Wifi disconnecting [SOLVED]

ganrob · 2025-08-15 16:52:01

After last update, my Wi-Fi is disconnecting from internet. But during this the connection between pc and router is active.

Last edited by ganrob (2025-08-17 02:19:31)

seth · 2025-08-15 19:21:34

https://bbs.archlinux.org/viewtopic.php?id=57855
http://www.catb.org/~esr/faqs/smart-questions.html

Can you still "ping 8.8.8.8" when "Wi-Fi is disconnecting from internet"?

ganrob · 2025-08-15 19:28:24

seth wrote:

https://bbs.archlinux.org/viewtopic.php?id=57855
http://www.catb.org/~esr/faqs/smart-questions.html
Can you still "ping 8.8.8.8" when "Wi-Fi is disconnecting from internet"?

No, unfortunately.

seth · 2025-08-15 21:21:25

So not only a DNS issue.
Open and read the links I posted and make an effort to provide details on the situation (the network configuration, layout, notably any VPN involvement and also how you determine that "the connection between pc and router is active") or in doubt at least your system journal.

Your OP says "sometimes my internet doesn't work™ but my LAN does" what would mean the problem is your ISP.

ganrob · 2025-08-15 23:26:18

seth wrote:

So not only a DNS issue.
Open and read the links I posted and make an effort to provide details on the situation (the network configuration, layout, notably any VPN involvement and also how you determine that "the connection between pc and router is active") or in doubt at least your system journal.
Your OP says "sometimes my internet doesn't work™ but my LAN does" what would mean the problem is your ISP.

Yes, absolutely. I'm very grateful to you because you've helped me before.

In this case, I'm almost 99% sure this is a driver or kernel issue (less likely the kernel). The problem appeared after a driver and kernel update. I had a similar issue a year ago. Additionally, I confirmed that the connection to the router interface also drops. The router is working correctly; other devices on the same network have internet access simultaneously. I’m not using a VPN or any other traffic tunneling software.

After the connection drops, reconnecting helps temporarily, but then it fails again. I could roll back the system, but I’m not doing it yet because I want to understand the root cause of the problem. Please help me figure this out.

https://pastebin.com/EABi8uVy

seth · 2025-08-16 07:18:42

You're not losing the connection, but there's the wifi, two rj45 NICs and a bridge and dnsmasq
Since you cannot ping 8.8.8.8 it's not (only) the DNS

ip r get 8.8.8.8
ip r get 192.168.100.1
ip r get 192.168.122.1
ip r # so we record the entire routing table

ganrob · 2025-08-16 13:00:53

seth wrote:

You're not losing the connection, but there's the wifi, two rj45 NICs and a bridge and dnsmasq
Since you cannot ping 8.8.8.8 it's not (only) the DNS
ip r get 8.8.8.8
ip r get 192.168.100.1
ip r get 192.168.122.1
ip r # so we record the entire routing table

When the connection is ok the result are:

❯ ip r get 8.8.8.8
8.8.8.8 via 192.168.100.1 dev wlan0 src 192.168.100.55 uid 1000 
    cache 
❯ ip r get 192.168.100.1
192.168.100.1 dev wlan0 src 192.168.100.55 uid 1000 
    cache 
❯ ip r get 192.168.122.1
local 192.168.122.1 dev lo src 192.168.122.1 uid 1000 
    cache <local> 
❯ ip r
default via 192.168.100.1 dev wlan0 proto dhcp src 192.168.100.55 metric 600 
192.168.100.0/24 dev wlan0 proto kernel scope link src 192.168.100.55 metric 600 
192.168.122.0/24 dev virbr0 proto kernel scope link src 192.168.122.1 linkdown

ganrob · 2025-08-17 01:27:59

seth wrote:

You're not losing the connection, but there's the wifi, two rj45 NICs and a bridge and dnsmasq
Since you cannot ping 8.8.8.8 it's not (only) the DNS
ip r get 8.8.8.8
ip r get 192.168.100.1
ip r get 192.168.122.1
ip r # so we record the entire routing table

I think this is my case... https://www.reddit.com/r/archlinux/comm … rtl8852be/

I don't want to downgrade firmware . I'll use USB Wi-Fi until they are repairing driver.

ganrob · 2025-08-17 02:17:33

Yes, that's true. I rolled back and haven't updated. The disconnections stopped. Be careful if you have an RTL8852BE like me. Do not update the driver!

core/linux-firmware-realtek 20250708-1 -> 20250808-1

seth · 2025-08-17 07:11:54

Ah, I missed that

in #5 you wrote:

Additionally, I confirmed that the connection to the router interface also drops

Arch Linux

#1 2025-08-15 16:52:01

Wifi disconnecting [SOLVED]

#2 2025-08-15 19:21:34

Re: Wifi disconnecting [SOLVED]

#3 2025-08-15 19:28:24

Re: Wifi disconnecting [SOLVED]

#4 2025-08-15 21:21:25

Re: Wifi disconnecting [SOLVED]

#5 2025-08-15 23:26:18

Re: Wifi disconnecting [SOLVED]

#6 2025-08-16 07:18:42

Re: Wifi disconnecting [SOLVED]

#7 2025-08-16 13:00:53

Re: Wifi disconnecting [SOLVED]

#8 2025-08-17 01:27:59

Re: Wifi disconnecting [SOLVED]

#9 2025-08-17 02:17:33

Re: Wifi disconnecting [SOLVED]

#10 2025-08-17 07:11:54

Re: Wifi disconnecting [SOLVED]

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