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Martin Hope
kart-able
Asked: 2022-03-20 01:46:10 +0800 CST
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我在使用内核 5.15.28-1 的 Manjaro

我的问题与蓝牙有关。我有 bluez 5.61-1（我从 5.63-2 降级）。

我可以使用 systemctl 激活蓝牙，但不能从我编写的 systemd 服务激活：

#/etc/systemd/system/bt-restart.service

 [Unit]
 Description=restart bt and connect keypad

 [Service]
 Type=oneshot
 User=root

 RemainAfterExit=yes

 ExecStart=/usr/bin/sleep 1
 ExecStart=-/usr/lib/systemd/system/bluetooth
 ExecStart=/usr/bin/sleep 3
 ExecStart=/home/jcw/bin/enable-bt.sh

 [Install]
 WantedBy=multi-user.target

输出自

sudo systemctl status bt-restart

● bt-restart.service - restart bt and connect keypad
     Loaded: loaded (/etc/systemd/system/bt-restart.service; enabled; vendor preset: disabled)
     Active: active (exited) since Sat 2022-03-19 09:00:35 CET; 1h 27min ago
    Process: 2762 ExecStart=/usr/bin/sleep 1 (code=exited, status=0/SUCCESS)
    Process: 2763 ExecStart=/usr/lib/systemd/system/bluetooth (code=exited, status=0/SUCCESS)
    Process: 2764 ExecStart=/usr/bin/sleep 3 (code=exited, status=0/SUCCESS)
    Process: 2766 ExecStart=/home/jcw/bin/enable-bt.sh (code=exited, status=0/SUCCESS)
   Main PID: 2766 (code=exited, status=0/SUCCESS)
        CPU: 41ms

mars 19 08:59:50 jcw-k30amjafk31amj systemd[1]: Starting restart bt and connect keypad...
mars 19 08:59:51 jcw-k30amjafk31amj systemd[2763]: bt-restart.service: Executable /usr/lib/systemd/system/bluetooth missing,>
mars 19 09:00:35 jcw-k30amjafk31amj enable-bt.sh[2767]: Attempting to connect to 2B:24:13:DB:7C:99
mars 19 09:00:35 jcw-k30amjafk31amj enable-bt.sh[2767]: Failed to connect: org.bluez.Error.Failed
mars 19 09:00:35 jcw-k30amjafk31amj systemd[1]: Finished restart bt and connect keypad.

从Executable /usr/lib/systemd/system/bluetooth missing可以看出，systemd 没有找到 bluetooth.service。

但该文件存在。可以通过 systemctl 访问。所以呢？

编辑：第二行的结尾是“缺少可执行文件/usr/lib/systemd/system/bluetooth，跳过：没有这样的文件或目录”

systemd bluetooth