我正在编写一个 python 脚本，需要知道何时插入电池。我用pyudev为了那个原因。
问题：
- 仅插入交流电源适配器即可开启笔记本电脑。
- 当我跑步时
ls /sys/class/power_supply/BAT0，回复是
到目前为止一切顺利ls: cannot access '/sys/class/power_supply/BAT0': No such file or directory - 但是当我插入电池然后执行相同的命令时，我得到相同的输出！检测到电池需要 20 秒。
- 我也尝试过
也需要20秒。udevadm monitor -u
预期行为：我希望它能被立即检测到。
当我插拔交流适配器（插入电池时），然后运行时，udevadm monitor -u它会立即检测交流适配器事件和迟到的电池事件。
系统信息
$ inxi --admin --verbosity=7 --filter --no-host --width
System:
Kernel: 6.1.38-1-MANJARO arch: x86_64 bits: 64 compiler: gcc v: 13.1.1
parameters: BOOT_IMAGE=/@/boot/vmlinuz-6.1-x86_64
root=UUID=d18277d5-35dd-426d-b08f-1698012272b1 rw rootflags=subvol=@
apparmor=1 security=apparmor udev.log_priority=3 fastboot
Desktop: KDE Plasma v: 5.27.6 tk: Qt v: 5.15.10 wm: kwin_x11 vt: 2 dm:
1: GDM v: 44.1 note: stopped 2: LightDM v: 1.32.0 note: stopped 3: SDDM
Distro: Manjaro Linux base: Arch Linux
Machine:
Type: Laptop System: Dell product: Inspiron 5558 v: N/A
serial: <superuser required> Chassis: type: 9 serial: <superuser required>
Mobo: Dell model: 086DKN v: A00 serial: <superuser required> UEFI: Dell
v: A18 date: 12/30/2019
Memory:
System RAM: total: 8 GiB available: 7.67 GiB used: 4.83 GiB (62.9%)
RAM Report: permissions: Unable to run dmidecode. Root privileges required.
CPU:
Info: model: Intel Core i7-5500U bits: 64 type: MT MCP arch: Broadwell
gen: core 5 level: v3 note: check built: 2015-18 process: Intel 14nm
family: 6 model-id: 0x3D (61) stepping: 4 microcode: 0x2F
Topology: cpus: 1x cores: 2 tpc: 2 threads: 4 smt: enabled cache:
L1: 128 KiB desc: d-2x32 KiB; i-2x32 KiB L2: 512 KiB desc: 2x256 KiB
L3: 4 MiB desc: 1x4 MiB
Speed (MHz): avg: 2295 high: 2297 min/max: 500/3000 scaling:
driver: intel_cpufreq governor: performance cores: 1: 2296 2: 2297 3: 2295
4: 2294 bogomips: 19161
Flags: 3dnowprefetch abm acpi adx aes aperfmperf apic arat arch_perfmon
avx avx2 bmi1 bmi2 bts clflush cmov constant_tsc cpuid cpuid_fault cx16
cx8 de ds_cpl dtes64 dtherm dts epb ept ept_ad erms est f16c flexpriority
flush_l1d fma fpu fsgsbase fxsr ht ibpb ibrs ida intel_pt invpcid
invpcid_single lahf_lm lm mca mce md_clear mmx monitor movbe msr mtrr
nonstop_tsc nopl nx pae pat pbe pcid pclmulqdq pdcm pdpe1gb pebs pge pln
pni popcnt pse pse36 pti pts rdrand rdseed rdtscp rep_good sdbg sep smap
smep ss ssbd sse sse2 sse4_1 sse4_2 ssse3 stibp syscall tm tm2 tpr_shadow
tsc tsc_adjust tsc_deadline_timer vme vmx vnmi vpid x2apic xsave xsaveopt
xtopology xtpr
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: mmio_stale_data status: Unknown: No mitigations
Type: retbleed status: Not affected
Type: spec_store_bypass mitigation: Speculative Store Bypass disabled via
prctl
Type: spectre_v1 mitigation: usercopy/swapgs barriers and __user pointer
sanitization
Type: spectre_v2 mitigation: Retpolines, IBPB: conditional, IBRS_FW,
STIBP: conditional, RSB filling, PBRSB-eIBRS: Not affected
Type: srbds mitigation: Microcode
Type: tsx_async_abort status: Not affected
Graphics:
Device-1: Intel HD Graphics 5500 vendor: Dell driver: i915 v: kernel
arch: Gen-8 process: Intel 14nm built: 2014-15 ports: active: eDP-1
empty: HDMI-A-1 bus-ID: 00:02.0 chip-ID: 8086:1616 class-ID: 0300
Device-2: NVIDIA GK208BM [GeForce 920M] vendor: Dell driver: nvidia
v: 470.199.02 alternate: nouveau,nvidia_drm non-free: series: 470.xx+
