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

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: acpid (Ubuntu)
       Status: New => Confirmed

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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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