无线网卡信号低

[rappo]

不知道问题出在哪里，上网又可以上的，就是信号只有一格，但WINDOWS下信号不存在这个问题？

[vickycq]

在已连接无线网的情况下 执行以下指令将结果全部复制贴上来

代码： 全选

uname -a
lspci -knn | grep -iA2 net
sudo lshw -C net
sudo iwconfig

[poloshiao]

通常表示你還沒安裝/設定/啟用合適驅動(driver)或固體(firmware)

[rappo]

long@long-desktop:~$ uname -a
Linux long-desktop 4.4.0-22-generic #40-Ubuntu SMP Thu May 12 22:03:46 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
long@long-desktop:~$ lspci -knn | grep -iA2 net
03:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 07)
Subsystem: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:0123]
Kernel driver in use: r8169
Kernel modules: r8169
long@long-desktop:~$ sudo lshw -C net
[sudo] long 的密码：
*-network
description: Ethernet interface
product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:03:00.0
logical name: enp3s0
version: 07
serial: 00:e0:4c:00:08:ab
size: 10Mbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl8168e-3_0.0.4 03/27/12 latency=0 link=no multicast=yes port=MII speed=10Mbit/s
resources: irq:33 ioport:e000(size=256) memory:fea00000-fea00fff memory:d0000000-d0003fff
*-network
description: Wireless interface
physical id: 1
bus info: usb@2:1
logical name: wlx006b9e0aa158
serial: 00:6b:9e:0a:a1:58
capabilities: ethernet physical wireless
configuration: broadcast=yes driver=rt2800usb driverversion=4.4.0-22-generic firmware=0.29 ip=192.168.0.192 link=yes multicast=yes wireless=IEEE 802.11bgn

[vickycq]

在已连接无线网的情况下 执行以下指令将结果全部复制贴上来

代码： 全选

lsusb
sudo iwconfig

[rappo]

long@long-desktop:~$ lsusb
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 002: ID 148f:5370 Ralink Technology, Corp. RT5370 Wireless Adapter
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 002: ID 1e4e:0110 Cubeternet
Bus 001 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 009 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 008 Device 002: ID 093a:2510 Pixart Imaging, Inc. Optical Mouse
Bus 008 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 007 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 006 Device 002: ID 04d9:1605 Holtek Semiconductor, Inc.
Bus 006 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
long@long-desktop:~$ sudo iwconfig
[sudo] long 的密码：
enp3s0 no wireless extensions.

wlx006b9e0aa158 IEEE 802.11bgn ESSID:"wgkj"
Mode:Managed Frequency:2.462 GHz Access Point: C8:3A:35:09:B2:99
Bit Rate=21.7 Mb/s Tx-Power=20 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Encryption key:off
Power Management:off
Link Quality=19/70 Signal level=-91 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:429 Invalid misc:153 Missed beacon:0

lo no wireless extensions.

[vickycq]

上网又可以上的，就是信号只有一格
Bus 002 Device 002: ID 148f:5370 Ralink Technology, Corp. RT5370 Wireless Adapter
driver=rt2800usb driverversion=4.4.0-22-generic firmware=0.29
Link Quality=19/70 Signal level=-91 dBm

手头有 3 个 rt5370，在 4.5 内核 + 0.29 固件上试了试，未遇到此问题

如果连接质量可以接受 建议先观察看看

若要折腾，几个可能的方向：
1 - 更换内核 如 Linux 4.2/4.5/4.6
2 - 更换固件 如 0.32 / 0.33
3 - 设法编译雷凌官方驱动(可能需要修改才能在 Linux 4.x 上编译通过)