Bug#1136790: mt7921e: bluetooth is broken with "Bluetooth: hci0: Failed to send wmt func ctrl (-22)"

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From	Antonio Russo <aerusso@aerusso.net>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#1136790: mt7921e: bluetooth is broken with "Bluetooth: hci0: Failed to send wmt func ctrl (-22)"
Date	Sat, 16 May 2026 04:10:01 +0200
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Cross-posted to 2 groups.

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On 5/15/26 4:13 PM, Anton Shestakov wrote:
> https://lore.kernel.org/linux-bluetooth/5i35wmc4z7sz54jo5uj6ywext2enh4ik3oxmfmperqk2v5kc27@ppvm6oodzipn/
I dug into the follow-up to that bug, and there's a patch
that's been merged to bluetooth-next [1]. I'm not feeling
quite motivated right now to recompile and check that this
fixes the issue for me, but someone else might.

Best,
Antonio

[1] https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git/commit/?id=162b1adeb057d28ad84fd8a03f3c50cf08db5c62

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Thread

Bug#1136790: mt7921e: bluetooth is broken with "Bluetooth: hci0: Failed to send wmt func ctrl (-22)" Anton Shestakov <av6@dwimlabs.net> - 2026-05-16 00:20 +0200
  Bug#1136790: mt7921e: bluetooth is broken with "Bluetooth: hci0: Failed to send wmt func ctrl (-22)" Antonio Russo <aerusso@aerusso.net> - 2026-05-16 04:10 +0200
  Bug#1136790: mt7921e: bluetooth is broken with "Bluetooth: hci0: Failed to send wmt func ctrl (-22)" Steinar Bang <sb@dod.no> - 2026-05-16 10:40 +0200
  Bug#1136790: mt7921e: bluetooth is broken with "Bluetooth: hci0: Failed to send wmt func ctrl (-22)" Andreas Sundstrom <sunkan+debian.bugs@zappa.cx> - 2026-05-16 12:00 +0200
  Bug#1136790: Bluetooth stopped working with kernel 6.12.88 Stephan Verbücheln <verbuecheln@posteo.de> - 2026-05-18 21:00 +0200

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