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Old 10-27-2012, 08:53 AM   #1
irgunII
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ACPI and APM necessary on a desktop?


I'm not sure if either of those are what controls the brightness stuff on Slackware 14, but if one or the other or both *are*, can I get rid (uninstall) of them on a desktop system? I'm tired of fighting this thing getting so bright constantly that I can hardly see the writing on the screen and having to go into system settings and drag the brightness back down. It's really getting to be a PITA. Whoever thought that doing this stuff automagically was a Good Thing© didn't stop to ask a good sized portion of users first if *they* would like it. It *should* have been a toggle, that way if one wanted to use it they could and those who didn't could leave it off. Seems like another of those 'fix what ain't broke' problems.
 
Old 10-27-2012, 10:49 AM   #2
Didier Spaier
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Be very careful if you want to disable ACPI, as even on some desktops the thermal kernel module depends on it:

Code:
Thermal Zone (ACPI_THERMAL)

CONFIG_ACPI_THERMAL:

This driver supports ACPI thermal zones. Most mobile and
some desktop systems support ACPI thermal zones. It is HIGHLY
recommended that this option be enabled, as your processor(s)
may be damaged without it.

To compile this driver as a module, choose M here:
the module will be called thermal.

Symbol: ACPI_THERMAL [=m]
Type : tristate
Prompt: Thermal Zone
Defined at drivers/acpi/Kconfig:231
Depends on: ACPI [=y] && ACPI_PROCESSOR [=m]
Location:
-> Power management and ACPI options
-> ACPI (Advanced Configuration and Power Interface) Support (ACPI [=y])
-> Processor (ACPI_PROCESSOR [=m]
Selects: THERMAL [=m]
So better try to find out how your system settings control the brightness and find a way to set it automatically at the level you want at start up.

Last edited by Didier Spaier; 10-27-2012 at 10:50 AM.
 
Old 11-01-2012, 10:33 AM   #3
jtsn
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Quote:
Originally Posted by irgunII View Post
I'm not sure if either of those are what controls the brightness stuff on Slackware 14, but if one or the other or both *are*, can I get rid (uninstall) of them on a desktop system?
APM ist obsolete since a decade. Therefore you don't have to get rid of it, there is a good chance, that your BIOS does not support it at all.

ACPI is needed for hardware enumeration (including support of multiple CPU cores) and controls way more than just display brightness. It is mandatory for booting a recent PC.
 
Old 11-02-2012, 06:52 PM   #4
irgunII
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Meh...okay, thanks guys. (still haven't found a way to make the brightness stop creeping upward and upward though)
 
Old 11-02-2012, 07:06 PM   #5
TobiSGD
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Which brightness control are you speaking about exactly?
Why don't you just use the monitors brightness control?
 
Old 11-06-2012, 10:48 AM   #6
irgunII
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No particular 'control'...simply that the brightness on the monitor would creep up brighter and brighter over a few hours. It would eventually stop at some fixed(?) point, but that point is far too bright for me.

Anyway, I'd tried all the software controls/adjustments *and* the monitors adjustments and neither stopped the creeping. I finally went and found something in system settings that seems to have done the trick:

In service manager, I turned off 'Power Management' and unticked it to *not* startup at boot.

So far, so good.
 
  


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