我一直在想办法解决我的 Wi-Fi 问题。我在这台电脑上安装了 Ubuntu，很高兴一切都能正常使用。但过了一段时间，我意识到我的 Wi-Fi 连接有问题。
互联网连接正常，持续 5 分钟或更短时间，但随后就断线了。我不得不重新启动 Wi-Fi 连接，它正常持续了 5 分钟，然后又发生了同样的事情，断线了。
我读到过一些人遇到过同样的问题，或者根本没有 Wi-Fi 连接，例如：在联想 Yoga 11s 上安装 Ubuntu Linux我按照步骤操作，尝试更换为 Ubuntu 14.04，以为新版本会解决这个问题，但是问题依然存在。
然后我试着在这里问。我的电脑是联想 Yoga 11s，我的操作系统是 Ubuntu 14.04 LTS，我的 Wi-Fi 适配器来自 Realtek。
lspci -knn终端上的输出 ：
00:00.0 Host bridge [0600]: Intel Corporation 3rd Gen Core processor DRAM Controller [8086:0154] (rev 09)
Subsystem: Lenovo Device [17aa:3977]
Kernel driver in use: ivb_uncore
00:02.0 VGA compatible controller [0300]: Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09)
Subsystem: Lenovo Device [17aa:3977]
Kernel driver in use: i915
00:04.0 Signal processing controller [1180]: Intel Corporation 3rd Gen Core Processor Thermal Subsystem [8086:0153] (rev 09)
Subsystem: Lenovo Device [17aa:3977]
00:14.0 USB controller [0c03]: Intel Corporation 7 Series/C210 Series Chipset Family USB xHCI Host Controller [8086:1e31] (rev 04)
Subsystem: Lenovo Device [17aa:3977]
Kernel driver in use: xhci_hcd
00:16.0 Communication controller [0780]: Intel Corporation 7 Series/C210 Series Chipset Family MEI Controller #1 [8086:1e3a] (rev 04)
Subsystem: Lenovo Device [17aa:3977]
Kernel driver in use: mei_me
00:1a.0 USB controller [0c03]: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #2 [8086:1e2d] (rev 04)
Subsystem: Lenovo Device [17aa:3977]
Kernel driver in use: ehci-pci
00:1b.0 Audio device [0403]: Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller [8086:1e20] (rev 04)
Subsystem: Lenovo Device [17aa:3977]
Kernel driver in use: snd_hda_intel
00:1d.0 USB controller [0c03]: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #1 [8086:1e26] (rev 04)
Subsystem: Lenovo Device [17aa:3977]
Kernel driver in use: ehci-pci
00:1f.0 ISA bridge [0601]: Intel Corporation QS77 Express Chipset LPC Controller [8086:1e56] (rev 04)
Subsystem: Lenovo Device [17aa:3977]
Kernel driver in use: lpc_ich
00:1f.2 SATA controller [0106]: Intel Corporation 7 Series Chipset Family 6-port SATA Controller [AHCI mode] [8086:1e03] (rev 04)
Subsystem: Lenovo Device [17aa:3977]
Kernel driver in use: ahci
00:1f.3 SMBus [0c05]: Intel Corporation 7 Series/C210 Series Chipset Family SMBus Controller [8086:1e22] (rev 04)
Subsystem: Lenovo Device [17aa:3977]
00:1f.6 Signal processing controller [1180]: Intel Corporation 7 Series/C210 Series Chipset Family Thermal Management Controller [8086:1e24] (rev 04)
Subsystem: Lenovo Device [17aa:3977]
当我grep Net -A2在终端上打字时，什么也没有发生。
当我输入 l 时spci -knn | grep Net -A2什么也没有发生，但是光标返回到原点。
结果如下lsusb：
Bus 004 Device 004: ID 0bda:1724 Realtek Semiconductor Corp. RTL8723AU 802.11n WLAN Adapter
Bus 004 Device 003: ID 2047:0855 Texas Instruments Invensense Embedded MotionApp HID Sensor
Bus 004 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 004 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 004: ID 03eb:8814 Atmel Corp.
Bus 003 Device 003: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller
Bus 003 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
答案1
我在这个网站上找到了答案：https://github.com/lwfinger/rtl8723au/issues/52。
按照问题中的链接说明安装 rtl8723au 驱动器后，我将本机 rtl8723au 内核模块列入黑名单。我做了：
gksudo gedit /etc/modprobe/blacklist.conf
然后我在黑名单文本中写道：
blacklist r8723au
现在我的wifi很稳定，网速也提升了很多。