Eu li outras perguntas no askUbuntu, mas não consegui resolver o problema, pois sou novo no Linux.
O problema é que a conexão Wifi no Ubuntu 14.04 é instável. Ele se conecta ao wifi por um tempo, mas após 5 minutos, simplesmente não consegue encontrar a maioria das redes (encontra algumas delas).
Acabei de comprar no Mouse Computer. Mas como é estável no Windows 8.1 (inicialização dupla), não parece ser um problema de hardware.
Eu tentei as soluções abaixo.
Adicione "opções iwlwifi 11n_disabled = 1" em /etc/modprobe.d/iwlwifi.conf
Ignorar IPv6
Reinicie o NetworkManager
Nenhum deles resolveu o problema.
Abaixo segue as informações do meu Ubuntu.
======== Wireless-Info START ========
System-Info ~~~~~~~~~~~~~~~~~~~~~~~~
yuu 3.13.0-37-generic x86_64, Ubuntu 14.04.1 LTS, trusty
CPU : Intel(R) Core(TM) i7-4712MQ CPU @ 2.30GHz
Memory : 15971 MB
Uptime : 21:43:43 up 1:48, 1 user, load average: 0.05, 0.05, 0.05
lspci ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
02:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 0c)
Subsystem: QUANTA Computer Inc Device [152d:0999]
Kernel driver in use: r8169
--
09:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter [10ec:b723]
Subsystem: Realtek Semiconductor Co., Ltd. Device [10ec:b729]
Kernel driver in use: rtl8723be
lsusb ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Bus 002 Device 002: ID 8087:8000 Intel Corp.
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 8087:8008 Intel Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 004: ID 0bda:b002 Realtek Semiconductor Corp.
Bus 003 Device 007: ID 058f:6387 Alcor Micro Corp. Flash Drive
Bus 003 Device 002: ID 5986:0523 Acer, Inc
Bus 003 Device 006: ID 093a:2510 Pixart Imaging, Inc. Optical Mouse
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
PCMCIA Card Info ~~~~~~~~~~~~~~~~~~~
iwconfig ~~~~~~~~~~~~~~~~~~~~~~~~~~~
wlan0 IEEE 802.11bgn ESSID:off/any
Mode:Managed Access Point: Not-Associated Tx-Power=20 dBm
Retry long limit:7 RTS thr=2347 B Fragment thr:off
Power Management:off
rfkill ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Interface Soft blocked Hard blocked
1: phy0: Wireless LAN no no
2: hci0: Bluetooth no no
lsmod ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
iwlwifi 169932 0
rtl8723be 85118 0
btcoexist 50304 1 rtl8723be
rtl8723_common 23361 1 rtl8723be
rtl_pci 26690 1 rtl8723be
rtlwifi 63475 2 rtl_pci,rtl8723be
mac80211 630653 3 rtl_pci,rtlwifi,rtl8723be
cfg80211 484040 3 iwlwifi,mac80211,rtlwifi
wmi 19177 0
module parameters ~~~~~~~~~~~~~~~~~~
cfg80211 (2): cfg80211_disable_40mhz_24ghz=N | ieee80211_regdom=00
iwlwifi (11): 11n_disable=1 | amsdu_size_8K=0 | antenna_coupling=0 | bt_coex_active=Y | fw_restart=Y | led_mode=0 | nvm_file=(null) | power_level=0 | power_save=N | swcrypto=0 | wd_disable=1
mac80211 (5): beacon_loss_count=7 | ieee80211_default_rc_algo=minstrel_ht | max_nullfunc_tries=2 | max_probe_tries=5 | probe_wait_ms=500
rtl8723be (6): debug=0 | fwlps=Y | ips=Y | msi=N | swenc=N | swlps=N
wmi (2): debug_dump_wdg=N | debug_event=N
nm-tool ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
State: disconnected
================o=============o===========o==============o=========o===========o==============o===========
