我遇到了一个问题，这个问题似乎在这里和 Ubuntu 论坛上都很常见。遗憾的是，我找不到与我的特定笔记本电脑型号相对应的任何解决方案。
问题很简单：无线连接会随机断开。发生这种情况时，根据网络管理员的说法，网络连接仍然处于活动状态。但很明显，连接已断开；互联网访问不再有效。当我断开连接并重新连接时，它会工作一小会儿，然后再次断开。
我尝试了一些常识性的解决方案：检查附加驱动程序（没有找到），检查以确保路由器没有问题，等等。我还尝试从存储库安装 linux-backports-modules-cw-*（论坛上流传的常见解决方案）。这激活了我的以太网端口（我遇到的另一个问题），但对无线连接断开没有任何影响。
我使用的操作系统是Ubuntu 12.10 64位，笔记本电脑是东芝Satellite C855-S5343。
$ sudo lshw -C network
*-network
description: Ethernet interface
product: AR8162 Fast Ethernet
vendor: Atheros Communications Inc.
physical id: 0
bus info: pci@0000:01:00.0
logical name: eth0
version: 10
serial: 00:8c:fa:26:2d:bd
capacity: 100Mbit/s
width: 64 bits
clock: 33MHz
capabilities: pm pciexpress msi msix bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=alx firmware=alx latency=0 link=no multicast=yes port=twisted pair
resources: irq:43 memory:c8500000-c853ffff ioport:3000(size=128)
*-network
description: Wireless interface
product: RTL8188CE 802.11b/g/n WiFi Adapter
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:02:00.0
logical name: wlan0
version: 01
serial: 20:16:d8:1d:97:2a
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=rtl8192ce driverversion=3.5.0-21-generic firmware=N/A ip=192.168.1.4 latency=0 link=yes multicast=yes wireless=IEEE 802.11bgn
resources: irq:17 ioport:2000(size=256) memory:c8400000-c8403fff
$ dmesg
[ 17.101237] wlan0: authenticate with 00:1f:33:dc:55:e5
[ 17.120299] wlan0: send auth to 00:1f:33:dc:55:e5 (try 1/3)
[ 17.127313] wlan0: authenticated
[ 17.127463] rtl8192ce 0000:02:00.0: wlan0: disabling HT due to WEP/TKIP use
[ 17.142316] wlan0: associate with 00:1f:33:dc:55:e5 (try 1/3)
[ 17.144423] wlan0: RX AssocResp from 00:1f:33:dc:55:e5 (capab=0x411 status=0 aid=5)
[ 17.144541] wlan0: associated
[ 17.146380] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready