我的笔记本电脑上最初安装的是 Ubuntu 12.04。我升级到 12.10，然后升级到 13.04。一切都运行良好，包括无线。添加新内存卡后（我只有 2 GB 和一个内存插槽可用），我的无线停止工作。我备份了所有数据并重新安装了 Ubuntu 13.04。除了无线之外，一切都运行良好。我于 2010 年从日本购买了这台笔记本电脑。它有 Intel Core i5 CPU M 450 @2.40 Ghz * 4 3,7 Gb RAM 操作系统类型 64 位 iwconfig 的输出：eth0 没有无线扩展。
lo no wireless extensions.
wlan0 IEEE 802.11bgn ESSID:off/any
Mode:Managed Access Point: Not-Associated Tx-Power=15 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:off
rfkill 的输出列出所有：
0: ideapad_wlan: Wireless LAN
Soft blocked: no
Hard blocked: no
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
lshw -C 网络的输出：
*-network description: Wireless interface
product: AR9285 Wireless Network Adapter (PCI-Express)
vendor: Atheros Communications Inc.
physical id: 0
bus info: pci@0000:05:00.0
logical name: wlan0
version: 01
serial: 78:e4:00:7d:fe:fa
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=ath9k driverversion=3.8.0-19-generic firmware=N/A latency=0 link=no multicast=yes wireless=IEEE 802.11bgn
resources: irq:17 memory:d6400000-d640ffff
*-network
description: Ethernet interface
product: RTL8101E/RTL8102E PCI Express Fast Ethernet controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:06:00.0
logical name: eth0
version: 02
serial: 88:ae:1d:2b:36:ac
size: 100Mbit/s
capacity: 100Mbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list rom ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full ip=192.168.2.2 latency=0 link=yes multicast=yes port=MII speed=100Mbit/s
resources: irq:41 ioport:2000(size=256) memory:d2410000-d2410fff memory:d2400000-d240ffff memory:d2420000-d243ffff
Wi-Fi 网络显示为断开连接（灰色）奇怪的是，我看到一个 Wi-Fi 网络（不是我的），但不是我的或其他人的网络。该网络不需要密码。我点击它，尝试连接，然后收到一条错误消息：无法连接到 xxxxx ... 32) 接入点/org/freedesktop/NetworkManager/AccessPoint/0 不在扫描列表中。请有人帮忙