互联网连接相对稳定，但每隔几分钟似乎就会断线 10-20 秒。
Panda Ultra Wireless N 连接不稳定
http://www.amazon.com/Panda-Ultra-Wireless-Adapter-150Mbps/product-reviews/B00762YNMG
======== Wireless-Info START ========
System-Info ~~~~~~~~~~~~~~~~~~~~~~~~
tsohG 3.13.0-34-generic x86_64, Ubuntu 14.04.1 LTS, trusty
CPU : Intel(R) Core(TM) i7-3770K CPU @ 3.50GHz
Memory : 15995 MB
Uptime : 08:46:02 up 24 min, 2 users, load average: 0.76, 0.85, 0.74
lspci ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
03:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 06)
Subsystem: Gigabyte Technology Co., Ltd Motherboard [1458:e000]
Kernel driver in use: r8169
lsusb ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 006: ID 093a:2510 Pixart Imaging, Inc. Optical Mouse
Bus 001 Device 005: ID 148f:5370 Ralink Technology, Corp. RT5370 Wireless Adapter
Bus 001 Device 004: ID 0b38:0010 Gear Head 107-Key Keyboard
Bus 001 Device 003: ID 047f:c010 Plantronics, Inc.
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
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 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
PCMCIA Card Info ~~~~~~~~~~~~~~~~~~~
iwconfig ~~~~~~~~~~~~~~~~~~~~~~~~~~~
wlan0 IEEE 802.11bgn ESSID:"Nehtgaer"
Mode:Managed Frequency:2.412 GHz Access Point: <MAC C-01 Nehtgaer>
Bit Rate=19.5 Mb/s Tx-Power=20 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Encryption key:off
Power Management:on
Link Quality=39/70 Signal level=-71 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:202 Invalid misc:421 Missed beacon:0
rfkill ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Interface Soft blocked Hard blocked
0: phy0: Wireless LAN no no
lsmod ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
rt2800usb 27034 0
rt2x00usb 20742 1 rt2800usb
rt2800lib 89076 1 rt2800usb
rt2x00lib 55307 3 rt2x00usb,rt2800lib,rt2800usb
mac80211 630653 3 rt2x00lib,rt2x00usb,rt2800lib
cfg80211 484040 2 mac80211,rt2x00lib
crc_ccitt 12707 1 rt2800lib
module parameters ~~~~~~~~~~~~~~~~~~
cfg80211 (2): cfg80211_disable_40mhz_24ghz=N | ieee80211_regdom=00
mac80211 (5): beacon_loss_count=7 | ieee80211_default_rc_algo=minstrel_ht | max_nullfunc_tries=2 | max_probe_tries=5 | probe_wait_ms=500
rt2800usb (1): nohwcrypt=N
nm-tool ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
State: unknown
================o======o========o========o=========o===========o==============o===========
Interface & ID | Type | Driver | State | Default | Speed | Support | HW Addr
================o======o========o========o=========o===========o==============o===========
| | | | | | |
----------------+------+--------+--------+---------+-----------+--------------+-----------
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 ~~~~~~~~~~~~~~~~~~~
Nehtgaer : ssid=Nehtgaer | mac-address=<MAC wlan0> | ipv6=ignore | ipv4=auto
interfaces ~~~~~~~~~~~~~~~~~~~~~~~~~
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
resolv.conf ~~~~~~~~~~~~~~~~~~~~~~~~
nameserver 192.168.1.1
Routes & Ping ~~~~~~~~~~~~~~~~~~~~~~
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 wlan0
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 wlan0
--- 192.168.1.1 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 999ms
rtt min/avg/max/mdev = 0.702/1.402/2.103/0.701 ms
--- 192.168.1.1 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 999ms
rtt min/avg/max/mdev = 0.760/0.820/0.881/0.066 ms
iw reg get ~~~~~~~~~~~~~~~~~~~~~~~~~
(Region : "en_US.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 14 channels in total; available frequencies :
Channel 01 (2.412 GHz) - 14 (2.484 GHz)
Current Frequency:2.412 GHz (Channel 1)
iwlist scan ~~~~~~~~~~~~~~~~~~~~~~~~
wlan0 Scan completed :
Cell 01 - Address: <MAC C-01 Nehtgaer>
Channel:1
Frequency:2.412 GHz (Channel 1)
Quality=39/70 Signal level=-71 dBm
Encryption key:off
ESSID:"Nehtgaer"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
9 Mb/s; 12 Mb/s; 18 Mb/s
Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
Mode:Master
Extra:tsf=0000001ea5926265
Extra: Last beacon: 44ms ago
blacklist ~~~~~~~~~~~~~~~~~~~~~~~~~~
