Reduce power button brightness on Linux Mint

[Benjamin-Loison]

https://community.frame.work/t/turn-off-power-led/11967/3

Related to Benjamin-Loison/cinnamon/issues/67#issuecomment-2146256288 and #11.

+48

[Benjamin-Loison]

Related to #13.

[Benjamin-Loison]

ectool help

Output:

Usage: ectool [--dev=n] [--interface=dev|i2c|lpc] [--i2c_bus=n][--name=cros_ec|cros_fp|cros_pd|cros_scp|cros_ish] [--ascii] <command> [params]

  --i2c_bus=n  Specifies the number of an I2C bus to use. For
               example, to use /dev/i2c-7, pass --i2c_bus=7.
               Implies --interface=i2c.

Commands:
  adcread <channel>
      Read an ADC channel.
  addentropy [reset]
      Add entropy to device secret
  apreset
      Issue AP reset
  autofanctrl <on>
      Turn on automatic fan speed control.
  backlight <enabled>
      Enable/disable LCD backlight
  battery
      Prints battery info
  batterycutoff [at-shutdown]
      Cut off battery output power
  batteryparam
      Read or write board-specific battery parameter
  boardversion
      Prints the board version
  button [vup|vdown|rec] <Delay-ms>
      Simulates button press.
  cbi
      Get/Set/Remove Cros Board Info
  chargecurrentlimit
      Set the maximum battery charging current
  chargecontrol
      Force the battery to stop charging or discharge
  chargeoverride
      Overrides charge port selection logic
  chargestate
      Handle commands related to charge state v2 (and later)
  chipinfo
      Prints chip info
  cmdversions <cmd>
      Prints supported version mask for a command number
  console
      Prints the last output to the EC debug console
  cec
      Read or write CEC messages and settings
  echash [CMDS]
      Various EC hash commands
  eventclear <mask>
      Clears EC host events flags where mask has bits set
  eventclearb <mask>
      Clears EC host events flags copy B where mask has bits set
  eventget
      Prints raw EC host event flags
  eventgetb
      Prints raw EC host event flags copy B
  eventgetscimask
      Prints SCI mask for EC host events
  eventgetsmimask
      Prints SMI mask for EC host events
  eventgetwakemask
      Prints wake mask for EC host events
  eventsetscimask <mask>
      Sets the SCI mask for EC host events
  eventsetsmimask <mask>
      Sets the SMI mask for EC host events
  eventsetwakemask <mask>
      Sets the wake mask for EC host events
  extpwrlimit
      Set the maximum external power limit
  fanduty <percent>
      Forces the fan PWM to a constant duty cycle
  flasherase <offset> <size>
      Erases EC flash
  flasheraseasync <offset> <size>
      Erases EC flash asynchronously
  flashinfo
      Prints information on the EC flash
  flashspiinfo
      Prints information on EC SPI flash, if present
  flashpd <dev_id> <port> <filename>
      Flash commands over PD
  flashprotect [now] [enable | disable]
      Prints or sets EC flash protection state
  flashread <offset> <size> <outfile>
      Reads from EC flash to a file
  flashwrite <offset> <infile>
      Writes to EC flash from a file
  forcelidopen <enable>
      Forces the lid switch to open position
  fpcontext
      Sets the fingerprint sensor context
  fpencstatus
      Prints status of Fingerprint sensor encryption engine
  fpframe
      Retrieve the finger image as a PGM image
  fpinfo
      Prints information about the Fingerprint sensor
  fpmode [capture|deepsleep|fingerdown|fingerup]
      Configure/Read the fingerprint sensor current mode
  fpseed
      Sets the value of the TPM seed.
  fpstats
      Prints timing statisitcs relating to capture and matching
  fptemplate [<infile>|<index 0..2>]
      Add a template if <infile> is provided, else dump it
  gpioget <GPIO name>
      Get the value of GPIO signal
  gpioset <GPIO name>
      Set the value of GPIO signal
  hangdetect <flags> <event_msec> <reboot_msec> | stop | start
      Configure or start/stop the hang detect timer
  hello
      Checks for basic communication with EC
  hibdelay [sec]
      Set the delay before going into hibernation
  hostsleepstate
      Report host sleep state to the EC
  hostevent
      Get & set host event masks.
  i2cprotect <port> [status]
      Protect EC's I2C bus
  i2cread
      Read I2C bus
  i2cwrite
      Write I2C bus
  i2cxfer <port> <slave_addr> <read_count> [write bytes...]
      Perform I2C transfer on EC's I2C bus
  infopddev <port>
      Get info about USB type-C accessory attached to port
  inventory
      Return the list of supported features
  kbfactorytest
      Scan out keyboard if any pins are shorted
  kbid
      Get keyboard ID of supported keyboards
  kbinfo
      Dump keyboard matrix dimensions
  kbpress
      Simulate key press
  keyscan <beat_us> <filename>
      Test low-level key scanning
  led <name> <query | auto | off | <color> | <color>=<value>...>
      Set the color of an LED or query brightness range
  lightbar [CMDS]
      Various lightbar control commands
  mkbpget <buttons|switches>
      Get MKBP buttons/switches supported mask and current state
  mkbpwakemask <get|set> <event|hostevent> [mask]
      Get or Set the MKBP event wake mask, or host event wake mask
  motionsense [CMDS]
