Hello,
I have Xiaomi EBs Basic 2 earplugs. On 19.4, they work well. On 21RC1, they pair, but bluez only (tries to) connect to the serial port profile, and ignores the audio. I first noticed it on AHS, but it also happens on "normal" XFCE.
First machine, with AHS:
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System: Host: <filter> Kernel: 5.10.0-9-amd64 x86_64 bits: 64 compiler: N/A
parameters: BOOT_IMAGE=/boot/vmlinuz-5.10.0-9-amd64
root=UUID=<filter> ro quiet splash
Desktop: Xfce 4.16.0 tk: Gtk 3.24.24 info: xfce4-panel wm: xfwm4 dm: LightDM 1.26.0
Distro: MX-21_rc1_x64 Wildflower October 5 2021 base: Debian GNU/Linux 11 (bullseye)
Machine: Type: Laptop System: CHUWIInnovationAnd(ShenZhen) product: GemiBook Pro v: N/A
serial: <filter>
Mobo: N/A model: N/A serial: <filter> UEFI: American Megatrends
v: JXX-BI-14.1-W133GWR300-058-D date: 03/12/2021
Battery: ID-1: BAT0 charge: 38.0 Wh condition: 38.0/38.0 Wh (100%) volts: 8.7/N/A model: N/A
type: Unknown serial: <filter> status: Charging
CPU: Topology: Quad Core model: Intel Celeron J4125 bits: 64 type: MCP arch: Goldmont Plus
family: 6 model-id: 7A (122) stepping: 8 microcode: 1A L2 cache: 4096 KiB
flags: lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 15974
Speed: 1134 MHz min/max: 800/2700 MHz Core speeds (MHz): 1: 1422 2: 1550 3: 1462
4: 1522
Vulnerabilities: Type: itlb_multihit status: Not affected
Type: l1tf status: Not affected
Type: mds status: Not affected
Type: meltdown status: Not affected
Type: spec_store_bypass
mitigation: Speculative Store Bypass disabled via prctl and seccomp
Type: spectre_v1 mitigation: usercopy/swapgs barriers and __user pointer sanitization
Type: spectre_v2 mitigation: Enhanced IBRS, IBPB: conditional, RSB filling
Type: srbds status: Not affected
Type: tsx_async_abort status: Not affected
Graphics: Device-1: Intel GeminiLake [UHD Graphics 600] driver: i915 v: kernel bus ID: 00:02.0
chip ID: 8086:3185
Display: x11 server: X.Org 1.20.13 driver: modesetting unloaded: fbdev,vesa
resolution: 2160x1440~60Hz
OpenGL: renderer: Mesa Intel UHD Graphics 600 (GLK 2) v: 4.6 Mesa 21.2.2
direct render: Yes
Audio: Device-1: Intel Celeron/Pentium Silver Processor High Definition Audio
driver: snd_hda_intel v: kernel bus ID: 00:0e.0 chip ID: 8086:3198
Sound Server: ALSA v: k5.10.0-9-amd64
Network: Device-1: Intel Wi-Fi 6 AX200 driver: iwlwifi v: kernel port: f040 bus ID: 01:00.0
chip ID: 8086:2723
IF: wlan0 state: up mac: <filter>
Device-2: Realtek RTL8153 Gigabit Ethernet Adapter type: USB driver: r8152
bus ID: 2-1.3:5 chip ID: 0bda:8153 serial: <filter>
IF: eth0 state: down mac: <filter>
IF-ID-1: tun0 state: unknown speed: 10 Mbps duplex: full mac: N/A
Drives: Local Storage: total: 704.24 GiB used: 259.53 GiB (36.9%)
ID-1: /dev/sda vendor: Western Digital model: WDS500G2B0B-00YS70 size: 465.76 GiB
block size: physical: 512 B logical: 512 B speed: 6.0 Gb/s serial: <filter> rev: 30WD
scheme: GPT
ID-2: /dev/sdb vendor: Netac model: SSD 256GB size: 238.47 GiB block size:
physical: 512 B logical: 512 B speed: 6.0 Gb/s serial: <filter> rev: 0A0 scheme: GPT
Partition: ID-1: / raw size: 29.32 GiB size: 28.69 GiB (97.85%) used: 12.16 GiB (42.4%) fs: ext4
dev: /dev/sda5
ID-2: /home raw size: 292.54 GiB size: 286.95 GiB (98.09%) used: 247.18 GiB (86.1%)
fs: ext4 dev: /dev/sda7
ID-3: swap-1 size: 9.01 GiB used: 132.8 MiB (1.4%) fs: swap
swappiness: 15 (default 60) cache pressure: 100 (default) dev: /dev/sda8
Sensors: System Temperatures: cpu: 54.0 C mobo: N/A