Interface & ID | Type | Driver | State | Default | Speed | Support | HW Addr
================o=============o===========o==============o=========o===========o==============o===========
wlan0 | 802.11 WiFi | rtl8723be | disconnected | no | | WEP/WPA/WPA2 | <MAC wlan0>
supermolecule: Infra, <MAC C-NA supermolecule 1>, Freq 2447 MHz, Rate 54 Mb/s, Strength 60 WPA2
001D73B28EFB: Infra, <MAC C-NA 001D73B28EFB 1>, Freq 2422 MHz, Rate 54 Mb/s, Strength 77 WPA WPA2
----------------+-------------+-----------+--------------+---------+-----------+--------------+-----------
eth0 | Wired | r8169 | unavailable | no | | | <MAC eth0>
----------------+-------------+-----------+--------------+---------+-----------+--------------+-----------
NetworkManager.state ~~~~~~~~~~~~~~~
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
WimaxEnabled=true
NetworkManager.conf ~~~~~~~~~~~~~~~~
[main]
plugins=ifupdown,keyfile,ofono
dns=dnsmasq
[ifupdown]
managed=false
NM WiFi Profiles ~~~~~~~~~~~~~~~~~~~
106F3FF45FE8 : ssid=106F3FF45FE8 | mac-address=<MAC wlan0> | ipv4=auto | ipv6=auto
15403 : ssid=15403 | mac-address=<MAC wlan0> | ipv4=auto | ipv6=auto
utroam : ssid=utroam | mac-address=<MAC wlan0> | ipv4=auto | ipv6=auto
utroam-1x : ssid=utroam-1x | mac-address=<MAC wlan0> | ipv4=auto
interfaces ~~~~~~~~~~~~~~~~~~~~~~~~~
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
resolv.conf ~~~~~~~~~~~~~~~~~~~~~~~~
Routes & Ping ~~~~~~~~~~~~~~~~~~~~~~
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
iw reg get ~~~~~~~~~~~~~~~~~~~~~~~~~
(Region : ja_JP.UTF-8)
country 00:
(2402 - 2472 @ 40), (3, 20)
(2457 - 2482 @ 40), (3, 20), PASSIVE-SCAN, NO-IBSS
(2474 - 2494 @ 20), (3, 20), NO-OFDM, PASSIVE-SCAN, NO-IBSS
(5170 - 5250 @ 40), (3, 20), PASSIVE-SCAN, NO-IBSS
(5735 - 5835 @ 40), (3, 20), PASSIVE-SCAN, NO-IBSS
iwlist chan ~~~~~~~~~~~~~~~~~~~~~~~~
wlan0 13 channels in total; available frequencies :
Channel 01 (2.412 GHz) - 13 (2.472 GHz)
iwlist scan ~~~~~~~~~~~~~~~~~~~~~~~~
wlan0 No scan results
blacklist ~~~~~~~~~~~~~~~~~~~~~~~~~~
[/etc/modprobe.d/blacklist-ath_pci.conf]
blacklist ath_pci
modinfo ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[iwlwifi]
filename: /lib/modules/3.13.0-37-generic/kernel/drivers/net/wireless/iwlwifi/iwlwifi.ko
version: in-tree:
firmware: iwlwifi-100-5.ucode
firmware: iwlwifi-1000-5.ucode
firmware: iwlwifi-135-6.ucode
firmware: iwlwifi-105-6.ucode
firmware: iwlwifi-2030-6.ucode
firmware: iwlwifi-2000-6.ucode
firmware: iwlwifi-5150-2.ucode
firmware: iwlwifi-5000-5.ucode
firmware: iwlwifi-6000g2b-6.ucode
firmware: iwlwifi-6000g2a-5.ucode
firmware: iwlwifi-6050-5.ucode
firmware: iwlwifi-6000-4.ucode
firmware: iwlwifi-7265-7.ucode
firmware: iwlwifi-3160-7.ucode
firmware: iwlwifi-7260-7.ucode
srcversion: C2D0F3DFCA289585C100E36
depends: cfg80211
parm: swcrypto:using crypto in software (default 0 [hardware]) (int)
parm: 11n_disable:disable 11n functionality, bitmap: 1: full, 2: disable agg TX, 4: disable agg RX, 8 enable agg TX (uint)
parm: amsdu_size_8K:enable 8K amsdu size (default 0) (int)
parm: fw_restart:restart firmware in case of error (default true) (bool)
parm: antenna_coupling:specify antenna coupling in dB (defualt: 0 dB) (int)
parm: wd_disable:Disable stuck queue watchdog timer 0=system default, 1=disable, 2=enable (default: 0) (int)
