我在 HP 笔记本电脑上使用 ubuntu 16.04。遇到了 WiFi 方面的一个奇怪问题。系统随机停止检测可用的 WiFi，为了再次检测到它们，我挂起电脑然后重新打开。我尝试了 Ubuntu 社区建议的许多补救措施，但都无济于事。 lspci 的输出
00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 15h (Models 10h-1fh) Processor Root Complex
00:01.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Richland [Radeon HD 8650G]
00:01.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Trinity HDMI Audio Controller
00:04.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] Family 15h (Models 10h-1fh) Processor Root Port
00:05.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] Family 15h (Models 10h-1fh) Processor Root Port
00:07.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] Family 15h (Models 10h-1fh) Processor Root Port
00:10.0 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB XHCI Controller (rev 09)
00:10.1 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB XHCI Controller (rev 09)
00:11.0 SATA controller: Advanced Micro Devices, Inc. [AMD] FCH SATA Controller [AHCI mode] (rev 40)
00:12.0 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB OHCI Controller (rev 11)
00:12.2 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB EHCI Controller (rev 11)
00:13.0 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB OHCI Controller (rev 11)
00:13.2 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB EHCI Controller (rev 11)
00:14.0 SMBus: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller (rev 16)
00:14.2 Audio device: Advanced Micro Devices, Inc. [AMD] FCH Azalia Controller (rev 01)
00:14.3 ISA bridge: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge (rev 11)
00:14.4 PCI bridge: Advanced Micro Devices, Inc. [AMD] FCH PCI Bridge (rev 40)
00:14.5 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB OHCI Controller (rev 11)
00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 15h (Models 10h-1fh) Processor Function 0
00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 15h (Models 10h-1fh) Processor Function 1
00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 15h (Models 10h-1fh) Processor Function 2
00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 15h (Models 10h-1fh) Processor Function 3
00:18.4 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 15h (Models 10h-1fh) Processor Function 4
00:18.5 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 15h (Models 10h-1fh) Processor Function 5
01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 0c)
02:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS5229 PCI Express Card Reader (rev 01)
03:00.0 Network controller: Ralink corp. RT3290 Wireless 802.11n 1T/1R PCIe
03:00.1 Bluetooth: Ralink corp. RT3290 Bluetooth
dmesg | grep -i firmware 的输出 [ 0.013588] [固件信息]：CPU：重新启用已禁用的拓扑扩展支持。[ 0.276013] [固件信息]：CPU：重新启用已禁用的拓扑扩展支持。[ 0.278386] [固件信息]：CPU：重新启用已禁用的拓扑扩展支持。[ 0.280625] [固件信息]：CPU：重新启用已禁用的拓扑扩展支持。[ 2.867087] [drm] 发现 VCE 固件/反馈版本 50.0.1 / 17！ [ 26.570449] ieee80211 phy0：rt2x00lib_request_firmware：信息 - 正在加载固件文件“rt3290.bin” [ 26.997083] ieee80211 phy0：rt2x00lib_request_firmware：信息 - 检测到固件 - 版本：0.37 [ 363.469793] [固件错误]：cpu 0，尝试将 APIC500（LVT 偏移量 0）用于向量 0xf9，但该寄存器已在另一个 cpu 上用于向量 0x400 [ 363.469795] [固件错误]：cpu 0，无法为 bank 4、block 0 设置阈值中断（MSR00000413=0xc000000001000000）[ 363.469796] [固件错误]：cpu 0，尝试将 APIC500（LVT 偏移量 0）用于向量 0xf9，但该寄存器已在另一个 cpu 上用于向量 0x400 [363.469797] [固件错误]：cpu 0，无法为 bank 4、block 1 设置阈值中断（MSRC0000408=0xc000000001000000）
答案1
我知道这发生在我身上，这令人沮丧：
这似乎帮助我
进入司机内部并激活
- Intel 微代码驱动程序
另一件事sudo service network-manager restart
有助于缓解问题