[/etc/modprobe.d/blacklist-ath_pci.conf]
blacklist ath_pci
modinfo ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[rt2800usb]
filename: /lib/modules/3.13.0-34-generic/kernel/drivers/net/wireless/rt2x00/rt2800usb.ko
firmware: rt2870.bin
version: 2.3.0
srcversion: D6F814DAF78F2BEA3DA12CB
depends: rt2x00lib,rt2800lib,rt2x00usb
parm: nohwcrypt:Disable hardware encryption. (bool)
[rt2x00usb]
filename: /lib/modules/3.13.0-34-generic/kernel/drivers/net/wireless/rt2x00/rt2x00usb.ko
version: 2.3.0
srcversion: 44768071492503F8EFE1EED
depends: rt2x00lib,mac80211
[rt2800lib]
filename: /lib/modules/3.13.0-34-generic/kernel/drivers/net/wireless/rt2x00/rt2800lib.ko
version: 2.3.0
srcversion: 9BD0087B6943A41E7FD8EDA
depends: rt2x00lib,mac80211,crc-ccitt
[rt2x00lib]
filename: /lib/modules/3.13.0-34-generic/kernel/drivers/net/wireless/rt2x00/rt2x00lib.ko
version: 2.3.0
srcversion: CC69EE39E7D673974A21C0A
depends: mac80211,cfg80211
[mac80211]
filename: /lib/modules/3.13.0-34-generic/kernel/net/mac80211/mac80211.ko
srcversion: 8ADA881D348148A3358334C
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/3.13.0-34-generic/kernel/net/wireless/cfg80211.ko
srcversion: E786D076B61F97809B04B64
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)
[crc_ccitt]
filename: /lib/modules/3.13.0-34-generic/kernel/lib/crc-ccitt.ko
srcversion: 2294FCAD06D727386004EEB
depends:
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"
# USB device 0x:0x (rt2800usb)
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 : Default
/etc/modprobe.d : Not Default
/etc/pm/(cnf|pw|sl) : Default
[/etc/modprobe.d]
iwlwifi.conf : options iwlwifi 11n_disable=1
mlx4.conf : softdep mlx4_core post: mlx4_en
Kernel boot line ~~~~~~~~~~~~~~~~~~~
BOOT_IMAGE=/boot/vmlinuz-3.13.0-34-generic root=UUID=758c9891-4c05-4596-9083-f799581dc1d8 ro quiet splash vt.handoff=7
dmesg ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[ 0.433570] microcode: Microcode Update Driver: v2.00 <[email protected]>, Peter Oruba
[ 0.433771] audit: initializing netlink socket (disabled)
[ 0.694234] r8169 Gigabit Ethernet driver 2.3LK-NAPI loaded
[ 10.255221] ieee80211 phy0: rt2x00_set_rt: Info - RT chipset 5390, rev 0502 detected
[ 10.283322] ieee80211 phy0: rt2x00_set_rf: Info - RF chipset 5370 detected
[ 15.248447] init: network-manager main process (852) terminated with status 127
[ 15.248457] init: network-manager main process ended, respawning
[ 16.236485] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 24.173407] ieee80211 phy0: rt2x00lib_request_firmware: Info - Loading firmware file 'rt2870.bin'
[ 24.205183] ieee80211 phy0: rt2x00lib_request_firmware: Info - Firmware detected - version: 0.29
[ 24.438982] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[ 35.087206] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[ 36.177441] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[ 38.186311] wlan0: authenticate with <MAC C-01 Nehtgaer>
[ 38.208811] wlan0: send auth to <MAC C-01 Nehtgaer> (try 1/3)
[ 38.210285] wlan0: authenticated
[ 38.210322] wlan0: deauthenticating from <MAC C-01 Nehtgaer> by local choice (reason=3)
[ 38.214082] wlan0: associate with <MAC C-01 Nehtgaer> (try 1/3)
[ 38.217397] wlan0: RX AssocResp from <MAC C-01 Nehtgaer> (capab=0x421 status=0 aid=1)
[ 38.224128] wlan0: associated
[ 38.224152] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
======== Done ========
答案1
做：
gksudo gedit /etc/pm/power.d/wireless
您可能需要安装 su：
(this will create or edit a configuration file that will override the default power management behavior) and enter the following:
#!/bin/sh
/sbin/iwconfig wlan0 power off
以上 exit0，然后保存 gedit，关闭
做：
echo "options rt2800usb nohwcrypt=y" | sudo tee /etc/modprobe.d/rt2800usb.conf
sudo modprobe -rfv rt2800usb
sudo modprobe -v rt2800usb
重启
在您的路由器中，将加密更改为 WPA2-AES（这是首选）；而不是任何 WPA 和 WPA2 混合模式，当然也不是 TKIP。其次，如果您的路由器能够达到 N 速度，那么在 2.4 GHz 频段中使用 20 MHz 的信道宽度（而不是自动 20/40 MHz）可能会更幸运。使用固定信道（1、6 或 11）也会比自动信道选择更幸运。进行这些更改后，重新启动路由器。
接下来，我在网络管理器中将 IPv6 设置为忽略：IPV6
运行以下命令检查电源管理是否已关闭：
iwconfig