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我通过可启动的 USB 驱动器在笔记本电脑上下载并安装了 Ubuntu。操作系统运行良好且流畅，但通过 WiFi 上网非常慢：加载页面需要很长时间，有时甚至无法加载。WiFi 信号很好，但速度很差。
有没有办法来解决这个问题？
注意：我以前从未使用过 Ubuntu，所以请耐心等待。
信息：
输出lspci -nnk：
00:00.0 Host bridge [0600]: Intel Corporation Core Processor DRAM Controller [8086:0044] (rev 02)
Subsystem: Micro-Star International Co., Ltd. [MSI] Device [1462:1033]
Kernel driver in use: agpgart-intel
00:02.0 VGA compatible controller [0300]: Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] (rev 02)
Subsystem: Micro-Star International Co., Ltd. [MSI] Device [1462:1033]
Kernel driver in use: i915
00:16.0 Communication controller [0780]: Intel Corporation 5 Series/3400 Series Chipset HECI Controller [8086:3b64] (rev 06)
Subsystem: Micro-Star International Co., Ltd. [MSI] Device [1462:1033]
Kernel driver in use: mei_me
00:1a.0 USB controller [0c03]: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller [8086:3b3c] (rev 05)
Subsystem: Micro-Star International Co., Ltd. [MSI] Device [1462:1033]
Kernel driver in use: ehci-pci
00:1b.0 Audio device [0403]: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio [8086:3b56] (rev 05)
Subsystem: Micro-Star International Co., Ltd. [MSI] Device [1462:1033]
Kernel driver in use: snd_hda_intel
00:1c.0 PCI bridge [0604]: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 1 [8086:3b42] (rev 05)
Kernel driver in use: pcieport
00:1c.1 PCI bridge [0604]: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 2 [8086:3b44] (rev 05)
Kernel driver in use: pcieport
00:1c.3 PCI bridge [0604]: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 4 [8086:3b48] (rev 05)
Kernel driver in use: pcieport
00:1c.5 PCI bridge [0604]: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 6 [8086:3b4c] (rev 05)
Kernel driver in use: pcieport
00:1d.0 USB controller [0c03]: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller [8086:3b34] (rev 05)
Subsystem: Micro-Star International Co., Ltd. [MSI] Device [1462:1033]
Kernel driver in use: ehci-pci
00:1e.0 PCI bridge [0604]: Intel Corporation 82801 Mobile PCI Bridge [8086:2448] (rev a5)
00:1f.0 ISA bridge [0601]: Intel Corporation Mobile 5 Series Chipset LPC Interface Controller [8086:3b09] (rev 05)
Subsystem: Micro-Star International Co., Ltd. [MSI] Device [1462:1033]
Kernel driver in use: lpc_ich
00:1f.2 SATA controller [0106]: Intel Corporation 5 Series/3400 Series Chipset 4 port SATA AHCI Controller [8086:3b29] (rev 05)
Subsystem: Micro-Star International Co., Ltd. [MSI] Device [1462:1033]
Kernel driver in use: ahci
00:1f.3 SMBus [0c05]: Intel Corporation 5 Series/3400 Series Chipset SMBus Controller [8086:3b30] (rev 05)
Subsystem: Micro-Star International Co., Ltd. [MSI] Device [1462:1033]
00:1f.6 Signal processing controller [1180]: Intel Corporation 5 Series/3400 Series Chipset Thermal Subsystem [8086:3b32] (rev 05)
Subsystem: Micro-Star International Co., Ltd. [MSI] Device [1462:1033]
05:00.0 Network controller [0280]: Ralink corp. RT3090 Wireless 802.11n 1T/1R PCIe [1814:3090]
Subsystem: Micro-Star International Co., Ltd. [MSI] Device [1462:6891]
Kernel driver in use: rt2800pci
06:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller [10ec:8136] (rev 02)
Subsystem: Micro-Star International Co., Ltd. [MSI] Device [1462:1033]
Kernel driver in use: r8169
3f:00.0 Host bridge [0600]: Intel Corporation Core Processor QuickPath Architecture Generic Non-core Registers [8086:2c62] (rev 02)
Subsystem: Micro-Star International Co., Ltd. [MSI] Device [1462:1033]
3f:00.1 Host bridge [0600]: Intel Corporation Core Processor QuickPath Architecture System Address Decoder [8086:2d01] (rev 02)
Subsystem: Micro-Star International Co., Ltd. [MSI] Device [1462:1033]
3f:02.0 Host bridge [0600]: Intel Corporation Core Processor QPI Link 0 [8086:2d10] (rev 02)
Subsystem: Micro-Star International Co., Ltd. [MSI] Device [1462:1033]
3f:02.1 Host bridge [0600]: Intel Corporation 1st Generation Core Processor QPI Physical 0 [8086:2d11] (rev 02)
Subsystem: Micro-Star International Co., Ltd. [MSI] Device [1462:1033]
3f:02.2 Host bridge [0600]: Intel Corporation 1st Generation Core Processor Reserved [8086:2d12] (rev 02)
Subsystem: Micro-Star International Co., Ltd. [MSI] Device [1462:1033]
3f:02.3 Host bridge [0600]: Intel Corporation 1st Generation Core Processor Reserved [8086:2d13] (rev 02)
Subsystem: Micro-Star International Co., Ltd. [MSI] Device [1462:1033]
arthur@arthur-CR620:~$
更改了加密，现在运行良好。