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cybertron
n00b
Joined: 30 Jan 2004
Posts: 65
Location: Sweden
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 Posted: Sun Jan 30, 2005 9:51 am Post subject: HOWTO: Acpi Lid Switch |
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hi there!
I might not contribute to much in this community, but now, I have finally gotten my lid-switch to work.
(i got it working by looking around in the forumposts)
First I must say that I am by no means a programmer, I do not leave and guarantee that it will work and not damage your computer/screen. ok?!
lets go on then!
I have an Inspiron 8500 and it has a lid switch. I you have a lid switch you may try to find it in /proc/acpi/buttons/lid/LID/ this of course assumes that you have
1. ACPI enabled in the kernel.
2. that you have emerge acpid
in that directory there are a file called "state" if you do a "cat state" it should read "open" and when you press down the lidswitch it should say c"
"close"
If this is not the case, do some research and try figure it out.
For the rest of us, continue.
Now we have established that the switch is recognized in the kernel/acpi.
Lets go to /etc/acpi/events/ and open up the file: default in an texteditor (or vi, nano, mc or whatever)
add:
| Code: |
event=button[ /]lid.*
action=sh /etc/acpi/lid.sh
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the first line here enables wich button to do the action for. And the lid.sh is our own script.
So, let's do it.
| Code: |
#!/bin/sh
grep -r close /proc/acpi/button/lid/LID/state
if [ $? -eq 0 ]; then
/usr/X11R6/bin/xset dpms force off
else
/usr/X11R6/bin/xset dpms force on
fi
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save this code as /etc/acpi/lid.sh
chmod it executable (liek chmod 777 lid.sh or whatever makes you happy)
then do a
/etc/init.d/acpid restart
and voila, it should work
Hopefully this howto/tutorial can make someother than me happy.
happy Gentooing everybody
/CyberTron
_________________
Gentoo using ~x86 branch
computer: Dell Inspiron 8500
everything working except standby/suspend
for newbie configs for gentoo/slackware: http://www.linuxportalen.info |
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AfroNinja
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Joined: 02 May 2003
Posts: 15
Location: Albuquerque, New Mexico
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| Posted: Sun Jan 30, 2005 7:11 pm Post subject: |
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thank you for the very informative how-to. I was not only able to get the lid switch working on my Inspiron 9100, but I've discovered a whole treasure trove of ACPI resources in so doing.
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"Earth's gods may sometimes be surpassed by a wise mortal."
-- HP Lovecraft, Dreamquest of Unknown Kadath (1939) |
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cybertron
n00b
Joined: 30 Jan 2004
Posts: 65
Location: Sweden
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| Posted: Sun Jan 30, 2005 7:40 pm Post subject: |
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nice that I could be of help. 
_________________
Gentoo using ~x86 branch
computer: Dell Inspiron 8500
everything working except standby/suspend
for newbie configs for gentoo/slackware: http://www.linuxportalen.info |
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AfroNinja
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Joined: 02 May 2003
Posts: 15
Location: Albuquerque, New Mexico
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| Posted: Mon Jan 31, 2005 2:08 am Post subject: |
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Okay, here's something strange. I restart the acpid daemon and it all works, but it stops working once I log out. DId you experience this?
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cybertron
n00b
Joined: 30 Jan 2004
Posts: 65
Location: Sweden
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| Posted: Mon Jan 31, 2005 5:33 am Post subject: |
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yes, I noticed that too when I restarted this morning...I have no clue why!! , I will try and look into the matter later today.
_________________
Gentoo using ~x86 branch
computer: Dell Inspiron 8500
everything working except standby/suspend
for newbie configs for gentoo/slackware: http://www.linuxportalen.info |
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AfroNinja
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Joined: 02 May 2003
Posts: 15
Location: Albuquerque, New Mexico
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| Posted: Mon Jan 31, 2005 6:26 am Post subject: |
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I posed elsewhere as well, if that information gives you anything helpful.
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AfroNinja
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Joined: 02 May 2003
Posts: 15
Location: Albuquerque, New Mexico
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| Posted: Tue Feb 01, 2005 2:58 am Post subject: |
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So, I think I figured it out. I booted to the LiveCD and ran the following code:
It spit back a few lines, among which was the kernel command line from boot. I noticed the parameter acpi=ht was added by default, and that the lid button worked when booting from the LiveCD.
I then changed my grub.conf to read as follows:
| Code: | default 0
timeout 1
splashimage=(hd0,0)/grub/splash.xpm.gz
title=Gentoo Linux 2.6.10-gentoo-r6
root (hd0,0)
kernel /kernel-2.6.10-gentoo-r6 root=/dev/hda3 acpi=ht
initrd /initrd-2.6.10-gentoo-r6 |
Voila! It works now. This isn't a perfect answer, but it'll work for now. I'm still searching for a better way to do this, as some ACPI stuff stops working when this is done.
