http://bugzilla.kernel.org/show_bug.cgi?id=8813
Summary: acpi does not rescan button event on resume, leading to
userspace confusion
Product: ACPI
Version: 2.5
KernelVersion: 2.6.23rc1
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Power-Other
AssignedTo: [EMAIL PROTECTED]
ReportedBy: [EMAIL PROTECTED]
CC: [EMAIL PROTECTED]
Most recent kernel where this bug did not occur: N/A
Distribution: Fedora core 7 with vanilla kernel
Hardware Environment: ThinkPad X60, tested with 7 various other machines
Software Environment: Stock F7 with vanilla kernel
Problem Description:
On resume we need to refresh the lid status as we will not get an event if
the lid opening was what triggered the suspend.
This manifests itself in users never getting a "lid open" event when a
suspend happens because of lid close on hardware that supports wake on
lid open. This makes userspace gets very confused indeed.
Patch attached forces a check of the lid status in the resume handler.
Steps to reproduce:
1. install linux
2. start evtest or gnome-power-manager
3. shut lid [machine suspends]
4. open lid [machine resumes]
5. observe no lid open event, userspace still thinks the lid is down
6. shut lid [machine ignores "duplicate event" and does not suspend
7. open lid [machine gets lid up event]
8. shut lid [machine suspends]
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