parm: nvm_file:NVM file name (charp)
parm: bt_coex_active:enable wifi/bt co-exist (default: enable) (bool)
parm: led_mode:0=system default, 1=On(RF On)/Off(RF Off), 2=blinking, 3=Off (default: 0) (int)
parm: power_save:enable WiFi power management (default: disable) (bool)
parm: power_level:default power save level (range from 1 - 5, default: 1) (int)
[rtl8723be]
filename: /lib/modules/3.13.0-37-generic/kernel/drivers/net/wireless/rtlwifi/rtl8723be/rtl8723be.ko
firmware: rtlwifi/rtl8723befw.bin
srcversion: 0D59E0301AAA6E5A93400BB
depends: rtlwifi,rtl8723-common,rtl_pci,btcoexist,mac80211
parm: swlps:bool
parm: swenc:using hardware crypto (default 0 [hardware])
parm: ips:using no link power save (default 1 is open)
parm: fwlps:using linked fw control power save (default 1 is open)
parm: msi:Set to 1 to use MSI interrupts mode (default 0)
parm: debug:Set debug level (0-5) (default 0) (int)
[btcoexist]
filename: /lib/modules/3.13.0-37-generic/kernel/drivers/net/wireless/rtlwifi/btcoexist/btcoexist.ko
srcversion: 3CC61E00E2CEF446293F879
depends:
[rtl8723_common]
filename: /lib/modules/3.13.0-37-generic/kernel/drivers/net/wireless/rtlwifi/rtl8723com/rtl8723-common.ko
srcversion: D1807280DBDC9B8A7EBDAB7
depends:
[rtl_pci]
filename: /lib/modules/3.13.0-37-generic/kernel/drivers/net/wireless/rtlwifi/rtl_pci.ko
srcversion: D5E4890DC428FA5A1BF92DF
depends: mac80211,rtlwifi
[rtlwifi]
filename: /lib/modules/3.13.0-37-generic/kernel/drivers/net/wireless/rtlwifi/rtlwifi.ko
srcversion: E1F4663325225EE8DBA54CA
depends: mac80211,cfg80211
[mac80211]
filename: /lib/modules/3.13.0-37-generic/kernel/net/mac80211/mac80211.ko
srcversion: B822641624778B987844F6F
depends: cfg80211
parm: max_nullfunc_tries:Maximum nullfunc tx tries before disconnecting (reason 4). (int)
parm: max_probe_tries:Maximum probe tries before disconnecting (reason 4). (int)
parm: beacon_loss_count:Number of beacon intervals before we decide beacon was lost. (int)
parm: probe_wait_ms:Maximum time(ms) to wait for probe response before disconnecting (reason 4). (int)
parm: ieee80211_default_rc_algo:Default rate control algorithm for mac80211 to use (charp)
[cfg80211]
filename: /lib/modules/3.13.0-37-generic/kernel/net/wireless/cfg80211.ko
srcversion: C2478077E22138832B71659
depends:
parm: ieee80211_regdom:IEEE 802.11 regulatory domain code (charp)
parm: cfg80211_disable_40mhz_24ghz:Disable 40MHz support in the 2.4GHz band (bool)
[wmi]
filename: /lib/modules/3.13.0-37-generic/kernel/drivers/platform/x86/wmi.ko
srcversion: CED5410F008DC70DF5F064B
depends:
parm: debug_event:Log WMI Events [0/1] (bool)
parm: debug_dump_wdg:Dump available WMI interfaces [0/1] (bool)
udev rules ~~~~~~~~~~~~~~~~~~~~~~~~~
# PCI device 0x10ec:0x8168 (r8169)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<MAC eth0>", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
# PCI device 0x10ec:0xb723 (rtl8723be)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<MAC wlan0>", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan0"
Custom files/entries ~~~~~~~~~~~~~~~
/etc/modules : Default
/etc/rc.local : Not Default
/etc/modprobe.d : Not Default
/etc/pm/(cnf|pw|sl) : Not Default
[/etc/rc.local]
echo 1100 > /sys/class/backlight/intel_backlight/brightness
exit 0
[/etc/modprobe.d]
iwlwifi.conf : remove iwlwifi \
(/sbin/lsmod | grep -o -e ^iwlmvm -e ^iwldvm -e ^iwlwifi | xargs /sbin/rmmod) \
&& /sbin/modprobe -r mac80211
options iwlwifi 11n_disable=1
iwlwifi.conf~ : remove iwlwifi \
(/sbin/lsmod | grep -o -e ^iwlmvm -e ^iwldvm -e ^iwlwifi | xargs /sbin/rmmod) \
&& /sbin/modprobe -r mac80211
mlx4.conf : softdep mlx4_core post: mlx4_en
[/etc/pm/power.d/wireless]
#!/bin/sh
/sbin/iwconfig wlan0 power off
Kernel boot line ~~~~~~~~~~~~~~~~~~~
BOOT_IMAGE=/boot/vmlinuz-3.13.0-37-generic.efi.signed root=UUID=ee1f131b-08b0-429f-8912-7a3f287c793b ro quiet splash vt.handoff=7
dmesg ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[ 0.621462] microcode: Microcode Update Driver: v2.00 <tigran@aivazian.fsnet.co.uk>, Peter Oruba
[ 0.621709] audit: initializing netlink socket (disabled)
[ 0.790834] r8169 Gigabit Ethernet driver 2.3LK-NAPI loaded
[ 1.357364] psmouse serio1: elantech: assuming hardware version 4 (with firmware version 0x461f16)
[ 2.766506] wmi: Mapper loaded
[ 2.826782] rtl8723be: Using firmware rtlwifi/rtl8723befw.bin
[ 2.839363] ieee80211 phy0: Selected rate control algorithm 'rtl_rc'
[ 2.839551] rtlwifi: wireless switch is on
[ 4.546965] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 5.190130] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[ 5.190320] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[ 90.622664] wlan0: authenticate with <MAC ID removed>
[ 90.641893] wlan0: send auth to <MAC ID removed> (try 1/3)
[ 90.643488] wlan0: authenticated
[ 90.645396] wlan0: associate with <MAC ID removed> (try 1/3)
[ 90.648479] wlan0: RX AssocResp from <MAC ID removed> (capab=0x631 status=1 aid=2)
[ 90.648488] wlan0: <MAC ID removed> denied association (code=1)
[ 90.667814] wlan0: deauthenticating from <MAC ID removed> by local choice (reason=3)
[ 90.794241] wlan0: authenticate with <MAC ID removed>
[ 90.804439] wlan0: send auth to <MAC ID removed> (try 1/3)
[ 90.820868] wlan0: authenticated
[ 90.821302] wlan0: associate with <MAC ID removed> (try 1/3)
[ 90.826483] wlan0: RX AssocResp from <MAC ID removed> (capab=0x431 status=0 aid=1)
[ 90.826668] wlan0: associated
[ 90.826688] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[ 90.830500] wlan0: deauthenticated from <MAC ID removed> (Reason: 3)
[ 92.261378] wlan0: authenticate with <MAC ID removed>
[ 92.280916] wlan0: send auth to <MAC ID removed> (try 1/3)
[ 92.282342] wlan0: authenticated
[ 92.284475] wlan0: associate with <MAC ID removed> (try 1/3)
[ 92.287446] wlan0: RX AssocResp from <MAC ID removed> (capab=0x431 status=0 aid=1)
[ 92.287733] wlan0: associated
[ 106.832962] wlan0: authenticate with <MAC ID removed>
[ 106.843208] wlan0: send auth to <MAC ID removed> (try 1/3)
[ 106.848511] wlan0: authenticated
[ 106.852023] wlan0: associate with <MAC ID removed> (try 1/3)
[ 106.859249] wlan0: RX AssocResp from <MAC ID removed> (capab=0x431 status=0 aid=2)
[ 106.859404] wlan0: associated
[ 548.150121] wlan0: authenticate with <MAC ID removed>
[ 548.160402] wlan0: send auth to <MAC ID removed> (try 1/3)
[ 548.178327] wlan0: authenticated
[ 548.181277] wlan0: associate with <MAC ID removed> (try 1/3)
[ 548.189450] wlan0: RX AssocResp from <MAC ID removed> (capab=0x431 status=0 aid=1)
