大家下午好，
我有一台运行 15.04 的笔记本电脑（HP Probook 455 G2）。全新安装......它可以在 12.04 以上版本上运行......
安装很顺利，但有一个大问题。Wifi 已启用，但我看不到任何 wifi 网络或连接到任何隐藏的网络。不太确定接下来该怎么做....请参见下面的结果，这些结果来自我所知道的少量 Linux 命令！！:)
输出lspci -v：
01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 10)
Subsystem: Hewlett-Packard Company Device 2235
Flags: bus master, fast devsel, latency 0, IRQ 44
I/O ports at 4000 [size=256]
Memory at d5804000 (64-bit, non-prefetchable) [size=4K]
Memory at d5800000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: r8169
02:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter
Subsystem: Hewlett-Packard Company Device 2231
Physical Slot: 0
Flags: bus master, fast devsel, latency 0, IRQ 47
I/O ports at 3000 [size=256]
Memory at d4800000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: rtl8723be
03:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS5229 PCI Express Card Reader (rev 01)
Subsystem: Hewlett-Packard Company Device 2235
Physical Slot: 0-1
Flags: bus master, fast devsel, latency 0, IRQ 34
Memory at d3800000 (32-bit, non-prefetchable) [size=4K]
Capabilities: <access denied>
Kernel driver in use: rtsx_pci
输出lspci -nn：
00:00.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 15h (Models 30h-3fh) Processor Root Complex [1022:1422]
00:00.2 IOMMU [0806]: Advanced Micro Devices, Inc. [AMD] Family 15h (Models 30h-3fh) I/O Memory Management Unit [1022:1423]
00:01.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Kaveri [Radeon R6 Graphics] [1002:130a]
00:01.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI] Kaveri HDMI/DP Audio Controller [1002:1308]
00:02.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1424]
00:03.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1424]
00:03.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Family 15h (Models 30h-3fh) Processor Root Port [1022:1426]
00:03.2 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Family 15h (Models 30h-3fh) Processor Root Port [1022:1426]
00:03.4 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Family 15h (Models 30h-3fh) Processor Root Port [1022:1426]
00:04.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device [1022:1424]
00:10.0 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] FCH USB XHCI Controller [1022:7814] (rev 09)
00:11.0 SATA controller [0106]: Advanced Micro Devices, Inc. [AMD] FCH SATA Controller [AHCI mode] [1022:7801] (rev 40)
00:12.0 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] FCH USB OHCI Controller [1022:7807] (rev 11)
00:12.2 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] FCH USB EHCI Controller [1022:7808] (rev 11)
00:13.0 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] FCH USB OHCI Controller [1022:7807] (rev 11)
00:13.2 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] FCH USB EHCI Controller [1022:7808] (rev 11)
00:14.0 SMBus [0c05]: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller [1022:780b] (rev 16)
00:14.2 Audio device [0403]: Advanced Micro Devices, Inc. [AMD] FCH Azalia Controller [1022:780d] (rev 01)
00:14.3 ISA bridge [0601]: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge [1022:780e] (rev 11)
00:14.4 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] FCH PCI Bridge [1022:780f] (rev 40)
00:14.5 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] FCH USB OHCI Controller [1022:7809] (rev 11)
00:18.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 15h (Models 30h-3fh) Processor Function 0 [1022:141a]
00:18.1 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 15h (Models 30h-3fh) Processor Function 1 [1022:141b]
00:18.2 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 15h (Models 30h-3fh) Processor Function 2 [1022:141c]
00:18.3 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 15h (Models 30h-3fh) Processor Function 3 [1022:141d]
00:18.4 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 15h (Models 30h-3fh) Processor Function 4 [1022:141e]
00:18.5 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 15h (Models 30h-3fh) Processor Function 5 [1022:141f]
01:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 10)
02:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter [10ec:b723]
03:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS5229 PCI Express Card Reader [10ec:5229] (rev 01)
输出lsmod | grep 819
amdkfd 81920 1
r8169 81920 0
输出modinfo r8192e_pci | grep 8192：
filename: /lib/modules/3.19.0-18-generic/kernel/drivers/staging/rtl8192e/rtl8192e/r8192e_pci.ko
firmware: RTL8192E/data.img
firmware: RTL8192E/main.img
firmware: RTL8192E/boot.img
alias: pci:v000010ECd00008192sv*sd*bc*sc*i*
输出iwconfig：
eth0 no wireless extensions.
wlan0 IEEE 802.11bgn ESSID:off/any
Mode:Managed Access Point: Not-Associated Tx-Power=20 dBm
Retry short limit:7 RTS thr=2347 B Fragment thr:off
Power Management:off
lo no wireless extensions.
输出sudo iwlist wlan0 scan：
wlan0 No scan results
输出rfkill list all：
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
1: hci0: Bluetooth
Soft blocked: yes
Hard blocked: no
推荐修复：echo“options rtl8723be fwlps=N ips=N”| sudo tee /etc/modprobe.d/rtl8723be.conf
输出modinfo -p rtl8723be：
swlps: (bool)
swenc:using hardware crypto (default 0 [hardware])
(bool)
ips:using no link power save (default 1 is open)
(bool)
fwlps:using linked fw control power save (default 1 is open)
(bool)
msi:Set to 1 to use MSI interrupts mode (default 0)
debug:Set debug level (0-5) (default 0) (int)
disable_watchdog:Set to 1 to disable the watchdog (default 0)
(bool)
任何帮助都将不胜感激，如果我们能让它工作的话，就会做一个侧手翻！！:)
答案1
我无法直接回答您详细的步骤（从 Windows 安装编写），但您可以这样做：
git clone https://github.com/lwfinger/rtlwifi_new.git
然后简单地编译
make
如果一切顺利，那就做
sudo make install
PS：您需要一个相对较新的内核（我相信是 3.18 之后的版本）和与之匹配的标头。此外，似乎支持仍未完成：同一台笔记本电脑
答案2
Ubuntu 15.04 需要某些盒子上的文件（HP455G2 options rtl8723be msi=1 ips=0）/etc/modprobe.d/rtl8723be.conf