Hello everyone, I am currently using EndeavourOS on my personal PC and connecting to the internet using a Realtek Wi-Fi dongle (driver: rtl8852bu). Yesterday my dad bought a router from China that is Wi-Fi 7 capable, Xiaomi BE5000, and after setting up and connecting to it, for some reasons every few seconds I would lose internet connection, regardless of what I am doing: updating system, watching Youtube, browsing web, etc. I am not a power user nor understand tech in a deep level, so I assume that there is some weird interaction with module 802.11 be (Wi-Fi 7) overall, or is it like a router problem?
Greetings @horugane! 
As that router is only very recently installed, are you able to confirm that these connection issues are only affecting your system (and not also others on the same network)?
I’m the only person in the family to use Linux while others are using Windows and other devices normally, so it’s only affecting me. The previous router was using Wi-Fi 6e so the connection was consistent at least.
It wasn’t so much a question of who’s using Linux. If it was a router issue, it’d impact everyone regardless of what they use. Anyway, lets assume it’s working perfectly for everyone else.
In the process of elmination, are you able to remove the WiFi dongle, connect via LAN cable, and confirm the issue goes away?
I removed the WiFi dongle and replaced it with something else, it’s a little more consistent now this issue usually happens a few minutes after starting up the PC.
connect via LAN cable
I will try that in a little bit, my home is an apartment so it’s going to take some time to align the cables properly.
Let us know if this remains a consistent fix. If it does, it would suggest the issue is specific to the Realtek RTL-8852BU dongle, or possibly the WiFi standard it was specifically using to connect with your new router (those different devices may support differing standards).
1 Like
If you still have the old router, you can connect old router’s WAN port to one of the new router’s ethernet ports and keep using the old router while others use the new router.
Or you can use the extender mode that replicates the signal of the new router by the old router.
An update, well sort of.
I haven’t got time to grab the tools necessary to set up the WLAN connection (the cables already inside the walls), but my dad out of nowhere wants to build a new PC for the business, and asked me to swap out the previous motherboard (ASUS TUF Plus Z690 D4) to the current motherboard ASUS Prime Z690-P WiFi D4. Wi-Fi onboard automatically works out of the box, not sure if it works with Realtek driver from the previous driver or not, I don’t know, but it’s hasn’t lost connection randomly anymore. Another problem arises when most of the time the speed of the internet is pretty low (90-100Mbps) while pretty rarely it reaches 250Mbps on Ookla Speedtest. Not sure how to fix the inconsistency, but the original problem is fixed. I can assume that the adapter is very finicky with the new router so that’s that.
It’s always worth running the same test on another system, as it’s possible it’s your router or Internet connection in general that’s the issue.
So final update, probably the end of this topic. The difference with the internet speed was due to the many surfaces in between of the router and the Wi-Fi antenna, so moving my PC to another place drastically increased the internet speed to the actual speed.
Thank you Bink and manuel for the assistance.
2 Likes
Great that you got it solved!
Wireless communication is not easy always… 
Glad to hear it’s solved.
There are different standards of WiFi also, which if selected and configured carefully, can significantly improve range, albeit in some cases, at the expense of bandwidth. Depending on what you’re doing though, the bandwidth may be sufficient.
I have a single central WiFi AP in my home, limited to the 802.11n protocol (WiFi 4, circa 2009!) on the 2.4GHz frequency, running in the lowest amplification (power save) mode, and I have full coverage in my whole house.
The theoretical range of 802.11n is more than twice that of 802.11be (WiFi 7), but at the significant cost of bandwidth, with WiFi 7 offering between 40 and 160 times more bandwidth!
As a general rule, lower frequencies = lower bandwidth = greater range. Not unlike the pumpin car driving past where all you can hear is the low frequency subwoofer thumpin, but the higher frequencies are trapped within the car.
If you’re able to selectively choose to connect to your access point on the 2.4GHz frequency, you’ll likely have better range at the cost of bandwidth. If you connect to the 5GHz or 6GHz frequency, you’ll have better bandwidth, at the cost of range.
Higher bandwidth doesn’t necessarily mean higher speed, unless you’re maxing that bandwidth and it becomes a bottleneck, in which case more would likely be better.
See a comparison of protocols and their frequencies, bandwidths and ranges here: