You are not logged in.

#1 2025-08-15 09:06:11

firewalker
Member
From: Hellas (Greece).
Registered: 2006-06-05
Posts: 566

Weird wireless issue on local network only

In my home network I have an rtl8188ee pci express wifi card. When downloading something over the internet it can easily max out my ISPs speed. But when transferring a file from another computer to the same wireless network the speed is around 400 kbps. If I use another usb wireless card the local speeds are fine.

What kind of issue could cause such a performance issue on a local network?

02:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8188EE Wireless Network Adapter [10ec:8179] (rev 01)
        Subsystem: Realtek Semiconductor Co., Ltd. Device [10ec:8197]
        Kernel driver in use: rtl8188ee
        Kernel modules: rtl8188ee

Γίνε ρεαλιστής, μείνε ονειροπόλος ...

Offline

#2 2025-08-15 12:52:02

seth
Member
From: Don't DM me only for attention
Registered: 2012-09-03
Posts: 69,056

Re: Weird wireless issue on local network only

Just to be sure, your ISP speed ain't 64kbit/s, right? tongue

What is "another computer"? I guess the same LAN segment?
Also WiFi?
(it's it's close by, radio interference might become a problem where the usb dongle might just be on the other side of the EM shielding case)

Or is it an ad-hoc connection?

Generally monitor the signal quality during interwebz and local traffic.
If the gods really hate you and the "other computer" is a bit slower, you might just run into a situation where the chip enters power saving all the time while waiting for more data - you could try to keep it alive by constantly "ping _gateway" in the background or so.

Offline

#3 2025-08-16 08:42:25

firewalker
Member
From: Hellas (Greece).
Registered: 2006-06-05
Posts: 566

Re: Weird wireless issue on local network only

The topology is just an ADLS MODEM-router with a WiFi AP and two computers at a distance of about two meters from the AP and between them. Even ping doesn't work properly when transferring a file. 2500+ ms to the AP or the other computer.I tried to disable aspm (sleep) and some other options, but no luck.

cat /etc/modprobe.d/rtl8188ee.conf

options rtl8188ee ips=0 swlps=0 fwlps=0 aspm=0

I also tried with a different brand of ADSL MODEM-router. Same issue.

Just using a 4 € USB WiFi  (rt88_usb driver) and it works just fine.

I guess the rtl8188ee pci express driver has some incompatibility issue? I might report upstream.


Γίνε ρεαλιστής, μείνε ονειροπόλος ...

Offline

#4 2025-08-16 11:51:16

seth
Member
From: Don't DM me only for attention
Registered: 2012-09-03
Posts: 69,056

Re: Weird wireless issue on local network only

You're not looking at a problem w/ the device itself or some driver if the performance is strictly dictated by the other host.
At 2m distance, can you connect the other host with a cat6 cable and see whether that impacts the file transfer performance?
When transferring a huge file over the LAN, can you test the remaining WAN performance of both systems (ie. which one actually faces overall throughput issues/where the slowness is coming from)?

Offline

Board footer

Powered by FluxBB