☰

与 Broadcom BCM4321 断开无线连接并重新连接

tag-icon • tag-icon wireless 12.04 broadcom
与 Broadcom BCM4321 断开无线连接并重新连接

从昨天开始，使用最新的发行版后，我网络上通过无线连接的两台 Ubuntu 计算机每小时都会随机断线数次。连接会在几秒钟内重新建立，但会中断下载、浏览和更新。通过以太网连接的 Windows 计算机不受这些中断的影响。在之前几周我安装 12.04 Beta 版时没有发生这种情况；只是从昨天开始使用新发行版时才发生这种情况。事实上，在我输入这些内容时，连接断线了两次。

sudo lshw -class network返回：

 *-network               
   description: Wireless interface
   product: BCM4321 802.11a/b/g/n
   vendor: Broadcom Corporation
   physical id: 0
   bus info: pci@0000:0c:00.0
   logical name: eth3
   version: 01
   serial: 00:16:cf:c9:36:50
   width: 64 bits
   clock: 33MHz
   capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
   configuration: broadcast=yes driver=wl0 driverversion=5.100.82.38 ip=192.168.0.2 latency=0 multicast=yes wireless=IEEE 802.11abgn
   resources: irq:17 memory:efdfc000-efdfffff memory:e0000000-e00fffff
 *-network
   description: Ethernet interface
   product: BCM4401-B0 100Base-TX
   vendor: Broadcom Corporation
   physical id: 0
   bus info: pci@0000:03:00.0
   logical name: eth2
   version: 02
   serial: 00:18:8b:ab:dc:fd
   size: 10Mbit/s
   capacity: 100Mbit/s
   width: 32 bits
   clock: 33MHz
   capabilities: pm bus_master cap_list ethernet physical mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
   configuration: autonegotiation=on broadcast=yes driver=b44 driverversion=2.0 duplex=half latency=64 link=no multicast=yes port=twisted pair speed=10Mbit/s
   resources: irq:17 memory:ef9fe000-ef9fffff

lsusb返回：

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 002: ID 413c:a005 Dell Computer Corp. Internal 2.0 Hub
Bus 001 Device 003: ID 0a5c:4500 Broadcom Corp. BCM2046B1 USB 2.0 Hub (part of BCM2046 Bluetooth)
Bus 001 Device 004: ID 413c:8126 Dell Computer Corp. Wireless 355 Bluetooth
Bus 001 Device 005: ID 0a5c:4502 Broadcom Corp. Keyboard (Boot Interface Subclass)
Bus 001 Device 006: ID 0a5c:4503 Broadcom Corp. Mouse (Boot Interface Subclass)

lspci返回：

00:00.0 Host bridge: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 945GT Express Memory Controller Hub (rev 03)
00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller (rev 03)
00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller (rev 03)
00:1b.0 Audio device: Intel Corporation N10/ICH 7 Family High Definition Audio Controller (rev 01)
00:1c.0 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 1 (rev 01)
00:1c.1 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 2 (rev 01)
00:1c.3 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 4 (rev 01)
00:1d.0 USB controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #1 (rev 01)
00:1d.1 USB controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #2 (rev 01)
00:1d.2 USB controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #3 (rev 01)
00:1d.3 USB controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #4 (rev 01)
00:1d.7 USB controller: Intel Corporation N10/ICH 7 Family USB2 EHCI Controller (rev 01)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e1)
00:1f.0 ISA bridge: Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge (rev 01)
00:1f.2 IDE interface: Intel Corporation 82801GBM/GHM (ICH7-M Family) SATA Controller [IDE mode] (rev 01)
00:1f.3 SMBus: Intel Corporation N10/ICH 7 Family SMBus Controller (rev 01)
03:00.0 Ethernet controller: Broadcom Corporation BCM4401-B0 100Base-TX (rev 02)
03:01.0 FireWire (IEEE 1394): Ricoh Co Ltd R5C832 IEEE 1394 Controller
03:01.1 SD Host controller: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter (rev 19)
03:01.2 System peripheral: Ricoh Co Ltd R5C592 Memory Stick Bus Host Adapter (rev 0a)
03:01.3 System peripheral: Ricoh Co Ltd xD-Picture Card Controller (rev 05)
0c:00.0 Network controller: Broadcom Corporation BCM4321 802.11a/b/g/n (rev 01)

rfkill list all返回：

0: brcmwl-0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
1: dell-wifi: Wireless LAN
    Soft blocked: no
    Hard blocked: no
2: dell-bluetooth: Bluetooth
    Soft blocked: no
    Hard blocked: no
3: hci0: Bluetooth
    Soft blocked: no
    Hard blocked: no

我承认，我不知道该怎么做。我只知道，直到昨天，我的连接一直很稳定，但随着更新，它不断断线并重新连接。

答案1

我也遇到过同样的问题，wifi 保持连接，但几分钟后 DNS 或路由均未发生。我必须重新启动才能恢复。

我所做的就是禁用 IPV6，到目前为止，已经连接了 3 个小时，没有掉线。不知道如何证明这是解决方案，还是我在过去 3 个小时里只是运气好而已。

答案2

您的 wifi 驱动程序很可能没有正确安装。点击窗口（meta）按钮并additional drivers在仪表板上搜索。启动它并安装任何额外的驱动程序（如果它指示这样做）。
如果失败，那么你将不得不检查安装了哪个 wifi 驱动程序。对于该类型ctrl+alt+t和类型lspci。您将看到驱动程序列表。使用代码查找Network Controller并重新安装驱动程序synaptic package manager。例如 bcm43225

答案3

尝试禁用 WiFi NIC 的电源管理：

以 eth1 为例：iwconfig eth1 power off

相关内容