Bluetooth stops working on Raspberry Pi 4 with bluez 5.55-0ubuntu1.1

[hujq]

Bluetooth stops working after updating to bluez version 5.55-0ubuntu1.1. /usr/bin/btuart returns "bcm43xx_init Initialization timed out". Bluetooth is working again if bluez is reverted to version 5.55-0ubuntu1. I don't have any unusual setup like miniuart-bt.

Release: 20.10
bluez:
  Installed: 5.55-0ubuntu1.1
  Candidate: 5.55-0ubuntu1.1
  Version table:
 *** 5.55-0ubuntu1.1 500
        500 http://ports.ubuntu.com/ubuntu-ports groovy-updates/main arm64 Packages
        100 /var/lib/dpkg/status
     5.55-0ubuntu1 500
        500 http://ports.ubuntu.com/ubuntu-ports groovy/main arm64 Packages

ProblemType: Bug
DistroRelease: Ubuntu 20.10
Package: bluez 5.55-0ubuntu1.1
ProcVersionSignature: Ubuntu 5.8.0-1007.10-raspi 5.8.14
Uname: Linux 5.8.0-1007-raspi aarch64
ApportVersion: 2.20.11-0ubuntu50.2
Architecture: arm64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Wed Nov 25 16:09:03 2020
ImageMediaBuild: 20200423.1
InterestingModules: bnep bluetooth
Lspci-vt: -[0000:00]---00.0-[01]----00.0 VIA Technologies, Inc. VL805 USB 3.0 Host Controller
Lsusb:
 Bus 002 Device 002: ID 1058:25ee Western Digital Technologies, Inc. My Book 25EE
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 002: ID 2109:3431 VIA Labs, Inc. Hub
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Lsusb-t:
 /: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 5000M
     |__ Port 2: Dev 2, If 0, Class=Mass Storage, Driver=usb-storage, 5000M
 /: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/1p, 480M
     |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M
ProcKernelCmdLine: coherent_pool=1M 8250.nr_uarts=0 snd_bcm2835.enable_compat_alsa=0 snd_bcm2835.enable_hdmi=1 snd_bcm2835.enable_headphones=1 video=HDMI-A-1:1920x1080M@60 smsc95xx.macaddr=DC:A6:32:B9:18:CC vc_mem.mem_base=0x3eb00000 vc_mem.mem_size=0x3ff00000 dwc_otg.lpm_enable=0 console=tty1 root=PARTUUID=5f9d0997-1b4e-423b-ad5e-8bce1a7e1ae4 rootfstype=ext4 elevator=deadline rootwait fixrtc
SourcePackage: bluez
UpgradeStatus: Upgraded to groovy on 2020-10-23 (33 days ago)
acpidump:

hciconfig:

rfkill:
 0: phy0: Wireless LAN
  Soft blocked: no
  Hard blocked: no

[Sebastien Bacher (seb128)]

Thank you for your bug report. It's probably an issue we want sorted out before accepting the update in hirsute so let's tag it block-proposed

[Hedda Frauk (heddi98)]

Because of Bluetooth, my system hangs frequently and inputs are no longer possible. Maybe the Xorg log could help?

[Daniel van Vugt (vanvugt)]

"Because of Bluetooth" sounds like a stretch. Hedda, please open a new bug by running:

  ubuntu-bug gnome-shell

so we can analyse your issue separately.

[Sebastien Bacher (seb128)]

Removing block-proposed, the idea was to deal with the regression but that's not happening and we need to land the hirsute update anyway now that we are past feature freeze

[Brian Murray (brian-murray)]

The Groovy Gorilla has reached end of life, so this bug will not be fixed for that release

[William Wilson (jawn-smith)]

This was fixed previously in hirsute by an upstream merge that resulted in bluez 5.56-0ubuntu1