Instalei o ubuntu versão 22.04 em dual boot com windows 11. Ubuntu funcionou normalmente tudo 100%. Até que hoje fui usar o ubuntu e não consigo acessar a internet é como se eu nem tivesse uma placa de rede instalada no meu pc kkk tudo sumiu. Sou iniciante, LEMBRANDO QUE NO WINDOWS 11 A INTERNET ESTAR NORMAL.
Lembrando que sem informações básicas do hardware, é impossível advinhar o problema 
Como fornecer boas informações
Motherboard ga-h61m-s1 rev 4.0 placa de rede é onboard mesmo
Conexão via cabo ethernet
Deixe a saída do comando aqui
lspci -v
00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor DRAM Controller (rev 09)
Subsystem: Gigabyte Technology Co., Ltd Xeon E3-1200 v2/3rd Gen Core processor DRAM Controller
Flags: bus master, fast devsel, latency 0
Capabilities: <access denied>
Kernel driver in use: ivb_uncore
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor PCI Express Root Port (rev 09) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 25
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
I/O behind bridge: 0000e000-0000efff [size=4K]
Memory behind bridge: f6000000-f70fffff [size=17M]
Prefetchable memory behind bridge: 00000000e0000000-00000000f1ffffff [size=288M]
Capabilities: <access denied>
Kernel driver in use: pcieport
00:16.0 Communication controller: Intel Corporation 6 Series/C200 Series Chipset Family MEI Controller #1 (rev 04)
Subsystem: Gigabyte Technology Co., Ltd 6 Series/C200 Series Chipset Family MEI Controller
Flags: bus master, fast devsel, latency 0, IRQ 11
Memory at f7209000 (64-bit, non-prefetchable) [size=16]
Capabilities: <access denied>
00:1a.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 (rev 05) (prog-if 20 [EHCI])
Subsystem: Gigabyte Technology Co., Ltd 6 Series/C200 Series Chipset Family USB Enhanced Host Controller
Flags: bus master, medium devsel, latency 0, IRQ 16
Memory at f7207000 (32-bit, non-prefetchable) [size=1K]
Capabilities: <access denied>
Kernel driver in use: ehci-pci
00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 05)
Subsystem: Gigabyte Technology Co., Ltd 6 Series/C200 Series Chipset Family High Definition Audio Controller
Flags: fast devsel, IRQ 3
Memory at f7200000 (64-bit, non-prefetchable) [disabled] [size=16K]
Capabilities: <access denied>
00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 (rev b5) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 16
Bus: primary=00, secondary=02, subordinate=02, sec-latency=0
I/O behind bridge: [disabled]
Memory behind bridge: [disabled]
Prefetchable memory behind bridge: [disabled]
Capabilities: <access denied>
Kernel driver in use: pcieport
00:1c.4 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 5 (rev b5) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 16
Bus: primary=00, secondary=03, subordinate=03, sec-latency=0
I/O behind bridge: 0000d000-0000dfff [size=4K]
Memory behind bridge: f7100000-f71fffff [size=1M]
Prefetchable memory behind bridge: 00000000f2100000-00000000f21fffff [size=1M]
Capabilities: <access denied>
Kernel driver in use: pcieport
00:1d.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 (rev 05) (prog-if 20 [EHCI])
Subsystem: Gigabyte Technology Co., Ltd 6 Series/C200 Series Chipset Family USB Enhanced Host Controller
Flags: bus master, medium devsel, latency 0, IRQ 23
Memory at f7206000 (32-bit, non-prefetchable) [size=1K]
Capabilities: <access denied>
Kernel driver in use: ehci-pci
00:1f.0 ISA bridge: Intel Corporation H61 Express Chipset LPC Controller (rev 05)
Subsystem: Gigabyte Technology Co., Ltd H61 Express Chipset LPC Controller
Flags: bus master, medium devsel, latency 0
Capabilities: <access denied>
00:1f.2 IDE interface: Intel Corporation 6 Series/C200 Series Chipset Family Desktop SATA Controller (IDE mode, ports 0-3) (rev 05) (prog-if 8f [PCI native mode controller, supports both channels switched to ISA compatibility mode, supports bus mastering])
Subsystem: Gigabyte Technology Co., Ltd 6 Series/C200 Series Chipset Family Desktop SATA Controller (IDE mode, ports 0-3)
Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 19
I/O ports at f0d0 [size=8]
I/O ports at f0c0 [size=4]
I/O ports at f0b0 [size=8]
I/O ports at f0a0 [size=4]
I/O ports at f090 [size=16]
I/O ports at f080 [size=16]
Capabilities: <access denied>
Kernel driver in use: ata_piix
00:1f.3 SMBus: Intel Corporation 6 Series/C200 Series Chipset Family SMBus Controller (rev 05)
Subsystem: Gigabyte Technology Co., Ltd 6 Series/C200 Series Chipset Family SMBus Controller
Flags: medium devsel, IRQ 11
Memory at f7205000 (64-bit, non-prefetchable) [disabled] [size=256]
I/O ports at f000 [size=32]
00:1f.5 IDE interface: Intel Corporation 6 Series/C200 Series Chipset Family Desktop SATA Controller (IDE mode, ports 4-5) (rev 05) (prog-if 85 [PCI native mode-only controller, supports bus mastering])
Subsystem: Gigabyte Technology Co., Ltd 6 Series/C200 Series Chipset Family Desktop SATA Controller (IDE mode, ports 4-5)
Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 19
I/O ports at f070 [size=8]
I/O ports at f060 [size=4]
I/O ports at f050 [size=8]
I/O ports at f040 [size=4]
I/O ports at f030 [size=16]
I/O ports at f020 [size=16]
Capabilities: <access denied>
Kernel driver in use: ata_piix
01:00.0 VGA compatible controller: NVIDIA Corporation GM107 [GeForce GTX 750 Ti] (rev a2) (prog-if 00 [VGA controller])
Subsystem: NVIDIA Corporation GM107 [GeForce GTX 750 Ti]
Flags: bus master, fast devsel, latency 0, IRQ 26
Memory at f6000000 (32-bit, non-prefetchable) [size=16M]
Memory at e0000000 (64-bit, prefetchable) [size=256M]
Memory at f0000000 (64-bit, prefetchable) [size=32M]
I/O ports at e000 [size=128]
Expansion ROM at 000c0000 [virtual] [disabled] [size=128K]
Capabilities: <access denied>
Kernel driver in use: nvidia
Kernel modules: nvidiafb, nvidia_drm, nvidia
01:00.1 Audio device: NVIDIA Corporation GM107 High Definition Audio Controller [GeForce 940MX] (rev a1)
Subsystem: NVIDIA Corporation GM107 High Definition Audio Controller [GeForce 940MX]
Flags: fast devsel, IRQ 10
Memory at f7080000 (32-bit, non-prefetchable) [disabled] [size=16K]
Capabilities: <access denied>
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 0c)
Subsystem: Gigabyte Technology Co., Ltd Onboard Ethernet
Flags: bus master, fast devsel, latency 0, IRQ 11
I/O ports at d000 [size=256]
Memory at f7100000 (64-bit, non-prefetchable) [size=4K]
Memory at f2100000 (64-bit, prefetchable) [size=16K]
Capabilities: <access denied>
Ok
Crie o arquivo e adicione o conteúdo
/etc/modprobe.d/nor8169.conf
# não carregar o módulo 'r8169' no boot.
blacklist r8169
Reinicie e veja se funciona
Como eu crio esse arquivo e adiciono
esse contúdo que vc ta falando ?
sudo nano /etc/modprobe.d/nor8169.conf
E adicione
blacklist r8169
No fim para salvar
No teclado
Ctrl+x
Não deu certo 
Ok desfaça o procedimento
Use rm com cuidado… coloque certo o caminho do arquivo
sudo rm -rf /etc/modprobe.d/nor8169.conf
Gigabyte Motherboard with Realtek 8111/8168/8411
With motherboards such as the Gigabyte GA-990FXA-UD3, booting with IOMMU off (which can be the default) will cause the network interface to be unreliable, often failing to connect or connecting but allowing no throughput. This will apply to the onboard NIC and to any other pci-NIC in the box because the IOMMU setting affects the entire network interface on the board. Enabling IOMMU and booting with the install media will throw AMD I-10/xhci page faults for a second, but then boots normally, resulting in a fully functional onboard NIC (even with the r8169 module).
When configuring the boot process for your installation, add iommu=soft as a kernel parameter to eliminate the error messages on boot and restore USB3.0 functionality.
resumo
sudo nano /etc/defaults/grub
Depois do hide adicione iommu=soft
Ctrl+x para salvar
E reinicie o pc
Fiz o procedimento mas não funcionou
Antes de tentar parâmetro no kernel, eu tentaria apenas atualizar o sistema e ver se já não foi corrigido. Pode usar seu celular como receptor do wifi e compartilhar conexão via USB (modo tethering usb)
Tenta carregar o drive
sudo modprobe r8169
E veja se funciona
Pelo lspci nem carrega o módulo
Se funcionar tem que colocar para ibiciar no boot
Funcionou?