[SOLVED] Brightness issue -- ASUS 1001p

[Chris_OC]

Hi Chris_OC,

I suppose there is one last thing you could try, if you have removed it.?
Now you have it at a certain level, try adding back the:

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acpi_backlight=vendorback in the grub line.

Dave

I hadn't removed it (I looked to be sure) so it's cool, but thanks for the thought.

[Wirezfree]

Hi Chris_OC,

I suppose there is one last thing you could try, if you have removed it.?
Now you have it at a certain level, try adding back the:

Code: [Select]

acpi_backlight=vendorback in the grub line.

Dave

[Chris_OC]

Dave, thank you for the reference! The script:

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sudo setpci -s 00:02.0 f4.b=ff
brightened the screen by two full steps via fn+f5. As noted, that script alone goes away on reboot, but adding it to /etc/rc.local before exit 0 makes it permanent. It was clear on reboot with brightness at max, when the screen ticked up two notches on the login screen. I don't know if it's possible to make the screen brighter still, but it's plenty bright for me.

To sum up:

With Intel graphics, if the brightness controls don't work:

http://itsfoss.com/fix-brightness-ubuntu-1310/

Scroll down to "Fix brightness control issue..."

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To increase brightness:

Look at post#25 page 3 through to post #32 page 4
http://ubuntuforums.org/showthread.php?t=1566277&page=3

-------------------

Both of these answers can be considered Best Answer but it seems I can only choose one, and they were equally helpful. My thanks to both rokytnji and Wirezfree (Dave), as well as the authors of the items they linked to, for their help!

[Wirezfree]

Hi,

It seems you have it working, so you may not want to break it...

Not sure if this helps..??
Look at post#25 page 3 through to post #32 page 4
http://ubuntuforums.org/showthread.php?t=1566277&page=3

Dave

[Chris_OC]

You might get lucky with the below maybe?

http://itsfoss.com/fix-brightness-ubuntu-1310/

Hey, that worked! I don't know if the screen is brighter at max, but the brightness control actually works now, thru the fn keys and the brightness plug-in. It'll even bring the screen down to full darkness. If I can make the screen a little brighter, that would be nice, but this is an excellent start. Thanks for helping!

[Chris_OC]

No worries -- I appreciate your help.

And my head is spinning right now, so I'm gonna have to leave this alone for a while. Thanks again, and I'll let you know if I turn up anything.

[rokytnji]

Just to fill you in. I am just a tattooed scooter tramp that has no education and owns a few computers in my motorcycle shop.

So I am no coder. Just self taught is all.

You might get lucky with the below maybe?

http://itsfoss.com/fix-brightness-ubuntu-1310/

[rokytnji]

The number refers to what I gather from below

http://askubuntu.com/questions/149054/how-to-change-lcd-brightness-from-command-line-or-via-script

[Chris_OC]

What does that number refer to? I tried lower numbers just for the heck of it, and that didn't seem to make any difference.

[rokytnji]

The 1000 number was a wild guess on my part with the low number you gave earlier so that is why probably the invalid argument kicked in.

[Chris_OC]

You might be missing acpi_video0 maybe?

I have this: /sys/class/backlight/acpi_video0$ -- the system adds the $ sign.

And your ideas are not flaky, at least that I can tell. I know next to nothing about this stuff, so I'm in no position to judge, at any rate.

EDIT: I got permission, but now the command

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echo 1000 > /sys/class/backlight/intel_backlight/brightness
gives me an write error for invalid argument.

[rokytnji]

Try it as root then

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sudo -s
login. You should get a # prompt. Instead of $. Then

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echo 1000 > /sys/class/backlight/intel_backlight/brightness
without the sudo.

[Chris_OC]

Yeah, something is not right

try

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sudo echo 1000 > /sys/class/backlight/intel_backlight/brightness
Just to see if things get brighter or dimmer.

I get "permission denied" -- how do I bypass that?

[rokytnji]

Here is hoping I am on to something

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[email protected]:~$ cat /var/log/Xorg.0.log | grep backlight
[    24.159] (--) intel(0): found backlight control interface acpi_video0 (type 'firmware')

You might be missing acpi_video0 maybe?

In case you are wondering where I am getting my flaky ideas.

http://rog.asus.com/forum/showthread.php?41681-G75VW-Fn-Keys-Not-Working-For-Screen-Brightness-In-Linux

http://www.linlap.com/linlap.com?do=search&id=asus+1000

[rokytnji]

Yeah, something is not right

try

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sudo echo 1000 > /sys/class/backlight/intel_backlight/brightness
Just to see if things get brighter or dimmer.

Mine is at

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[email protected]:~$ cd /sys/class/backlight/intel_backlight/
[email protected]:/sys/class/backlight/intel_backlight$ ls
actual_brightness  bl_power  brightness  device  max_brightness  power  subsystem  type  uevent
[email protected]:/sys/class/backlight/intel_backlight$ cat max_brightness
39780
[email protected]:/sys/class/backlight/intel_backlight$ cat actual_brightness
39780
[email protected]:/sys/class/backlight/intel_backlight$

whose values are way higher than yours.