For those of you with a Samsung laptop showing this problem, please see
this issue:
https://bugs.launchpad.net/ubuntu/+source/acpi/+bug/971061
in particular my last two posts.
I think a kernel patch can be made to flush the events from the embedded
controller, at resume, in the same way that I do it with my C program
that I attached to that issue for Samsung laptops (and maybe others with
the problem). TL;DR: If the events don't get flushed (queried), the GPE
of the EC is never triggered again (chicken and egg situation), my
little program queries the events and "unstucks" the EC immediatly.
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https://bugs.launchpad.net/bugs/89860
Title:
/proc/acpi/button/lid/*/state always says "open"
Status in “linux” package in Ubuntu:
Won't Fix
Status in “linux-source-2.6.20” package in Ubuntu:
Won't Fix
Status in “linux-source-2.6.22” package in Ubuntu:
Won't Fix
Bug description:
My laptop is an HP Pavilion dv4000. I'm running up-to-date Feisty.
Regardless of whether my laptop lid is open or closed, I always get
this:
root@peace:/etc/acpi# cat /proc/acpi/button/lid/*/state
state: open
This would explain why I can suspend the laptop using Gnome's power
management menu, but why it doesn't do it when I close the lid. (I
have specified under power management preferences that it's to suspend
when I close the lid.)
I know that at some level the lid switch works because when I press it
the screen backlight turns off (although I can still faintly see that
the display is still live).
There was one hint of the issue in this email:
http://lists.opensuse.org/opensuse-mobile/2007-02/msg00016.html
Here's a Ubuntu bug that seems similar, but got rejected:
https://launchpad.net/ubuntu/+source/kernel-package/+bug/16662
My bug is different than this one:
https://launchpad.net/ubuntu/+source/linux-source-2.6.15/+bug/34389
because my laptop state is *always* reported as open.
I've attached the output of dmesg and dmidecode.
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