ubuntu22.04mt76x2u网卡断网

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[315708.280716] mt76x2u 1-7:1.0:vendor request reg:07.off:1200 failed:-110

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$ lsusb -v | grep -i mt76
Couldn't open device, some information will be missing
Couldn't open device, some information will be missing
Couldn't open device, some information will be missing
Couldn't open device, some information will be missing
Couldn't open device, some information will be missing
Bus 001 Device 004: ID 0e8d:7612 MediaTek Inc. MT7612U 802.11a/b/g/n/ac Wireless Adapter
  idProduct          0x7612 MT7612U 802.11a/b/g/n/ac Wireless Adapter
Couldn't open device, some information will be missing
Couldn't open device, some information will be missing
Couldn't open device, some information will be missing
Couldn't open device, some information will be missing
Couldn't open device, some information will be missing
Couldn't open device, some information will be missing
$ lsusb
Bus 001 Device 004: ID 0e8d:7612 MediaTek Inc. MT7612U 802.11a/b/g/n/ac Wireless Adapter

解决办法

1.查看网卡是不是插在了usb3.0上，换一个2.0插口。480代表插入usb2.0，插入正确，不是这个问题。

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#执行：
lsusb -t l grep -B2 -A2 mt76
#结果
Port 3: Dev 7,1f 0,Class=Human Interface Device, Driver=usbhid, 1.5
Port 2:Dev 5,If 0,class=Human Interface Device, Driver=usbhid, 1.5M
Port 7: Dev 4,1f 0,Class=Vendor specific class, Driver=nt76x2u, 480M
Port 10:Dev 6,1f o,Class=Hub, Driver=hub/4p,
480M

2.首先修改网卡的模式

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echo "options mt76_usb disable_usb_sg=1" | sudo tee /etc/modprobe.d/mt76-usb.conf
sudo update-initramfs -u

然后禁止使用usb省电

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sudo su
cat > /etc/udev/rules.d/50-mt7612u-power.rules <<EOF
ACTION=="add", SUBSYSTEM=="usb", ATTRS{idVendor}=="0e8d", ATTRS{idProduct}=="7612", ATTR{power/control}="on"
ATTR{power/autosuspend}="0"
ATTR{power/autosuspend_delay_ms}="0"
EOF
exit

最后重启电脑

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sudo reboot

开机执行，如果没有报错就是修改完成

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dmesg | grep -i mt76x2u

其他（deepseek）

网卡参数调优

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# 1. 关闭网卡节能模式（避免超时）
sudo iw dev wlx0013ef4f662a set power_save off
# 2. 调整无线速率（强制802.11n，避免协商异常）
sudo iw dev wlx0013ef4f662a set bitrates ht-mcs-5 7
# 3. 重启网络服务
sudo systemctl restart NetworkManager