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cybertron
n00b
Joined: 30 Jan 2004
Posts: 65
Location: Sweden
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| Posted: Tue Feb 01, 2005 7:44 am Post subject: |
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I found this answer on acpi=ht
| Quote: |
why some things stop working with acpi=ht
ht stands for "hyper-thread". what it does is disables all acpi settings except those needed by a hyper-threading processor. whatever it is that's causing the problem apparently isn't needed by a hyper-threading processor.  |
that is probably why the lid switch may work, and other stuff not..don't know.
keep on searching
_________________
Gentoo using ~x86 branch
computer: Dell Inspiron 8500
everything working except standby/suspend
for newbie configs for gentoo/slackware: http://www.linuxportalen.info |
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cybertron
n00b
Joined: 30 Jan 2004
Posts: 65
Location: Sweden
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| Posted: Tue Feb 01, 2005 7:53 am Post subject: |
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look at your /var/log/acpid log file.....there are som intressting stuff there
it says that it is in fact executing the action but this line comes up:
/usr/X11R6/bin/xset: unable to open display " "
I wonder why.......anyone else has an idea?
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Gentoo using ~x86 branch
computer: Dell Inspiron 8500
everything working except standby/suspend
for newbie configs for gentoo/slackware: http://www.linuxportalen.info |
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truekaiser
l33t
Joined: 05 Mar 2004
Posts: 823
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| Posted: Tue Feb 01, 2005 8:30 am Post subject: |
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| cybertron wrote: | look at your /var/log/acpid log file.....there are som intressting stuff there
it says that it is in fact executing the action but this line comes up:
/usr/X11R6/bin/xset: unable to open display " "
I wonder why.......anyone else has an idea? |
root isn't allowed to accsess the x server. |
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cybertron
n00b
Joined: 30 Jan 2004
Posts: 65
Location: Sweden
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| Posted: Tue Feb 01, 2005 8:52 am Post subject: |
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how would one solve this problem without being a security risc?
I mean 1 solution is to give root access to X which, if I understand correctly, is a security risc
is there any other solution? and if not, how do I achieve the above?
_________________
Gentoo using ~x86 branch
computer: Dell Inspiron 8500
everything working except standby/suspend
for newbie configs for gentoo/slackware: http://www.linuxportalen.info |
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AfroNinja
n00b
Joined: 02 May 2003
Posts: 15
Location: Albuquerque, New Mexico
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| Posted: Tue Feb 01, 2005 4:52 pm Post subject: |
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| cybertron wrote: | I found this answer on acpi=ht
| Quote: |
why some things stop working with acpi=ht
ht stands for "hyper-thread". what it does is disables all acpi settings except those needed by a hyper-threading processor. whatever it is that's causing the problem apparently isn't needed by a hyper-threading processor. |
that is probably why the lid switch may work, and other stuff not..don't know.
keep on searching |
I've also noticed that the entire /proc/acpi tree vanishes when acpi=ht is used, which is why nothing else works. It seems that many acpi features are handled by hardware as opposed by software with this setting.
There are some semi-secure settings with xset, at least according to the man page, but I can't get them to work once I've logged out and am back at the gdm greeter.
For instance, xset +local: seems to imply connections from any local, non-network account, and it works while I'm logged in, but once I log out, nothing.
Also, I found some nice scripts in this post, but this guy wasn't able to provide a workable laptop lid solution either.
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maiku
l33t
Joined: 24 Mar 2004
Posts: 608
Location: Escaping from NY
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| Posted: Fri Mar 18, 2005 2:03 am Post subject: |
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| cybertron wrote: | how would one solve this problem without being a security risc?
I mean 1 solution is to give root access to X which, if I understand correctly, is a security risc
is there any other solution? and if not, how do I achieve the above? |
I pretty much had the same problem. I only found that putting 'su mike -c' and enclosing it in quotes worked for me. I'd like a better solution also.
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AfroNinja
n00b
Joined: 02 May 2003
Posts: 15
Location: Albuquerque, New Mexico
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| Posted: Fri Mar 18, 2005 4:30 am Post subject: |
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I was able to get it to work by putting xhost +local in my .profile file for each user. I just added that to /etc/skel so new users would have it too. The only downside is that it requires a user be logged in for it to work.
Additionally, the script I'm using doesn't account for mouse movement while the lid is closed -- the display comes in and stays on in that case.
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