2 succeeded in 0 usecs     [749217.062180] [drm] ib test on ring 3 succeeded in 0 usecs     [749217.062204] [drm] ib test on ring 4 succeeded in 0 usecs     [749217.083382] ath9k_htc 2-1:1.0: ath9k_htc: htc initialized 33 credits     [749217.712061] [drm] ib test on ring 5 succeeded     [749218.212115] [drm] ib test on ring 6 succeeded     [749218.712162] [drm] ib test on ring 7 succeeded     [749218.963725] pm: resume of devices complete after 2722.782 msecs     [749218.964440] pm: finishing wakeup.     [749218.964442] restarting tasks ... done.     [749220.556312] ata1: sata link 3.0 gbps (sstatus 123 scontrol 300)     [749220.562827] ata1.00: configured udma/133     [749223.708652] ata2: sata link 1.5 gbps (sstatus 113 scontrol 310)     [749223.708729] sd 1:0:0:0: [sdb] start/stop unit failed: result: hostbyte=did_bad_target driverbyte=driver_ok     [749223.746993] ipv6: addrconf(netdev_up): enp4s6: link not ready     [749223.748788] ipv6: addrconf(netdev_up): eth7: link not ready     [749223.870717] r8169 0000:03:00.0 eth7: link down     [749223.870826] ipv6: addrconf(netdev_up): eth7: link not ready     [749223.872789] ipv6: addrconf(netdev_up): wlan0: link not ready     [749224.032812] ipv6: addrconf(netdev_up): wlan0: link not ready     [749224.077325] ipv6: addrconf(netdev_up): wlan0: link not ready     [749225.168521] wlan0: authenticate e8:94:f6:ca:dd:04     [749225.316786] wlan0: send auth e8:94:f6:ca:dd:04 (try 1/3)     [749225.318975] wlan0: authenticated     [749225.320845] wlan0: associate e8:94:f6:ca:dd:04 (try 1/3)     [749225.324848] wlan0: rx assocresp e8:94:f6:ca:dd:04 (capab=0x431 status=0 aid=2)     [749225.332465] wlan0: associated     [749225.332523] ipv6: addrconf(netdev_change): wlan0: link becomes ready     [749453.178896] sd 1:0:0:0: [sdb] tag#5 failed result: hostbyte=did_bad_target driverbyte=driver_ok     [749453.178905] sd 1:0:0:0: [sdb] tag#5 cdb: ata command pass through(16) 85 06 2c 00 00 00 00 00 00 00 00 00 00 00 e5 00     [749501.562825] wlan0: deauthenticating e8:94:f6:ca:dd:04 local choice (reason: 3=deauth_leaving)     [749501.641285] cfg80211: world regulatory domain updated:     [749501.641287] cfg80211:  dfs master region: unset     [749501.641289] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)     [749501.641293] cfg80211:   (2402000 khz - 2472000 khz @ 40000 khz), (n/a, 2000 mbm), (n/a)     [749501.641296] cfg80211:   (2457000 khz - 2482000 khz @ 40000 khz), (n/a, 2000 mbm), (n/a)     [749501.641298] cfg80211:   (2474000 khz - 2494000 khz @ 20000 khz), (n/a, 2000 mbm), (n/a)     [749501.641300] cfg80211:   (5170000 khz - 5250000 khz @ 80000 khz, 160000 khz auto), (n/a, 2000 mbm), (n/a)     [749501.641302] cfg80211:   (5250000 khz - 5330000 khz @ 80000 khz, 160000 khz auto), (n/a, 2000 mbm), (0 s)     [749501.641304] cfg80211:   (5490000 khz - 5730000 khz @ 160000 khz), (n/a, 2000 mbm), (0 s)     [749501.641306] cfg80211:   (5735000 khz - 5835000 khz @ 80000 khz), (n/a, 2000 mbm), (n/a)     [749501.641308] cfg80211:   (57240000 khz - 63720000 khz @ 2160000 khz), (n/a, 0 mbm), (n/a)     [749502.735100] wlan0: authenticate e8:94:f6:ca:dd:04     [749502.904046] wlan0: send auth e8:94:f6:ca:dd:04 (try 1/3)     [749502.906145] wlan0: authenticated     [749502.910125] wlan0: associate e8:94:f6:ca:dd:04 (try 1/3)     [749502.914198] wlan0: rx assocresp e8:94:f6:ca:dd:04 (capab=0x431 status=0 aid=2)     [749502.920385] wlan0: associated     [749512.922459] wlan0: deauthenticating e8:94:f6:ca:dd:04 local choice (reason: 3=deauth_leaving)     [749512.996216] cfg80211: world regulatory domain updated:     [749512.996220] cfg80211:  dfs master region: unset     [749512.996221] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)     [749512.996224] cfg80211:   (2402000 khz - 2472000 khz @ 40000 khz), (n/a, 2000 mbm), (n/a)     [749512.996226] cfg80211:   (2457000 khz - 2482000 khz @ 40000 khz), (n/a, 2000 mbm), (n/a)     [749512.996227] cfg80211:   (2474000 khz - 2494000 khz @ 20000 khz), (n/a, 2000 mbm), (n/a)     [749512.996229] cfg80211:   (5170000 khz - 5250000 khz @ 80000 khz, 160000 khz auto), (n/a, 2000 mbm), (n/a)     [749512.996231] cfg80211:   (5250000 khz - 5330000 khz @ 80000 khz, 160000 khz auto), (n/a, 2000 mbm), (0 s)     [749512.996233] cfg80211:   (5490000 khz - 5730000 khz @ 160000 khz), (n/a, 2000 mbm), (0 s)     [749512.996235] cfg80211:   (5735000 khz - 5835000 khz @ 80000 khz), (n/a, 2000 mbm), (n/a)     [749512.996236] cfg80211:   (57240000 khz - 63720000 khz @ 2160000 khz), (n/a, 0 mbm), (n/a)