Fan Speeds (RPM): N/A
Repos: No active apt repos in: /etc/apt/sources.list
Active apt repos in: /etc/apt/sources.list.d/brave-browser-release.list
1: deb [arch=amd64] https://brave-browser-apt-release.s3.brave.com/ bullseye main
Active apt repos in: /etc/apt/sources.list.d/debian-stable-updates.list
1: deb http://deb.debian.org/debian bullseye-updates main contrib non-free
Active apt repos in: /etc/apt/sources.list.d/debian.list
1: deb http://deb.debian.org/debian bullseye main contrib non-free
2: deb http://security.debian.org/debian-security bullseye-security main contrib non-free
Active apt repos in: /etc/apt/sources.list.d/google-chrome.list
1: deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main
Active apt repos in: /etc/apt/sources.list.d/mx.list
1: deb http://nl.mxrepo.com/mx/repo/ bullseye main non-free
2: deb http://nl.mxrepo.com/mx/repo/ bullseye ahs
Active apt repos in: /etc/apt/sources.list.d/signal-xenial-added-by-mxpi.list
1: deb [arch=amd64] https://updates.signal.org/desktop/apt xenial main
Active apt repos in: /etc/apt/sources.list.d/skype-stable.list
1: deb [arch=amd64] https://repo.skype.com/deb stable main
Active apt repos in: /etc/apt/sources.list.d/teams.list
1: deb [arch=amd64] https://packages.microsoft.com/repos/ms-teams stable main
Active apt repos in: /etc/apt/sources.list.d/vscode.list
1: deb [arch=amd64] https://packages.microsoft.com/repos/vscode stable main
Info: Processes: 309 Uptime: 19h 31m Memory: 11.51 GiB used: 4.78 GiB (41.5%)
Init: SysVinit v: 2.96 runlevel: 5 default: 5 Compilers: gcc: 10.2.1 alt: 10
Shell: quick-system-in running in: quick-system-in inxi: 3.0.36
Second machine, RC1-XFCE:
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System: Host: <filter> Kernel: 5.10.0-9-amd64 x86_64 bits: 64 compiler: N/A
parameters: BOOT_IMAGE=/boot/vmlinuz-5.10.0-9-amd64
root=UUID=<filter> ro quiet splash
Desktop: Xfce 4.16.0 tk: Gtk 3.24.24 info: xfce4-panel wm: xfwm4 dm: LightDM 1.26.0
Distro: MX-21_rc1_x64 Wildflower October 5 2021 base: Debian GNU/Linux 11 (bullseye)
Machine: Type: Laptop System: FUJITSU product: LIFEBOOK E544 v: 10601736654 serial: <filter>
Chassis: type: 10 v: LIFEBOOK E544 serial: <filter>
Mobo: FUJITSU model: FJNB281 v: F2 serial: <filter> UEFI [Legacy]: FUJITSU // Phoenix
v: Version 1.06 date: 03/12/2015
Battery: ID-1: CMB1 charge: 32.0 Wh condition: 32.0/48.6 Wh (66%) volts: 12.2/10.8
model: Fujitsu CP671396-01 type: Li-ion serial: <filter> status: Full
CPU: Topology: Dual Core model: Intel Core i3-4000M bits: 64 type: MT MCP arch: Haswell
family: 6 model-id: 3C (60) stepping: 3 microcode: 28 L2 cache: 3072 KiB
flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 19156
Speed: 889 MHz min/max: 800/2400 MHz Core speeds (MHz): 1: 798 2: 799 3: 823 4: 802
Vulnerabilities: Type: itlb_multihit status: KVM: VMX disabled
Type: l1tf mitigation: PTE Inversion; VMX: conditional cache flushes, SMT vulnerable
Type: mds mitigation: Clear CPU buffers; SMT vulnerable
Type: meltdown mitigation: PTI
Type: spec_store_bypass
mitigation: Speculative Store Bypass disabled via prctl and seccomp
Type: spectre_v1 mitigation: usercopy/swapgs barriers and __user pointer sanitization
Type: spectre_v2 mitigation: Full generic retpoline, IBPB: conditional, IBRS_FW,
STIBP: conditional, RSB filling
Type: srbds mitigation: Microcode
Type: tsx_async_abort status: Not affected
Graphics: Device-1: Intel 4th Gen Core Processor Integrated Graphics vendor: Fujitsu Limited.
