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I can't connect to the internet on Ubuntu 20.04. I checked many things:

  1. The wireless adapter is enabled.
  2. Localhost ping is OK.
  3. Ping to 8.8.8.8 is ok.
  4. I can connect to the Internet via cable.
  5. I can connect to the Internet through a mobile hotspot.
  6. I reinstalled my wireless network drivers
  7. I updated my software driver

Although I can connect to the Internet through the modem with other devices, my laptop cannot connect to the Internet in the same way.

The output of lspci -knn | grep Net -A3:

03:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter [10ec:b723]
    Subsystem: Hewlett-Packard Company RTL8723BE PCIe Wireless Network Adapter [103c:804c]
    Kernel driver in use: rtl8723be
    Kernel modules: rtl8723be

The output of uname -a; dkms status:

Linux siamak-HP-Notebook 5.19.0-32-generic #33~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Mon Jan 30 17:03:34 UTC 2 x86_64 x86_64 x86_64 GNU/Linux
Rishon_JR
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Finisher
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    Is it a new install? Did you have this problem from the beginning, or did it happen after you did something? Also the question is unclear. If you can ping 8.8.8.8, it means that you have an internet connection. – Pilot6 Feb 23 '23 at 14:36
  • No, the installation is not new and I had no problem until the day before this problem started two days ago. Yes, it is confusing for me too. But in my opinion, the connection is very weak, and while there is apparently internet, no page opens. – Finisher Feb 23 '23 at 14:53
  • Please [edit] your question and add output of lspci -knn | grep Net -A3 terminal command. – Pilot6 Feb 23 '23 at 14:53
  • OK, please add output of uname -a; dkms status output. – Pilot6 Feb 23 '23 at 15:07
  • Try to boot with a previous 5.15 kernel using grub menu and check. – Pilot6 Feb 23 '23 at 15:15
  • Although I changed the kernel to 5.15, nothing changed and I have the previous problem. – Finisher Feb 23 '23 at 15:55
  • It can be a hardware problem too. Like a bad connection of an antenna. – Pilot6 Feb 23 '23 at 15:56
  • I think so, Thank you so much for your time. – Finisher Feb 23 '23 at 15:57
  • This answer solved my problem. https://askubuntu.com/a/1309059/1675384 – Finisher Feb 24 '23 at 13:26
  • That answer could not solve your problem it is unrelated to your hardware. You don't have a Broadcom device. – Pilot6 Feb 24 '23 at 13:27
  • This problem confused me. If it was related to the hardware of my system, it should not connect to the Internet with other routers. And if the problem was with the modem, I should not connect to the Internet with devices through this modem. I checked many things but interestingly this answer solved my problem. – Finisher Feb 24 '23 at 13:31
  • It is a coincidence. That answer installs drivers for a device that you don't have. – Pilot6 Feb 24 '23 at 13:32
  • I made some changes to the network card settings almost at the same time, and on the other hand, the signal may be weak. For some reason, the signal strength improved because I connected to different networks at the same time. I connected to the internet through some, but not through others. So, it is most likely that the signal strength of the routers has improved because I do not have access to them to check and apply the settings, and the problem is not with the system hardware. And all these things happened at the same time :-). Thank you. – Finisher Feb 24 '23 at 14:13

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