Realtek RTL8723BE throttling network speed

Realtek RTL8723BE throttling network speed

[Pratyush Yadav]

Hi,

I have the Realtek RTL8723BE wireless network adapter on my laptop:

  $ lspci | grep -i wireless
  08:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter

running kernel version "5.9.10-arch1-1".

I am seeing some strange behavior on it for some time now. When I power 
on my router and connect to it, I get the full download speed for about 
an hour or so. After that the speed throttles to around 60-70 KB/s. 
Other devices connected to the router continue work at full speed.

If I power cycle the router, it again works at full speed for about an 
hour or two and then throttles back to around 60-70 KB/s.

Has anybody ever seen any problem like this? Any fixes for this? Or at 
least any pointers to where I can start looking in the driver source?

Any help would be appreciated because this is quite annoying having to 
restart the router every hour or so.

-- 
Regards,
Pratyush Yadav

Re: Realtek RTL8723BE throttling network speed

[Larry Finger]

On 12/3/20 5:31 AM, Pratyush Yadav wrote:
> Hi,
> 
> I have the Realtek RTL8723BE wireless network adapter on my laptop:
> 
>    $ lspci | grep -i wireless
>    08:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter
> 
> running kernel version "5.9.10-arch1-1".
> 
> I am seeing some strange behavior on it for some time now. When I power
> on my router and connect to it, I get the full download speed for about
> an hour or so. After that the speed throttles to around 60-70 KB/s.
> Other devices connected to the router continue work at full speed.
> 
> If I power cycle the router, it again works at full speed for about an
> hour or two and then throttles back to around 60-70 KB/s.
> 
> Has anybody ever seen any problem like this? Any fixes for this? Or at
> least any pointers to where I can start looking in the driver source?
> 
> Any help would be appreciated because this is quite annoying having to
> restart the router every hour or so.

What router and software version?

Does unloading/reloading rtl8723be fix the problem without resetting the router?

I tried the rtl8723be connecting to a Netgear WNDR4500. The starting 
speedtest.net speeds of 45 Mbps down and 12 Mbps up were maintained for 10 
hours. The up speed is the maximum for my broadband connection. The interface 
had 2 disconnects for reason 3, but it reconnected automatically.

Larry
-



+

Re: Realtek RTL8723BE throttling network speed

[Pratyush Yadav]

On 04/12/20 09:19PM, Larry Finger wrote:
> On 12/3/20 5:31 AM, Pratyush Yadav wrote:
> > Hi,
> > 
> > I have the Realtek RTL8723BE wireless network adapter on my laptop:
> > 
> >    $ lspci | grep -i wireless
> >    08:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter
> > 
> > running kernel version "5.9.10-arch1-1".
> > 
> > I am seeing some strange behavior on it for some time now. When I power
> > on my router and connect to it, I get the full download speed for about
> > an hour or so. After that the speed throttles to around 60-70 KB/s.
> > Other devices connected to the router continue work at full speed.
> > 
> > If I power cycle the router, it again works at full speed for about an
> > hour or two and then throttles back to around 60-70 KB/s.
> > 
> > Has anybody ever seen any problem like this? Any fixes for this? Or at
> > least any pointers to where I can start looking in the driver source?
> > 
> > Any help would be appreciated because this is quite annoying having to
> > restart the router every hour or so.
> 
> What router and software version?

It is from an obscure manufacturer called "SyroTech". I can't find any 
info on the software on the web or on the manual.
 
> Does unloading/reloading rtl8723be fix the problem without resetting the router?

No.
 
> I tried the rtl8723be connecting to a Netgear WNDR4500. The starting
> speedtest.net speeds of 45 Mbps down and 12 Mbps up were maintained for 10
> hours. The up speed is the maximum for my broadband connection. The
> interface had 2 disconnects for reason 3, but it reconnected automatically.

Turning off power saving in NetworkManager and loading rtl8723be with 
options "ips=0 swlps=0 fwlps=0" seems to have fixed the problem over a 
couple days of testing.
 
> Larry

-- 
Regards,
Pratyush Yadav