      Various motion sense control commands
  panicinfo
      Prints saved panic info
  pause_in_s5 [on|off]
      Whether or not the AP should pause in S5 on shutdown
  pdcontrol [suspend|resume|reset|disable|on]
      Controls the PD chip
  pdchipinfo <port>
      Get PD chip information
  pdlog
      Prints the PD event log entries
  pdwritelog <type> <port>
      Writes a PD event log of the given <type>
  pdgetmode <port>
      Get All USB-PD alternate SVIDs and modes on <port>
  pdsetmode <port> <svid> <opos>
      Set USB-PD alternate SVID and mode on <port>
  port80flood
      Rapidly write bytes to port 80
  port80read
      Print history of port 80 write
  powerinfo
      Prints power-related information
  protoinfo
       Prints EC host protocol information
  pse
      Get and set PoE PSE port power status
  pstoreinfo
      Prints information on the EC host persistent storage
  pstoreread <offset> <size> <outfile>
      Reads from EC host persistent storage to a file
  pstorewrite <offset> <infile>
      Writes to EC host persistent storage from a file
  pwmgetfanrpm [<index> | all]
      Prints current fan RPM
  pwmgetkblight
      Prints current keyboard backlight percent
  pwmgetnumfans
      Prints the number of fans present
  pwmgetduty
      Prints the current 16 bit duty cycle for given PWM
  pwmsetfanrpm <targetrpm>
      Set target fan RPM
  pwmsetkblight <percent>
      Set keyboard backlight in percent
  pwmsetduty
      Set 16 bit duty cycle of given PWM
  rand <num_bytes>
      generate <num_bytes> of random numbers
  readtest <patternoffset> <size>
      Reads a pattern from the EC via LPC
  reboot_ec <RO|RW|cold|hibernate|hibernate-clear-ap-off|disable-jump> [at-shutdown|switch-slot]
      Reboot EC to RO or RW
  reboot_ap_on_g3
      Requests that the EC will automatically reboot the AP the next time
      we enter the G3 power state.
  rollbackinfo
      Print rollback block information
  rtcget
      Print real-time clock
  rtcgetalarm
      Print # of seconds before real-time clock alarm goes off.
  rtcset <time>
      Set real-time clock
  rtcsetalarm <sec>
      Set real-time clock alarm to go off in <sec> seconds
  rwhashpd <dev_id> <HASH[0] ... <HASH[4]>
      Set entry in PD MCU's device rw_hash table.
  rwsig <info|dump|action|status> ...
      info: get all info about rwsig
      dump: show individual rwsig field
      action: Control the behavior of RWSIG task.
      status: Run RW signature verification and get status.
{  rwsigaction (DEPRECATED; use "rwsig action")
      Control the behavior of RWSIG task.
  rwsigstatus (DEPRECATED; use "rwsig status"
      Run RW signature verification and get status.
  sertest
      Serial output test for COM2
  smartdischarge
      Set/Get smart discharge parameters
  stress [reboot] [help]
      Stress test the ec host command interface.
  sysinfo [flags|reset_flags|firmware_copy]
      Display system info.
  switches
      Prints current EC switch positions
  temps <sensorid>
      Print temperature.
  tempsinfo <sensorid>
      Print temperature sensor info.
  thermalget <platform-specific args>
      Get the threshold temperature values from the thermal engine.
  thermalset <platform-specific args>
      Set the threshold temperature values for the thermal engine.
  tpselftest
      Run touchpad self test.
  tpframeget
      Get touchpad frame data.
  tmp006cal <tmp006_index> [params...]
      Get/set TMP006 calibration
  tmp006raw <tmp006_index>
      Get raw TMP006 data
  typeccontrol <port> <command>
      Control USB PD policy
  typecdiscovery <port> <type>
      Get discovery information for port and type
  typecstatus <port>
      Get status information for port
  uptimeinfo
      Get info about how long the EC has been running and the most
      recent AP resets
  usbchargemode <port> <mode> [<inhibit_charge>]
      Set USB charging mode
  usbmux <mux>
      Set USB mux switch state
  usbpd <port> <auto | [toggle|toggle-off|sink|source] [none|usb|dp|dock] [dr_swap|pr_swap|vconn_swap]>
      Control USB PD/type-C [deprecated]
  usbpdmuxinfo
      Get USB-C SS mux info
  usbpdpower [port]
      Get USB PD power information
  version
      Prints EC version
  waitevent <type> [<timeout>]
      Wait for the MKBP event of type and display it
  wireless <flags> [<mask> [<suspend_flags> <suspend_mask>]]
      Enable/disable WLAN/Bluetooth radio

Related to Benjamin-Loison/cinnamon/issues/168#issuecomment-3582164843.

pwm occurrences do not seem interesting.

Should check entry by entry and possible new commits.

[Benjamin-Loison]

Note that sometimes the power LED is blinking for an unknown reason and being able to set a lower brightness or even 0 would be nice.

[Benjamin-Loison]

Especially relevant when laptop is suspend, hence the power LED is blinking and the lid is not closed, as it can literally light up the whole room in the dark.

[Benjamin-Loison]

jonas-schievink/keylightd/blob/933a4cf851009d4a8c1b4ce7725556d69d4b82db/README.md?plain=1#L47

jonas-schievink/keylightd/blob/933a4cf851009d4a8c1b4ce7725556d69d4b82db/src/main.rs#L68-L83

does not seem yet as promising.

Related to issues/33#issuecomment-3567296419.