[ 548.189625] wlan0: associated
[ 558.311342] wlan0: authenticate with <MAC ID removed>
[ 558.321619] wlan0: send auth to <MAC ID removed> (try 1/3)
[ 558.323667] wlan0: authenticated
[ 558.326548] wlan0: associate with <MAC ID removed> (try 1/3)
[ 558.329850] wlan0: RX AssocResp from <MAC ID removed> (capab=0x431 status=0 aid=2)
[ 558.330015] wlan0: associated
[ 1091.372951] wlan0: deauthenticating from <MAC ID removed> by local choice (reason=3)
[ 1094.309771] rtlwifi: wireless switch is on
[ 1097.560361] rtl8723be 0000:09:00.0: no hotplug settings from platform
[ 1098.357498] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[ 1100.059861] wlan0: authenticate with <MAC ID removed>
[ 1100.079734] wlan0: send auth to <MAC ID removed> (try 1/3)
[ 1100.082123] wlan0: authenticated
[ 1100.083299] wlan0: associate with <MAC ID removed> (try 1/3)
[ 1100.086300] wlan0: RX AssocResp from <MAC ID removed> (capab=0x431 status=0 aid=4)
[ 1100.086474] wlan0: associated
[ 1100.086510] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[ 1100.251871] wlan0: deauthenticating from <MAC ID removed> by local choice (reason=2)
[ 1100.285453] wlan0: authenticate with <MAC ID removed>
[ 1100.295648] wlan0: send auth to <MAC ID removed> (try 1/3)
[ 1100.298036] wlan0: authenticated
[ 1100.299060] wlan0: associate with <MAC ID removed> (try 1/3)
[ 1100.302358] wlan0: RX AssocResp from <MAC ID removed> (capab=0x431 status=0 aid=4)
[ 1100.302519] wlan0: associated
[ 1126.163709] wlan0: authenticate with <MAC ID removed>
[ 1126.173858] wlan0: send auth to <MAC ID removed> (try 1/3)
[ 1126.175735] wlan0: authenticated
[ 1126.179692] wlan0: associate with <MAC ID removed> (try 1/3)
[ 1126.195366] wlan0: RX AssocResp from <MAC ID removed> (capab=0x431 status=0 aid=2)
[ 1126.195526] wlan0: associated
[ 1204.358127] wlan0: authenticate with <MAC ID removed>
[ 1204.368261] wlan0: send auth to <MAC ID removed> (try 1/3)
[ 1204.370628] wlan0: authenticated
[ 1204.373013] wlan0: associate with <MAC ID removed> (try 1/3)
[ 1204.376126] wlan0: RX AssocResp from <MAC ID removed> (capab=0x431 status=0 aid=4)
[ 1204.376283] wlan0: associated
[ 1314.956600] wlan0: authenticate with <MAC ID removed>
[ 1314.966758] wlan0: direct probe to <MAC ID removed> (try 1/3)
[ 1315.167841] wlan0: direct probe to <MAC ID removed> (try 2/3)
[ 1315.371627] wlan0: direct probe to <MAC ID removed> (try 3/3)
[ 1315.575434] wlan0: authentication with <MAC ID removed> timed out
[ 1316.655061] wlan0: authenticate with <MAC ID removed>
[ 1316.665245] wlan0: send auth to <MAC ID removed> (try 1/3)
[ 1316.766173] wlan0: send auth to <MAC ID removed> (try 2/3)
[ 1316.870062] wlan0: send auth to <MAC ID removed> (try 3/3)
[ 1316.973936] wlan0: authentication with <MAC ID removed> timed out
[ 1331.864836] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
======== Done ========
Agradeço antecipadamente.
Aliás, estou estudando o Ubuntu porque achei mais divertido do que tentar lidar com o Windows. Eu poderia decidir mudar minha plataforma principal para o Ubuntu por causa da comunidade Ask Ubuntu. Obrigado a todos os geeks do Ubuntu.
Percebi isso quando uso o WPA para conectar-se ao roteador. Tente usar o WPA2 - ele funciona bem para mim agora.
—
captagio 28/12/16