Ubuntu 23.04 Slow Internet

Sameer Trivedi

5/28/24, 9:40 AM

I have installed Ubuntu 23.04 on my HP 15 fc0025au laptop. However after install I am facing a strange problem of extremely slow internet. When I turn the WiFi off and on again, the speed comes back to normal. But is again slow after every restart. here is the output of the sudo lshw -C network command

  *-network                 
       description: Wireless interface
       product: Realtek Semiconductor Co., Ltd.
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:02:00.0
       logical name: wlp2s0
       version: 00
       serial: 40:1a:58:0c:09:1a
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=rtw89_8852be driverversion=6.2.0-20-generic firmware=N/A ip=192.168.136.225 latency=0 link=yes multicast=yes wireless=IEEE 802.11
       resources: irq:82 ioport:f000(size=256) memory:fce00000-fcefffff

and the inxi -Nn command

Network:
  Device-1: Realtek driver: rtw89_8852be
  IF: wlp2s0 state: up mac: 40:1a:58:0c:09:1a

My Network Card is RTL8852BE, before 23.04 happened I had to manually install drivers from this GitHub repo: https://github.com/lwfinger/rtw89 Rest assured, this is a clean install of 23.04 both Bluetooth and WiFi worked out of the box, except for this strange issue after booting.

411

0 + 5

networking

realtek

drivers

23.04

waltinator

5/28/24, 3:07 PM

What's your WiFi MTU? `ip link` will tell you. For WiFi, it should be 1492, not 1500.

Sameer Trivedi

5/28/24, 3:47 PM

It is showing mtu 1500, should I change it? Why does turning wifi off and on fix it?

vidarlo

5/28/24, 9:28 PM

There's nothing indicating that this is related to mtu, and lowering mtu on one device on a network can lead to problems. Furthermore, there's no reason why wifi needs a mtu of 1492.

Mahler

5/28/24, 9:29 PM

Try to change WiFi channel in the router if it is too loaded.

Sameer Trivedi

5/29/24, 2:24 AM

No it is not loaded. I have no interfering devices. Just the router and my laptop. And this issue only happens when Ubuntu starts as I mentioned. Turning the device wifi off and on fixes it.

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: Ubuntu 23.04 Slow Internet

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