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malat
Asked: 2018-10-01 23:33:06 +0800 CST

从命令行显示`/proc/acpi/battery/BAT0/info`

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在 MacBookPro10,1 上全新安装 Debian/stable 9.5 时，我试图从命令行显示 acpi 信息。

这是我看到的：

$ find /proc/acpi/
/proc/acpi/
/proc/acpi/button
/proc/acpi/button/lid
/proc/acpi/button/lid/LID0
/proc/acpi/button/lid/LID0/state
/proc/acpi/wakeup

但acpi似乎还是看到了电池：

$ acpi -V
Battery 0: Discharging, 46%, 01:17:56 remaining
Battery 0: design capacity 8460 mAh, last full capacity 7415 mAh = 87%
Adapter 0: off-line
Cooling 0: Processor 0 of 17
Cooling 1: Processor 0 of 17
Cooling 2: Processor 0 of 17
Cooling 3: BAT0 no state information available
Cooling 4: Processor 0 of 17
Cooling 5: intel_powerclamp no state information available
Cooling 6: Processor 0 of 17
Cooling 7: Processor 0 of 17
Cooling 8: Processor 0 of 17
Cooling 9: x86_pkg_temp no state information available
Cooling 10: Processor 0 of 17

/proc/acpi为了从界面获取正确的电池信息，我在安装过程中遗漏了什么？

linux debian

1 个回答

  1. Best Answer

    acpi查看在我的 Ubuntu 上执行的系统调用：

    ~ strace -e open,chdir acpi
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
chdir("/sys/class")                     = 0
chdir("power_supply")                   = 0
open(".", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3
open("BAT0/current_now", O_RDONLY)      = -1 ENOENT (No such file or directory)
open("BAT0/power_now", O_RDONLY)        = 4
open("BAT0/charge_now", O_RDONLY)       = -1 ENOENT (No such file or directory)
open("BAT0/energy_now", O_RDONLY)       = 4
open("BAT0/voltage_now", O_RDONLY)      = 4
...

    所以它似乎是从/sys/class/power_supply/*.

    由于该功能是在 Debian 内核中提供的，/sys/class/power_supply/*并且是在没有 Debian 内核的情况下构建的CONFIG_ACPI_PROCFS_POWER：

    $ grep CONFIG_ACPI_PROCFS_POWER /boot/config-$(uname -r)
# CONFIG_ACPI_PROCFS_POWER is not set

    你不会再看到任何东西/proc/acpi/battery/*

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