我使用的是 HP ENVY 笔记本电脑 17m-cg0xxx，AX201芯片。正如标题所说，我的蓝牙范围太弱了。太弱了，距离笔记本电脑只有大约 5 到 6 厘米。
我尝试了各种方法，从将内核更新到 6.5.0-17-generic，到直接从Linux 内核档案.并将 ibt* 和 iwl* 固件文件分别复制到 /lib/firmware 和 /lib/firmware/intel。
所以我想知道是否有人能解决这个问题。也许是针对此特定芯片的特定固件版本。
我看到过类似的问题，但都是关于 wifi 的。我的 wifi 运行正常。
结果dmesg | grep Blue：
[ 4.047792] Bluetooth: Core ver 2.22
[ 4.048107] Bluetooth: HCI device and connection manager initialized
[ 4.048112] Bluetooth: HCI socket layer initialized
[ 4.048114] Bluetooth: L2CAP socket layer initialized
[ 4.048118] Bluetooth: SCO socket layer initialized
[ 4.076124] Bluetooth: hci0: Bootloader revision 0.4 build 0 week 11 2017
[ 4.077132] Bluetooth: hci0: Device revision is 2
[ 4.077135] Bluetooth: hci0: Secure boot is enabled
[ 4.077136] Bluetooth: hci0: OTP lock is enabled
[ 4.077138] Bluetooth: hci0: API lock is enabled
[ 4.077139] Bluetooth: hci0: Debug lock is disabled
[ 4.077140] Bluetooth: hci0: Minimum firmware build 1 week 10 2014
[ 4.084536] Bluetooth: hci0: Found device firmware: intel/ibt-19-32-4.sfi
[ 4.084648] Bluetooth: hci0: Boot Address: 0x24800
[ 4.084650] Bluetooth: hci0: Firmware Version: 249-27.23
[ 5.732399] Bluetooth: hci0: Waiting for firmware download to complete
[ 5.733123] Bluetooth: hci0: Firmware loaded in 1609942 usecs
[ 5.733166] Bluetooth: hci0: Waiting for device to boot
[ 5.748285] Bluetooth: hci0: Device booted in 14791 usecs
[ 5.748363] Bluetooth: hci0: Malformed MSFT vendor event: 0x02
[ 5.752419] Bluetooth: hci0: Found Intel DDC parameters: intel/ibt-19-32-4.ddc
[ 5.754277] Bluetooth: hci0: Applying Intel DDC parameters completed
[ 5.755234] Bluetooth: hci0: Firmware revision 0.4 build 249 week 27 2023
[ 5.757233] Bluetooth: hci0: HCI LE Coded PHY feature bit is set, but its usage is not supported.
[ 8.002017] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 8.002022] Bluetooth: BNEP filters: protocol multicast
[ 8.002027] Bluetooth: BNEP socket layer initialized
[ 8.003439] Bluetooth: MGMT ver 1.22
[ 8.127164] Bluetooth: hci0: Bad flag given (0x1) vs supported (0x0)
[ 20.430166] Bluetooth: RFCOMM TTY layer initialized
[ 20.430176] Bluetooth: RFCOMM socket layer initialized
[ 20.430183] Bluetooth: RFCOMM ver 1.11
的结果 sudo systemctl status bluetooth.service
● bluetooth.service - Bluetooth service
Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor preset: enabled)
Active: active (running) since Thu 2024-02-08 17:26:20 CST; 1h 2min ago
Docs: man:bluetoothd(8)
Main PID: 648 (bluetoothd)
Status: "Running"
Tasks: 1 (limit: 13910)
Memory: 2.4M
CPU: 572ms
CGroup: /system.slice/bluetooth.service
└─648 /usr/lib/bluetooth/bluetoothd
Feb 08 18:28:01 jose-HP-ENVY-Laptop-17m-cg0xxx bluetoothd[648]: Endpoint registered: sender=:1.83 path=/MediaEndpoint/A2DPSource/sbc_xq_512
Feb 08 18:28:01 jose-HP-ENVY-Laptop-17m-cg0xxx bluetoothd[648]: Endpoint registered: sender=:1.83 path=/MediaEndpoint/A2DPSink/sbc_xq_552
Feb 08 18:28:01 jose-HP-ENVY-Laptop-17m-cg0xxx bluetoothd[648]: Endpoint registered: sender=:1.83 path=/MediaEndpoint/A2DPSource/sbc_xq_552
Feb 08 18:28:01 jose-HP-ENVY-Laptop-17m-cg0xxx bluetoothd[648]: Endpoint registered: sender=:1.292 path=/org/bluez/hci0/A2DP/LDAC/Source/2
Feb 08 18:28:01 jose-HP-ENVY-Laptop-17m-cg0xxx bluetoothd[648]: Endpoint registered: sender=:1.292 path=/org/bluez/hci0/A2DP/SBC/Source/1
Feb 08 18:28:01 jose-HP-ENVY-Laptop-17m-cg0xxx bluetoothd[648]: Endpoint registered: sender=:1.292 path=/org/bluez/hci0/A2DP/SBC/Source/2
Feb 08 18:28:01 jose-HP-ENVY-Laptop-17m-cg0xxx bluetoothd[648]: src/device.c:set_wake_allowed_complete() Set device flags return status: Invalid Parameters
Feb 08 18:28:10 jose-HP-ENVY-Laptop-17m-cg0xxx bluetoothd[648]: src/profile.c:connect_io() Unable to connect Hands-Free Voice gateway: connect to 20:64:DE:78:74:E1: Device or resource busy (16)
Feb 08 18:28:10 jose-HP-ENVY-Laptop-17m-cg0xxx bluetoothd[648]: src/profile.c:record_cb() Connecting Hands-Free Voice gateway failed: Input/output error
Feb 08 18:28:14 jose-HP-ENVY-Laptop-17m-cg0xxx bluetoothd[648]: /org/bluez/hci0/dev_20_64_DE_78_74_E1/sep1/fd5: fd(43) ready
答案1
您所能做的就是在终端中更改 iwlwifi 模块的 bt_coex_active 设置
echo "options iwlwifi bt_coex_active=0" | sudo tee /etc/modprobe.d/iwlbt.conf如果 2.4GHz 上有很多活动，这可能甚至没有帮助