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

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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!

** Affects: acpid (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: bot-comment
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Closing the lid does not generate an ACPI signal
https://bugs.launchpad.net/bugs/1037860
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