status: legacy-active (EOL~2023/24) arch: Kepler code: GKxxx
process: TSMC 28nm built: 2012-18 pcie: gen: 1 speed: 2.5 GT/s lanes: 4
link-max: gen: 2 speed: 5 GT/s lanes: 8 bus-ID: 08:00.0 chip-ID: 10de:1299
class-ID: 0302
Device-3: Suyin Integrated_Webcam_HD driver: uvcvideo type: USB rev: 2.0
speed: 480 Mb/s lanes: 1 mode: 2.0 bus-ID: 2-5:2 chip-ID: 064e:920b
class-ID: 0e02 serial: <filter>
Display: x11 server: X.Org v: 21.1.8 with: Xwayland v: 23.1.2
compositor: kwin_x11 driver: X: loaded: modesetting,nvidia dri: iris
gpu: i915 display-ID: :0 screens: 1
Screen-1: 0 s-res: 1366x768 s-dpi: 96 s-size: 361x203mm (14.21x7.99")
s-diag: 414mm (16.31")
Monitor-1: eDP-1 model: ChiMei InnoLux 0x15dc built: 2015 res: 1366x768
hz: 60 dpi: 101 gamma: 1.2 size: 344x193mm (13.54x7.6") diag: 394mm (15.5")
ratio: 16:9 modes: 1366x768
API: OpenGL v: 4.6 Mesa 23.0.4 renderer: Mesa Intel HD Graphics 5500 (BDW
GT2) direct-render: Yes
Audio:
Device-1: Intel Broadwell-U Audio vendor: Dell driver: snd_hda_intel
v: kernel bus-ID: 00:03.0 chip-ID: 8086:160c class-ID: 0403
Device-2: Intel Wildcat Point-LP High Definition Audio vendor: Dell
driver: snd_hda_intel v: kernel bus-ID: 00:1b.0 chip-ID: 8086:9ca0
class-ID: 0403
Device-3: NVIDIA GK208 HDMI/DP Audio driver: snd_hda_intel v: kernel pcie:
gen: 1 speed: 2.5 GT/s lanes: 4 link-max: gen: 2 speed: 5 GT/s lanes: 8
bus-ID: 08:00.1 chip-ID: 10de:0e0f class-ID: 0403
API: ALSA v: k6.1.38-1-MANJARO status: kernel-api with: aoss
type: oss-emulator tools: alsactl,alsamixer,amixer
Server-1: JACK v: 1.9.22 status: off tools: N/A
Server-2: PipeWire v: 0.3.74 status: active with: 1: pipewire-pulse
status: active 2: pipewire-media-session status: active
tools: pactl,pw-cat,pw-cli
Network:
Device-1: Intel Wireless 3160 driver: iwlwifi v: kernel pcie: gen: 1
speed: 2.5 GT/s lanes: 1 bus-ID: 06:00.0 chip-ID: 8086:08b3 class-ID: 0280
IF: wlp6s0 state: up mac: <filter>
IP v4: <filter> type: dynamic noprefixroute scope: global
broadcast: <filter>
IP v6: <filter> type: dynamic noprefixroute scope: global
IP v6: <filter> type: noprefixroute scope: link
Device-2: Realtek RTL810xE PCI Express Fast Ethernet vendor: Dell
driver: r8169 v: kernel pcie: gen: 1 speed: 2.5 GT/s lanes: 1 port: e000
bus-ID: 07:00.0 chip-ID: 10ec:8136 class-ID: 0200
IF: enp7s0 state: down mac: <filter>
WAN IP: <filter>
Bluetooth:
Device-1: Intel Bluetooth wireless interface driver: btusb v: 0.8 type: USB
rev: 2.0 speed: 12 Mb/s lanes: 1 mode: 1.1 bus-ID: 2-6:3 chip-ID: 8087:07dc
class-ID: e001
Report: rfkill ID: hci0 rfk-id: 2 state: down bt-service: disabled
rfk-block: hardware: no software: yes address: see --recommends
Logical:
Message: No logical block device data found.
RAID:
Message: No RAID data found.
Drives:
Local Storage: total: 685.61 GiB used: 596.02 GiB (86.9%)
SMART Message: Unable to run smartctl. Root privileges required.
ID-1: /dev/sda maj-min: 8:0 vendor: Crucial model: CT480BX500SSD1
size: 447.13 GiB block-size: physical: 512 B logical: 512 B speed: 6.0 Gb/s
tech: SSD serial: <filter> fw-rev: 054 scheme: GPT
ID-2: /dev/sdb maj-min: 8:16 vendor: Lexar model: 256GB SSD
size: 238.47 GiB block-size: physical: 512 B logical: 512 B speed: 6.0 Gb/s
tech: SSD serial: <filter> fw-rev: 117D scheme: GPT
Message: No optical or floppy data found.
