GNOME 3.2 [GDM] brightness level at minimum by default?

MatejLach · 2011-10-02 10:43:54

After I updated to GNOME 3.2, I noticed a strange problem;
When I boot I just get a blank (black) screen and no GDM! - But when I adjust my brightness to maximum I can see GDM as usual and everything is working as expected.
I did a little research, but found nothing...
I tried to reset my gnome settings to defaults, but that doesn't help...
I never had such problem using GNOME 3.0.x
Any ideas?

RichAustin · 2011-10-02 11:52:14

I used xbacklight as a startup application when I had this issue. It's most likely already installed. Run "gnome-session-properties" and add a new application with the parameter "xbacklight -set 100.0". I couldn't find any information on what causes the issue. By the way, "xbacklight -help" gives you a list of the settings.

HTH
Rich

MatejLach · 2011-10-02 12:29:06

RichAustin wrote:

I used xbacklight as a startup application when I had this issue. It's most likely already installed. Run "gnome-session-properties" and add a new application with the parameter "xbacklight -set 100.0". I couldn't find any information on what causes the issue. By the way, "xbacklight -help" gives you a list of the settings.
HTH
Rich

Thanks for the tip, but it doesn't help. It seems that xbacklight setup is completely ignored by my system...

RichAustin · 2011-10-02 13:43:36

Ok, well I don't know if this would resolve the issue but I'd give it a try:

xrandr --output LVDS --set BACKLIGHT_CONTROL native

I found this in a post at https://bugs.launchpad.net/ubuntu/+sour … bug/220407 .It seems that it's been an issue with Gnome for quite a while. On my HP G72 laptop xbacklight works perfectly, but I didn't need to use it prior to the Gnome 3.2 update. Interestingly I get the same issue in Ubuntu 11.10 and as I recall that uses Gnome 2 as the back end for Unity.

alculquicondor · 2011-10-02 16:41:18

After trying a lot of stuff in many configuration files, this was the best solution for me:
Adding the following line to /etc/gdm/Init/Default :

xbacklight -set 80

before exit 0 of course. Hope this helps

PD: If somebody finds the way to determine whether or not we have the AC adapter plugged in (so we can add to the script a nice conditional ), please, tell me.

Last edited by alculquicondor (2011-10-02 17:11:37)

wonder · 2011-10-02 16:57:39

instead of applying that hack, try using this patch: http://git.gnome.org/browse/gnome-setti … b0fd8fe949

alculquicondor · 2011-10-02 17:04:44

I already have it installed. How can i configure the backlight value? There is nothing about it here http://library.gnome.org/admin/gdm/stab … on.html.en

wonder · 2011-10-02 17:07:01

i didn't told you to install gnome-settings-daemon. instead i suggested to grab that change and incorporate in a package, built using abs and makepkg and install on your system.

snoxu · 2011-12-04 22:45:39

I think i have the same brightness issue.

How does one exactly apply this patch?

snoxu · 2011-12-14 13:31:32

Since I'm not that knowledgeable on solving my issue or applying patches, for now I'm managing with a workaround to set the brightness on starting gnome. Found it on the Linux Mint forums:

http://forums.linuxmint.com/viewtopic.p … 2&p=511586

Arch Linux

#1 2011-10-02 10:43:54

GNOME 3.2 [GDM] brightness level at minimum by default?

#2 2011-10-02 11:52:14

Re: GNOME 3.2 [GDM] brightness level at minimum by default?

#3 2011-10-02 12:29:06

Re: GNOME 3.2 [GDM] brightness level at minimum by default?

#4 2011-10-02 13:43:36

Re: GNOME 3.2 [GDM] brightness level at minimum by default?

#5 2011-10-02 16:41:18

Re: GNOME 3.2 [GDM] brightness level at minimum by default?

#6 2011-10-02 16:57:39

Re: GNOME 3.2 [GDM] brightness level at minimum by default?

#7 2011-10-02 17:04:44

Re: GNOME 3.2 [GDM] brightness level at minimum by default?

#8 2011-10-02 17:07:01

Re: GNOME 3.2 [GDM] brightness level at minimum by default?

#9 2011-12-04 22:45:39

Re: GNOME 3.2 [GDM] brightness level at minimum by default?

#10 2011-12-14 13:31:32

Re: GNOME 3.2 [GDM] brightness level at minimum by default?

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