Linux - HardwareThis forum is for Hardware issues.
Having trouble installing a piece of hardware? Want to know if that peripheral is compatible with Linux?
Welcome to LinuxQuestions.org, a friendly and active Linux Community.
You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today!
Note that registered members see fewer ads, and ContentLink is completely disabled once you log in.
If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here.
Having a problem logging in? Please visit this page to clear all LQ-related cookies.
Introduction to Linux - A Hands on Guide
This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter.
For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration. This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant. They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own.
Click Here to receive this Complete Guide absolutely free.
I'm having an issue with my lid "button". Normally it would detect a little magnet in the top of my screen when it is closed - this part works great. Unfortunately it also triggers randomly when there is a slight press on the area where the "button" is located. I have set action "nothing" on lid close in system settings (it's quite better than suspend) still my screen goes blank. This way from time to time my screen starts to flicker - really annoying.
I decided that I'm not going to solve this in hardware - instead I'd like to set a custom action for lid close event. More specifically I'd like to turn the screen off when the lid is closed for more than a second. This should work, as false signals from lid button last just for fractions of a second. Setting action to true "do nothing" would satisfy me just as well.
I'm running Ubuntu 12.04.1 LTS 64 bit with kernel 3.2.0-37-generic on Acer Aspire 7741G. The problem is irrelevant to OS - the button also behaves badly in Windows and BIOS. It started more than 1.5 years ago, but it wouldn't happen as often as now.
I don't know if this is going to help but I can check the current state of lid by reading '/proc/acpi/button/lid/LID0/state' - it is either "state: open" or "state: closed". I'm sure there is a way to control the behavior on lid close. I've had a situation, when somehow ACPI control functions of Linux got screwed - the file listed above would output "state: unsupported" instead and it seemed that BIOS took over the work of turning the screen off (it started to flicker instantly, without any lag - just as it does in BIOS). After restarting computer it was back to normal again. This shows that OS does control action on lid close - I need to find a way to change it.