Ubuntu25.10蓝牙Wifi不可用的解决过程
作者：ZGUIZ
本文作者分享了解决古董笔记本安装Ubuntu25.10后,蓝牙和WiFi无法正常启动的问题的过程,详细记录了查找、下载、加载固件及驱动签名注册等步骤
前阵子把自己的古董笔记本安装上了Ubuntu 25.10，结果蓝牙和wifi无法正常启动。
作为一个Linux新手，折腾现在才解决，记录一下我解决的流程。
蓝牙无法启动
1）按照教程安装了bluez。
sudo apt update sudo apt install bluez
结果蓝牙还是无法启动
2）通过命令查询蓝牙状态：
$ hciconfig -a hci0: Type: Primary Bus: USB BD Address: XX:XX:XX:XX:XX ACL MTU: 0:0 SCO MTU: 0:0 DOWN RX bytes:676 acl:0 sco:0 events:18 errors:0 TX bytes:57 acl:0 sco:0 commands:19 errors:0 Features: 0xxz 0xxx 0xxx 0xxx 0xxx 0xxx 0xxx 0xxx Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3 Link policy: Link mode: PERIPHERAL ACCEPT
可以看到蓝牙是DOWN的状态
3）尝试启动蓝牙
$ sudo hciconfig hci0 up Can't init device hci0: Connection timed out (110)
看到蓝牙启动异常
4）打印启动日志
$ sudo dmesg | grep -i bluetooth [ 4.724382] Bluetooth: Core ver 2.22 [ 4.724432] NET: Registered PF_BLUETOOTH protocol family [ 4.724436] Bluetooth: HCI device and connection manager initialized [ 4.724443] Bluetooth: HCI socket layer initialized [ 4.724447] Bluetooth: L2CAP socket layer initialized [ 4.724456] Bluetooth: SCO socket layer initialized [ 6.060376] Bluetooth: hci0: BCM: chip id 70 [ 6.061375] Bluetooth: hci0: BCM: features 0x06 [ 6.077294] Bluetooth: hci0: BCM43142A [ 6.077304] Bluetooth: hci0: BCM43142A0 (001.001.011) build 0000 [ 6.143709] Bluetooth: hci0: BCM: firmware Patch file not found, tried: [ 6.143726] Bluetooth: hci0: BCM: 'brcm/BCM43142A0-04ca-2009.hcd' [ 6.143729] Bluetooth: hci0: BCM: 'brcm/BCM-04ca-2009.hcd' [ 8.210327] Bluetooth: hci0: command 0x1003 tx timeout [ 8.210329] Bluetooth: hci0: Opcode 0x1003 failed: -110 [ 8.607318] Bluetooth: BNEP (Ethernet Emulation) ver 1.3 [ 8.607328] Bluetooth: BNEP filters: protocol multicast [ 8.607337] Bluetooth: BNEP socket layer initialized [ 75.241504] Bluetooth: hci0: unexpected event for opcode 0x1003 [ 85.606015] Bluetooth: hci0: BCM: Reset failed (-110) [ 222.432794] Bluetooth: hci0: BCM: chip id 70 [ 222.433875] Bluetooth: hci0: BCM: features 0x06 [ 222.449797] Bluetooth: hci0: BCM43142A [ 222.449817] Bluetooth: hci0: BCM43142A0 (001.001.011) build 0000 [ 222.451067] Bluetooth: hci0: BCM: firmware Patch file not found, tried: [ 222.451080] Bluetooth: hci0: BCM: 'brcm/BCM43142A0-04ca-2009.hcd' [ 222.451085] Bluetooth: hci0: BCM: 'brcm/BCM-04ca-2009.hcd' [ 224.519245] Bluetooth: hci0: command 0x1003 tx timeout [ 224.519259] Bluetooth: hci0: Opcode 0x1003 failed: -110 [ 317.362894] Bluetooth: hci0: unexpected event for opcode 0x1003 [ 327.766613] Bluetooth: hci0: BCM: Reset failed (-110) [ 330.423732] Bluetooth: hci0: BCM: chip id 70 [ 330.424724] Bluetooth: hci0: BCM: features 0x06 [ 330.440745] Bluetooth: hci0: BCM43142A [ 330.440751] Bluetooth: hci0: BCM43142A0 (001.001.011) build 0000 [ 330.441774] Bluetooth: hci0: BCM: firmware Patch file not found, tried: [ 330.441778] Bluetooth: hci0: BCM: 'brcm/BCM43142A0-04ca-2009.hcd' [ 330.441779] Bluetooth: hci0: BCM: 'brcm/BCM-04ca-2009.hcd' [ 332.502288] Bluetooth: hci0: Opcode 0x1003 failed: -110 [ 332.503731] Bluetooth: hci0: unexpected event for opcode 0x1003 [ 342.613887] Bluetooth: hci0: BCM: Reset failed (-110) [ 478.173127] Bluetooth: hci0: BCM: chip id 70 [ 478.174082] Bluetooth: hci0: BCM: features 0x06 [ 478.190134] Bluetooth: hci0: BCM43142A [ 478.190151] Bluetooth: hci0: BCM43142A0 (001.001.011) build 0000 [ 478.191239] Bluetooth: hci0: BCM: firmware Patch file not found, tried: [ 478.191254] Bluetooth: hci0: BCM: 'brcm/BCM43142A0-04ca-2009.hcd' [ 478.191260] Bluetooth: hci0: BCM: 'brcm/BCM-04ca-2009.hcd' [ 480.210701] Bluetooth: hci0: Opcode 0x1003 failed: -110
可以看到，启动时缺少了BCM43142A0-04ca-2009.hcd这个固件
5）我们可以到github的winterheart/broadcom-bt-firmware项目仓库下载，并找到brcm目录下的BCM43142A0-04ca-2009.hcd
6）将下载的固件放到指定目录
sudo cp BCM43142A0-04ca-2009.hcd /lib/firmware/brcm/BCM43142A0-04ca-2009.hcd
7） 移除并重新加载蓝牙驱动
sudo modprobe -r btusb sudo modprobe btusb sudo hciconfig hci0 up
这样就可以看到蓝牙正常启动了。
Wifi无法启动
1）查看网络硬件状态
sudo lshw -C network
*-network UNCLAIMED
description: Ethernet controller
product: RTL8111/8168/8211/8411 PCI Express Gigabit Ethernet Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0.1
bus info: pci@0000:07:00.1
version: 12
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list
configuration: latency=0
resources: ioport:3000(size=256) memory:d1504000-d1504fff memory:d1500000-d1503fff
*-network UNCLAIMED
description: Network controller
product: BCM43142 802.11b/g/n
vendor: Broadcom Inc. and subsidiaries
physical id: 0
bus info: pci@0000:08:00.0
version: 01
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress cap_list
configuration: latency=0
resources: memory:d1400000-d1407fff可以看到，网卡处于UNCLAIMED状态，意味着没有驱动
2）安装驱动
sudo apt install broadcom-sta-dkms
3）手动加载驱动
sudo modprobe wl modprobe: ERROR: could not insert 'wl': Key was rejected by service
根据控制台显示的结果，查询到这个问题是因为由于安全启动的保护机制，UEFI 安全启动（Secure Boot）功能阻止了驱动加载
4）为驱动签名并注册MOK
1.导入系统生成的密钥：
sudo mokutil --import /var/lib/shim-signed/mok/MOK.der
之后系统会要求你输入一个秘密，记住这个密码
2. 重启电脑：
sudo reboot
3. 电脑重启过程中，屏幕上会出现一个蓝色的 "Perform MOK management" 界面。需要按顺序执行以下步骤：
- 按任意键进入管理界面。
- 选择 "Enroll MOK"。
- 选择 "Continue"。
- 选择 "Yes"。
- 输入你在上一步设置的临时密码。
- 最后选择 "Reboot" 重启。
- 重启后Wifi正常可用
总结
以上为个人经验，希望能给大家一个参考，也希望大家多多支持脚本之家。