Still can't change brightness at boot

ponygon101 · 2013-02-14 00:14:29

I've scoured through the Arch Linux forums and I've tried everything that I could find and understand. I wanted to set the brightness to something visible when my laptop turns on as it goes straight to zero at each boot.

Well... not exactly. When I turn it on and reach the grub menu, brightness is just fine. Then I see the plymouth screen for about 2-3 seconds then the screen turns goes down to the lowest brightness for a second, turns back on and I see from udev stuff for less than a second then it's black with the the terminal cursor at the top left for a bit. After that, the screen is back down to zero and the login screen appears.

I have an HP 2000 Laptop. I have tried to echo what's in /sys/class/backlight/acpi_video0/backlight and /sys/class/backlight/intel_backlight/brightness in /etc/rc.local but that seems to have done nothing. I couldn't seem to find much else so I'm hoping someone can help

Last edited by ponygon101 (2013-02-14 00:39:58)

jasonwryan · 2013-02-14 00:19:19

You are posting in kernel and hardware but we have no clue about either on your machine...

Please read How To Ask Questions The Smart Way:
we would need details about your machine, what exists in /sys/ that can be manually adjusted, what tools you have
tried to manage it with, etc, etc.

ponygon101 · 2013-02-14 00:42:07

jasonwryan wrote:

You are posting in kernel and hardware but we have no clue about either on your machine...
Please read How To Ask Questions The Smart Way:
we would need details about your machine, what exists in /sys/ that can be manually adjusted, what tools you have
tried to manage it with, etc, etc.

Sorry about that. I updated my original post. Let me know if you need any further information and please move this if I've posted in the wrong subforum

Last edited by ponygon101 (2013-02-14 00:45:41)

jasonwryan · 2013-02-14 00:45:27

There is no /etc/rc.local anymore. What happens when you echo the value manually, does it work?

What about xkbacklight?

ponygon101 · 2013-02-14 01:01:44

jasonwryan wrote:

There is no /etc/rc.local anymore.

Oh it's gone? That would explain why it doesn't work anymore. Sorry, I'm rather new form Ubuntu.

jasonwryan wrote:

What happens when you echo the value manually, does it work?
What about xkbacklight?

When I try to put it in terminal with or without sudo, it says permission denied. I can use xbacklight and the hardware keys to change the backlight once I reach the login screen.

trescott2000 · 2013-03-07 10:18:03

echo doesn't work correctly with sudo. See this post for some alternatives.

Arch Linux

#1 2013-02-14 00:14:29

Still can't change brightness at boot

#2 2013-02-14 00:19:19

Re: Still can't change brightness at boot

#3 2013-02-14 00:42:07

Re: Still can't change brightness at boot

#4 2013-02-14 00:45:27

Re: Still can't change brightness at boot

#5 2013-02-14 01:01:44

Re: Still can't change brightness at boot

#6 2013-03-07 10:18:03

Re: Still can't change brightness at boot

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