Partition:
ID-1: / raw-size: 82.98 GiB size: 82.98 GiB (100.00%) used: 71.98 GiB (86.7%)
fs: btrfs dev: /dev/sda4 maj-min: 8:4 label: Manjaro
uuid: d18277d5-35dd-426d-b08f-1698012272b1
ID-2: /home raw-size: 82.98 GiB size: 82.98 GiB (100.00%)
used: 71.98 GiB (86.7%) fs: btrfs dev: /dev/sda4 maj-min: 8:4 label: Manjaro
uuid: d18277d5-35dd-426d-b08f-1698012272b1
ID-3: /home/<filter>/mnt/Files raw-size: 355.96 GiB
size: 355.96 GiB (100.00%) used: 312.24 GiB (87.7%) fs: btrfs dev: /dev/sda3
maj-min: 8:3 label: Files uuid: 907a1476-33f5-4632-ac05-620c8142c6c2
ID-4: /home/<filter>/mnt/Files/Desktop/Games raw-size: 238.47 GiB
size: 234.17 GiB (98.20%) used: 211.78 GiB (90.4%) fs: ext4 dev: /dev/sdb3
maj-min: 8:19 label: Gamez uuid: 180ef44c-2aad-4868-9a2d-64129e419121
ID-5: /var/cache raw-size: 82.98 GiB size: 82.98 GiB (100.00%)
used: 71.98 GiB (86.7%) fs: btrfs dev: /dev/sda4 maj-min: 8:4 label: Manjaro
uuid: d18277d5-35dd-426d-b08f-1698012272b1
ID-6: /var/log raw-size: 82.98 GiB size: 82.98 GiB (100.00%)
used: 71.98 GiB (86.7%) fs: btrfs dev: /dev/sda4 maj-min: 8:4 label: Manjaro
uuid: d18277d5-35dd-426d-b08f-1698012272b1
Swap:
Kernel: swappiness: 10 (default 60) cache-pressure: 100 (default)
ID-1: swap-1 type: partition size: 8 GiB used: 16.2 MiB (0.2%) priority: -2
dev: /dev/sda5 maj-min: 8:5 label: SWAP
uuid: b0a37840-1afd-4537-8e1d-90330ec62d9e
Unmounted:
ID-1: /dev/sda1 maj-min: 8:1 size: 100 MiB fs: vfat label: SYSTEM
uuid: 5456-1C08
USB:
Hub-1: 1-0:1 info: full speed or root hub ports: 2 rev: 2.0
speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 1d6b:0002
class-ID: 0900
Hub-2: 1-1:2 info: Intel Integrated Hub ports: 8 rev: 2.0
speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 8087:8001
class-ID: 0900
Hub-3: 2-0:1 info: hi-speed hub with single TT ports: 11 rev: 2.0
speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 1d6b:0002
class-ID: 0900
Device-1: 2-5:2 info: Suyin Integrated_Webcam_HD type: video
driver: uvcvideo interfaces: 2 rev: 2.0 speed: 480 Mb/s (57.2 MiB/s) lanes: 1
mode: 2.0 power: 500mA chip-ID: 064e:920b class-ID: 0e02 serial: <filter>
Device-2: 2-6:3 info: Intel Bluetooth wireless interface type: bluetooth
driver: btusb interfaces: 2 rev: 2.0 speed: 12 Mb/s (1.4 MiB/s) lanes: 1
mode: 1.1 power: 100mA chip-ID: 8087:07dc class-ID: e001
Device-3: 2-8:4 info: Realtek RTS5129 Card Reader Controller
type: <vendor specific> driver: rtsx_usb,rtsx_usb_ms,rtsx_usb_sdmmc
interfaces: 1 rev: 2.0 speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0
power: 500mA chip-ID: 0bda:0129 class-ID: ff00 serial: <filter>
Hub-4: 3-0:1 info: super-speed hub ports: 4 rev: 3.0
speed: 5 Gb/s (596.0 MiB/s) lanes: 1 mode: 3.2 gen-1x1 chip-ID: 1d6b:0003
class-ID: 0900
Sensors:
System Temperatures: cpu: 55.0 C mobo: N/A sodimm: SODIMM C
Fan Speeds (RPM): cpu: 2200
Info:
Processes: 297 Uptime: 4h 25m wakeups: 10 Init: systemd v: 253
default: graphical tool: systemctl Compilers: gcc: 13.1.1 clang: 15.0.7
Packages: 1901 pm: pacman pkgs: 1858 libs: 538 tools: octopi,pamac,yay
pm: pkg pkgs: 0 pm: flatpak pkgs: 43 Shell: Zsh v: 5.9 running-in: yakuake
inxi: 3.3.28