I just tried to Flash the Linksys MR9000 with EA8300 firmware 10.07.3 and .4
Must report doesn't work as the router never connects ethernet cable to hand out an IP address via DHCP, workstation always says cable disconnected.
Fortunately, I can always boot back to fail over partition, so bricking is temporary and the unworkable OpenWRT partition can also be overwritten back to Linksys OEM firmware.
Any thoughts on getting this working ?
Thank you for your input !
Just for info: MR9000 hardware specs
Sadly none other than the general answer to this question:
https://openwrt.org/faq/how_can_i_add_support_for_a_new_device
Compiling an image is above my pay grade 
HW is almost same except WI2 radio chip is QCA9884 4x4 MIMO and not QCA9886 2X2 MIMO, I have a hunch the 9886 driver crashes the router. No info on Power Amp, but I don't think the PA in the issue.
Any way to obtain an EA8300 factory without the QCA9886 driver (for manual reinstall of 9884) or replacing the 9886 with the 9884 instead ?
Can someone in the community assist me with this ?
I assume the assembly of a test image should be possible quite easily with the Image Builder.
I'll buy another one and see what happens. Seems there is quite a bit of folks wanting to see this working as well.
I also tried loading 19.07.4 EA8300 build on it. I agree the ethernet switch doesn't work. But the 2.4G and one of the 5G (ch 36-64) works. The other wifi likely just needs the 9884 driver included in the build.
Here is the boot log:
[ 1.345687] ar40xx c000000.ess-switch: Probe failed - Missing PHYs!
Maybe this is relevant: [QCA8072] cannot initialize ess-switch
Including the 9884 driver did not magically fix anything or make the 3rd wifi work. 
Are we still interested in getting a version for this? I apologize for my delay in response, I am currently forward right now and so I am not exactly at home to try these things out. If so let me know, I can go ahead and get started again with research and trying a few things.
I'm still interested. I've got one and can help test things..
Signed up so I could comment: Very interested! This device is outstanding. The stock firmware is atrocious, not a lot of options. I'll be keeping an eye on this thread, appreciate all the hard work.
Definitely interested. Just purchased a Linksys MR9000. I had a Netgear Nighthawk 8500 that I've been running with tomato for about 3 years. Hoping I can get OpenWRT for the MR9000 sometime. I'd be able to test if someone has the know-how to develop.
I'm looking for MR9000 firmware. Just bought one and would really like to use a better interface that the OEM.
Although the router is excellent, advanced settings don't work. Tech support is useless. We really need a cfw for this one. Setting dns to my pi-hole on a seperate laptop running linux (connected to the router's wireless) eventually knocked it offline after taking forever to load. I had to reconfigure the pi-hole to my c7's wireless then added that dns to this linksys router to get it stable again (My setup is modem -> c7/openwrt -> linksys).
This firmware is next to useless. More issues have been found, all have been reported to linksys:
I am back and I have in hand a MR9000 again. So it's looking like driver fixes that need to be addressed so far....
Any news? Would be very interested in having the MR9000 supported ... could also help with testing.
Sadly no. Still trying to figure out what the switch and the 3rd radio is. I haven't mess with this in a a few months.
Thanks for trying, don't sweat it. I gave mine away and picked up an ea8300. It's a piece of junk, too, even on 21.02 release candidate.
Considering the EA8300 is a very decent stable router, looks like one more troll comment...
It's not that it is a piece of junk, it's simply that software wasn't written for it's switch and 3rd radio is all.
