Can anybody sum up what the deal is with the kernel on Slate AX?
And any idea how likely it is to ever have mainline OpenWRT support?
Somebody here (@solidus1983) is working on it, but I don’t know that there is a high degree of confidence at the moment that the platform will be solid in the near term.
You can build a kind of stock OpenWrt version with the gl-infra-builder using the qsdk kernel which is more stable than the stock firmware (in my experience) but that has its own issues.
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I did a little more looking around and found mention of beta firmware images with kernel 5.4, starting at reply 28: GL-AXT1800 (Slate AX): Wireguard client connect error (REKEY TIMEOUT) - #28 by alzhao
The 5.4 is also a qsdk kernel. It’s very temperamental to compile, and the performance is worse by about a third compared to the 4.4 qsdk - which is why everyone I’ve seen is still using the older kernel.
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I feel slightly 
about the future prospects due to this, but the performance with the stock GLi firmware is so good … just hope it’ll eventually be well supported in mainline OpenWRT, even without DFS
Leaving this here as a pointer to a more recent thread: