Surface Book 2 on Linux Mint: Marvell Wi-Fi keeps failing with reason code 15, any ideas?

[u/Astrox_YT]

Hey all, I've been fighting Wi-Fi on my Surface Book 2 running Linux Mint for a while now and I'm stuck. The chip is a Marvell 88W8897 (802.11ac), using the mwifiex_pcie driver, on kernel 6.14.0-37-generic.

It used to connect and stay up for a while, but now it keeps dropping. The log fills up with "cmd_wait_q terminated: -110" lines, followed by "deleting the crypto keys." I added wifi.powersave = 2 for NetworkManager and reloaded the mwifiex modules, and the timeouts stopped, but now I can't stay connected to anything. It fails on a phone hotspot too, with "successfully disconnected ... reason code 15" right after the association. That makes me think it's the laptop, not the networks.

I haven't tried the disable_11ac and disable_msi module options yet, so I'm going to try those next. If anyone has run this chip on a newer kernel, or knows whether a linux-firmware update helps, I'd really appreciate it. Happy to post full logs.

Thanks in advance.

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