2.4GHz slow or bad on wrt1900ac v1

Bought the router very cheap , just for a dumb AP.

But wrt1900ac on 2.4GHz seems buggy with openwrts wifi driver .
(All tests done at same location, two sheetrock walls away, at night.
with multiple android devices and laptops, and a usb dongle on a desktop)

Stock linksys firmware performed as expected .
50 - 70 Mbps on 2.4GHz (and even 120-130 on one usb dongle, didnt think that possible on 2.4)
120-170 Mbps on 5GHz (few devices a bit slower, but they are always slower)

On 19.07.8 2.4 GHZ was very bad, to no connection at all.
2 - 4 Mbps on 2.4 GHz very flaky
50 - 150 Mbps on 5Ghz seemed ok .
did not test for to long and went back to stock Linksys firmware to test.

On 20.02.0 Situation is better then 19.07.08
15 - 30 MBps average on 2.4GHz ( few times as high as 65 but very rare)
but also slower then 10MBps sometimes , so all over the slower end of the spectrum.
150 - 230 MBps on 5GHz better then any other tests (maxing out the broadband)

Wondering if this is the norm with opensource driver for this wifi chip?

It would be a shame to go back to linksys firmware as i like to run
wifi on a vlan on a trunk to APs and keep management separate
and other vlans to ports if location needs it .
Plus all other unwanted services linksys firmware runs and keeps ports open.
Except maybe not in bridge mode.

thanx

mamba as an AP, maybe try replacing the 2 radios.

If that is the case. Maybe a mention on the device page, of the incomplete wifi support?
Marvell Wifi page mentions some bugs but not this particular one for 2.4 GHz.
Device page makes it seem like its full support .

Same goes for e4200v2-ea4500 , wifi works , but not when it comes to power saving
wifi on android devices , pings get horrible 10-20 sec .
Where same androids on other devices do just fine , even on wrt54gs.

@dandik I have a WRT1900ACv1, in addition to a WRT1900ACS and WRT3200ACM. Have run both 19.07.8 and 20.02.0 and don't observe the same symptoms.

Have you considered there may have been a reason the unit was as "cheap" as it was?

I did consider the price, which is why i bought it , to not feel bad if it does not work out !
And just to have another device for testing . But that is another issue.

The main issue is that under linksys firmware it performs just fine, which tells me there is no
hardware problems with the device itself . Just a driver issue under openwrt
( opensource driver that is )
And yes i have read about initial quorums with linksys touting this as an open source compatible
platform from get go , but not providing much support for opening up the drivers for the chipsets.

So you are saying in you experience 2.4GHz on WRT1900ACv1 with openwrt runs
wifi at full speed 50-60-75 MBps ??? or that it just works ?

thanx

I have a mamba running master and it is, as it always has been, acceptable, but not special, 2.4 @ ~144Mbps wiith client in same room.. mwlwifi has always had a problem with some clients. IMO no mwlwifi device is going to make for a good choice as an AP, turn the radios off and they are a great router (pipe dependent).

For a basic low power router/firewall i have a perfectly semi/wifi-crippled e4200-ea4500
Have older kyocera phone for voip that will not connect to it, or buggy powersave with other androids.
Or for a full blown firewall a slim intel i5 with multiple nics . And multitude of of Dumb APs for various
clients and scenarios. But it is mainly because openwrt is buggy with wifi on all of my routers.

But as a long time (satisfied)user of openwrt i am starting to wonder why , there is no clear cut
documentation on what is 100%/95%/90% supported , and what is less so.
There sould be a simple device list with checkmarks on what works,sort of works,and baerly.

As a reference , very clear info on what works and what doesnt on which device.

I can vouch for for wrt54g and wrt54gs is the only one of my routers that seem 100%.
But being old devices with 4/16 and 8/32 they need custom compiles to work .

thanx