Bug 43230

Summary:	Laptop doesn't go to sleep when undocking
Product:	ACPI	Reporter:	Peter Schneider (schneider.pj)
Component:	Other	Assignee:	acpi_other
Status:	REJECTED INVALID
Severity:	normal	CC:	alan, rui.zhang
Priority:	P1
Hardware:	All
OS:	Linux
URL:	https://bugs.launchpad.net/ubuntu/+source/linux/+bug/989635
Kernel Version:	Linux x220 3.4.0-030400rc4-generic	Subsystem:
Regression:	No	Bisected commit-id:

Description Peter Schneider 2012-05-11 13:31:05 UTC

I use Ubuntu 12.04.

I have a Thinkpad X220 and use it together with a Mini Dock 3 Plus. There is an external monitor connected to the dock. When using the computer in the dock, the laptops lid is closed.

When I undock the computer, I would expect that it goes to sleep as it does when I use it without the dock and close the lid. But it keeps running, and I need to open it up and close it again to get it to sleep.

Comment 1 Zhang Rui 2012-05-21 04:57:37 UTC

this sounds like a user space problem.
Kernel is not responsible for such strategy problems.
Usually, acpid catches the Lid event and set the platform to sleep when the lid is closed.
you can also write such a script to catch the dock event, and then suspend the system when lid is closed

Comment 2 Peter Schneider 2012-05-21 10:25:17 UTC

Thanks Zhang, I'm with you.