Brightness Control

[nujinini]

Hi!

I execute this and it gets me to control my screen brightness in Mint which is an Ubuntu-based OS and it gets me to control my backlight. However, it does not respond in my Ubuntu 9.10 and is giving me this error report that I cannot understand.

jun@jun-laptop:~$ xrandr --output LVDS --set BACKLIGHT_CONTROL native
X Error of failed request:  BadRROutput (invalid Output parameter)
  Major opcode of failed request:  149 (RANDR)
  Minor opcode of failed request:  15 (RRGetOutputProperty)
  Serial number of failed request:  26
  Current serial number in output stream:  26
jun@jun-laptop:~$

I hope someone can help me correct this issue since my eyes are killing me and my battery's life is much shorter. Ubuntu was really my first OS of choice when I started to go serious on Linus 10 months ago. The problem then ws every time I tried to install jaunty, my X would get screwed up. I was very happy to see that karmic has solved that problem. Now, I just need some fine tuning to make karmic my "home". Thanks!

[Rubberman]

Don't the usual hotkeys work? They do for us, and we are running both 9.04 and 9.10. Is this a laptop or desktop system? If desktop, your monitor should have a hardwired brightness control, even if you have to access it via an on-screen menu. Mine do anyway.

[nujinini]

Don't the usual hotkeys work? They do for us, and we are running both 9.04 and 9.10. Is this a laptop or desktop system? If desktop, your monitor should have a hardwired brightness control, even if you have to access it via an on-screen menu. Mine do anyway.

No.

My hotkeys, work for XP out of the box. Also in Mint after I execute the command

xrandr --output LVDS --set BACKLIGHT_CONTROL native

In Ubunt 9.10, an image appears on screen as if there were some adjustments happening in the light but in reality, the brightness is not changing.

EDIT: By the way, its a Lenovo G430, Laptop

[Rubberman]

Yeah. A lot of this sort of cruft with 9.10 is why I'm sticking with 9.04 for now. I've had no trouble at all with 9.04. I think the new kernel in 9.10, and the associated changes in all the drivers, is a major reason why there are all these little hardware glitches with 9.04.

[nujinini]

I've had bigger problems with 9.04. It was my first OS of choice 10 months ago when we tried to install it, the X acts up and is warbled every time it starts. I was really happy when I tried to install 9.1 and got it working, wireless, flash and just done installing virtualbox. Now if I can just find a way to adjust brightness, I'd say I would truly have completed all what I needed, basically.

[Rubberman]

I've had wobbly video on my CentOS system as well at times. Usually, just logging out and restarting the x server will fix it. Somehow it gets the video card into some weird state and all the images on the screen do a little dance, vibrate sort of. And this is with LCD displays on a DVI interface.

[nujinini]

I've had wobbly video on my CentOS system as well at times. Usually, just logging out and restarting the x server will fix it. Somehow it gets the video card into some weird state and all the images on the screen do a little dance, vibrate sort of. And this is with LCD displays on a DVI interface.

I think the problem was quite serious. The X is really screwed up when we tried to install the live CD. And we did try several times and was not able to get pass trough the first "frame"? The place where I was suppose to choose the language? It's really screwed like can't understand a thing. My friend tried to make adjustments in video card but was not successful. We checked the CD and it was ok. Installed it even in another laptop & pc. But anyway, I'm really glad 9.10 seems to be compatible with my laptop.

Darn! If I can just adjust the brightness...

[nujinini]

Hi!

In my trying to get to adjust the brightness of my monitor, I stumbled upon this:

root@jun-laptop:/# cd proc

root@jun-laptop:/proc# cd acpi

root@jun-laptop:/proc/acpi# cd video

root@jun-laptop:/proc/acpi/video# cd GFX0

root@jun-laptop:/proc/acpi/video/GFX0# 

root@jun-laptop:/proc/acpi/video/GFX0# cd DD02

root@jun-laptop:/proc/acpi/video/GFX0/DD02# ls
brightness  EDID  info  state

root@jun-laptop:/proc/acpi/video/GFX0/DD02# cat brightness
levels:  5 15 25 35 45 55 65 75 85 95 100
current: 100

I tried to change the settings manually from the current:100 to 55 but it won't allow me to do so.
May I continue to please ask for some help regarding this concern? Thank you for your continued patience!