In my home the computers running Windows have no problem connecting to the WiFi we pay. However, my Ubuntu 14.04 fail to connect every 2-3 days. A reset of the router solves the issue, but that's very annoying for many reasons.
I have focused on this part from /var/log/kern.log:
Jun 1 20:39:22 gsamaras-A15 kernel: [ 283.485193] wlan0: deauthenticating from 38:22:9d:c5:ca:8c by local choice (Reason: 3=DEAUTH_LEAVING)
Jun 1 20:39:22 gsamaras-A15 kernel: [ 283.506151] cfg80211: Calling CRDA to update world regulatory domain
Jun 1 20:39:22 gsamaras-A15 kernel: [ 283.512504] cfg80211: World regulatory domain updated:
Jun 1 20:39:22 gsamaras-A15 kernel: [ 283.512514] cfg80211: DFS Master region: unset
Jun 1 20:39:22 gsamaras-A15 kernel: [ 283.512518] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_tim$
Jun 1 20:39:22 gsamaras-A15 kernel: [ 283.512527] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
Jun 1 20:39:22 gsamaras-A15 kernel: [ 283.512534] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
Jun 1 20:39:22 gsamaras-A15 kernel: [ 283.512540] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm), (N/A)
Jun 1 20:39:22 gsamaras-A15 kernel: [ 283.512546] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
Jun 1 20:39:22 gsamaras-A15 kernel: [ 283.512552] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
Jun 1 20:39:24 gsamaras-A15 kernel: [ 286.334965] wlan0: authenticate with 38:22:9d:c5:ca:8c
Jun 1 20:39:25 gsamaras-A15 kernel: [ 286.706803] wlan0: send auth to 38:22:9d:c5:ca:8c (try 1/3)
Jun 1 20:39:25 gsamaras-A15 kernel: [ 286.708593] wlan0: authenticated
Jun 1 20:39:25 gsamaras-A15 kernel: [ 286.710501] wlan0: associate with 38:22:9d:c5:ca:8c (try 1/3)
Jun 1 20:39:25 gsamaras-A15 kernel: [ 286.732307] wlan0: RX AssocResp from 38:22:9d:c5:ca:8c (capab=0x431 status=0 aid=2)
Jun 1 20:39:25 gsamaras-A15 kernel: [ 286.732545] wlan0: associated
Does anyone please know what can be the issue?
Output of lspci -v:
00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09)
Subsystem: Pegatron Device 20ca
Flags: bus master, fast devsel, latency 0
Capabilities: <access denied>
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200/2nd Generation Core Processor Family PCI Express Root Port (rev 09) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
Capabilities: <access denied>
Kernel driver in use: pcieport
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) (prog-if 00 [VGA controller])
Subsystem: Pegatron Device 20c5
Flags: bus master, fast devsel, latency 0, IRQ 28
Memory at f7800000 (64-bit, non-prefetchable) [size=4M]
Memory at e0000000 (64-bit, prefetchable) [size=256M]
I/O ports at f000 [size=64]
Expansion ROM at <unassigned> [disabled]
Capabilities: <access denied>
Kernel driver in use: i915
00:16.0 Communication controller: Intel Corporation 7 Series/C210 Series Chipset Family MEI Controller #1 (rev 04)
Subsystem: Pegatron Device 20ca
Flags: bus master, fast devsel, latency 0, IRQ 27
Memory at f7d0a000 (64-bit, non-prefetchable) [size=16]
Capabilities: <access denied>
Kernel driver in use: mei_me
00:1a.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #2 (rev 04) (prog-if 20 [EHCI])
Subsystem: Pegatron Device 20ca
Flags: bus master, medium devsel, latency 0, IRQ 16
Memory at f7d08000 (32-bit, non-prefetchable) [size=1K]
Capabilities: <access denied>
Kernel driver in use: ehci-pci
00:1b.0 Audio device: Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller (rev 04)
Subsystem: Pegatron Device 20de
Flags: bus master, fast devsel, latency 0, IRQ 29
Memory at f7d00000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: snd_hda_intel
00:1c.0 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 1 (rev c4) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=02, subordinate=02, sec-latency=0
I/O behind bridge: 00002000-00002fff
Memory behind bridge: dfb00000-dfcfffff
Prefetchable memory behind bridge: 00000000dfd00000-00000000dfefffff
Capabilities: <access denied>
Kernel driver in use: pcieport
00:1c.1 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 2 (rev c4) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=03, subordinate=03, sec-latency=0
I/O behind bridge: 0000e000-0000efff
Memory behind bridge: f7c00000-f7cfffff
Capabilities: <access denied>
Kernel driver in use: pcieport
00:1c.2 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 3 (rev c4) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=04, subordinate=04, sec-latency=0
I/O behind bridge: 0000d000-0000dfff
Memory behind bridge: f0100000-f04fffff
Prefetchable memory behind bridge: 00000000f0000000-00000000f00fffff
Capabilities: <access denied>
Kernel driver in use: pcieport
00:1d.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #1 (rev 04) (prog-if 20 [EHCI])
Subsystem: Pegatron Device 20ca
Flags: bus master, medium devsel, latency 0, IRQ 23
Memory at f7d07000 (32-bit, non-prefetchable) [size=1K]
Capabilities: <access denied>
Kernel driver in use: ehci-pci
00:1f.0 ISA bridge: Intel Corporation HM75 Express Chipset LPC Controller (rev 04)
Subsystem: Pegatron Device 20ca
Flags: bus master, medium devsel, latency 0
Capabilities: <access denied>
Kernel driver in use: lpc_ich
00:1f.2 SATA controller: Intel Corporation 7 Series Chipset Family 6-port SATA Controller [AHCI mode] (rev 04) (prog-if 01 [AHCI 1.0])
Subsystem: Pegatron Device 20ca
Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 26
I/O ports at f0b0 [size=8]
I/O ports at f0a0 [size=4]
I/O ports at f090 [size=8]
I/O ports at f080 [size=4]
I/O ports at f060 [size=32]
Memory at f7d06000 (32-bit, non-prefetchable) [size=2K]
Capabilities: <access denied>
Kernel driver in use: ahci
00:1f.3 SMBus: Intel Corporation 7 Series/C210 Series Chipset Family SMBus Controller (rev 04)
Subsystem: Pegatron Device 20ca
Flags: medium devsel, IRQ 4
Memory at f7d05000 (64-bit, non-prefetchable) [size=256]
I/O ports at f040 [size=32]
03:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8188CE 802.11b/g/n WiFi Adapter (rev 01)
Subsystem: AzureWave AW-NE139H Half-size Mini PCIe Card
Flags: bus master, fast devsel, latency 0, IRQ 17
I/O ports at e000 [size=256]
Memory at f7c00000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: rtl8192ce
04:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 07)
Subsystem: Realtek Semiconductor Co., Ltd. Device 0123
Flags: bus master, fast devsel, latency 0, IRQ 25
I/O ports at d000 [size=256]
Memory at f0004000 (64-bit, prefetchable) [size=4K]
Memory at f0000000 (64-bit, prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: r8169