driver: i915 v: kernel bus ID: 00:02.0 chip ID: 8086:0416
Display: x11 server: X.Org 1.20.11 driver: modesetting unloaded: fbdev,vesa
resolution: 1366x768~60Hz
OpenGL: renderer: Mesa DRI Intel HD Graphics 4600 (HSW GT2) v: 4.5 Mesa 20.3.5
compat-v: 3.0 direct render: Yes
Audio: Device-1: Intel Xeon E3-1200 v3/4th Gen Core Processor HD Audio
vendor: Fujitsu Limited. driver: snd_hda_intel v: kernel bus ID: 00:03.0
chip ID: 8086:0c0c
Device-2: Intel 8 Series/C220 Series High Definition Audio vendor: Fujitsu Limited.
driver: snd_hda_intel v: kernel bus ID: 00:1b.0 chip ID: 8086:8c20
Sound Server: ALSA v: k5.10.0-9-amd64
Network: Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet
vendor: Fujitsu Limited. driver: r8169 v: kernel port: 3000 bus ID: 02:00.0
chip ID: 10ec:8168
IF: eth0 state: down mac: <filter>
Device-2: Intel Wireless 7260 driver: iwlwifi v: kernel port: 3000 bus ID: 03:00.0
chip ID: 8086:08b1
IF: wlan0 state: up mac: <filter>
Drives: Local Storage: total: 119.24 GiB used: 79.06 GiB (66.3%)
ID-1: /dev/sda vendor: Samsung model: MZ7TE128HMGR-00004 size: 119.24 GiB block size:
physical: 512 B logical: 512 B speed: 6.0 Gb/s serial: <filter> rev: 300Q scheme: MBR
Partition: ID-1: / raw size: 17.93 GiB size: 17.48 GiB (97.49%) used: 6.57 GiB (37.6%) fs: ext4
dev: /dev/sda1
ID-2: /home raw size: 95.28 GiB size: 93.66 GiB (98.30%) used: 72.50 GiB (77.4%)
fs: ext4 dev: /dev/sda3
ID-3: swap-1 size: 2.00 GiB used: 0 KiB (0.0%) fs: swap swappiness: 15 (default 60)
cache pressure: 100 (default) dev: /dev/sda4
ID-4: swap-2 size: 4.03 GiB used: 0 KiB (0.0%) fs: swap swappiness: 15 (default 60)
cache pressure: 100 (default) dev: /dev/sda2
Sensors: System Temperatures: cpu: 51.0 C mobo: N/A
Fan Speeds (RPM): N/A
Repos: No active apt repos in: /etc/apt/sources.list
Active apt repos in: /etc/apt/sources.list.d/debian-stable-updates.list
1: deb http://deb.debian.org/debian bullseye-updates main contrib non-free
Active apt repos in: /etc/apt/sources.list.d/debian.list
1: deb http://deb.debian.org/debian bullseye main contrib non-free
2: deb http://security.debian.org/debian-security bullseye-security main contrib non-free
Active apt repos in: /etc/apt/sources.list.d/mx.list
1: deb http://nl.mxrepo.com/mx/repo/ bullseye main non-free
Info: Processes: 213 Uptime: 8m Memory: 7.67 GiB used: 625.0 MiB (8.0%) Init: SysVinit
v: 2.96 runlevel: 5 default: 5 Compilers: gcc: 10.2.1 alt: 10 Shell: quick-system-in
running in: quick-system-in inxi: 3.0.36
Device info from blueman:
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20:1B:88:04:D8:68
public
Mi True Wireless EBs Basic 2
Mi True Wireless EBs Basic 2
0x240418
0x0000
audio-card
yes
no
no
no
no
00001101-0000-1000-8000-00805f9b34fb Serial Port
00001108-0000-1000-8000-00805f9b34fb Headset
0000110b-0000-1000-8000-00805f9b34fb Audio Sink
0000110c-0000-1000-8000-00805f9b34fb Remote Control Target
0000110e-0000-1000-8000-00805f9b34fb Remote Control
0000111e-0000-1000-8000-00805f9b34fb Handsfree
00001200-0000-1000-8000-00805f9b34fb PnP Information
bluetooth:v005Dp223Bd0100
/org/bluez/hci0
This headset still works (and doesn't have the "Serial Port" profile):
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5C:FB:7C:0B:ED:2C
public
JBL TUNE600BTNC
JBL TUNE600BTNC
0x240404
0x0000
audio-card
yes
no
no
no
no
00001108-0000-1000-8000-00805f9b34fb Headset
0000110b-0000-1000-8000-00805f9b34fb Audio Sink
0000110c-0000-1000-8000-00805f9b34fb Remote Control Target
0000110e-0000-1000-8000-00805f9b34fb Remote Control
0000111e-0000-1000-8000-00805f9b34fb Handsfree
/org/bluez/hci0
As I wrote, both work well on 19.4, on different machines.