[Bug 1037860] Re: Closing the lid does not generate an ACPI signal

[Alf Haakon Lund]

I am on a Toshiba Satellite p850 running Ubuntu Studio 16.04

Just closing the lid will not suspend (regardless of settings), while
closing the lid and removing the power cable will successfully suspend
the machine.

ACPI readings similar to those described in OP.

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https://bugs.launchpad.net/bugs/1037860

Title:
  Closing the lid does not generate an ACPI signal

Status in acpid package in Ubuntu:
  Confirmed

Bug description:
  HP Pavilion dv4-2165dx Laptop 
  OS Version: 12.04.1 LTS

  
  closing the lid does not cause the machine to suspend as per settings in power management

  
  Summary:

  using acpi_listen to check for events:

  pressing the power button generates the output:

   "button/power PWRF 00000080 00000018"

  closing and opening the lid generates no output;

  however, if the power button is pressed again, the following output is
  produced:

  "button/power PWRF 00000080 00000019
  button/lid LID0 00000080 00000009"

  when pressed again:

  "button/power PWRF 00000080 0000001a
  button/lid LID0 00000080 0000000a"

  a third time:

  "button/power PWRF 00000080 0000001b"

  
  thus it seems that the acpi signal for the lid is not registered unless another acpi event occurs

  so a workaround is to connect the machine to AC power, close the lid,
  and remove the AC power. this causes the machine to suspend
  successfully, with acpi_listen producing the following output:

  "button/lid LID0 00000080 0000000f
  ac_adapter AC 00000080 00000000"

  Thanks!

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