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Siduction Forum => Upgrade Warnings (DE / EN) => Topic started by: orinoco on 2014/04/06, 19:00:41

Title: [solved] Dark display after d-u
Post by: orinoco on 2014/04/06, 19:00:41
Hello,

today I installed the latest Sidunction 64Bit on an older notebook. It's a Dell D830 with an Intel 965 graphic chip. After installation from usb-stick everything is fine. I can adjust brightness with Fn+Cursor (up|down). After d-u something changed. Now the display ist very dark and I can't adjust brightness anymore. I did some google search and tried the advice from http://wiki.gentoo.org/wiki/Intel#Brightness_doesn.27t_change_with_keyboard_shortcuts (http://wiki.gentoo.org/wiki/Intel#Brightness_doesn.27t_change_with_keyboard_shortcuts) to add

video.use_native_backlight=1

in the kernel parameters.

I also tried to create a xorg configuration like described in https://wiki.archlinux.org/index.php/Intel#Backlight_not_fully_adjusting.2C_or_adjusting_at_all.2C_after_resume. (https://wiki.archlinux.org/index.php/Intel#Backlight_not_fully_adjusting.2C_or_adjusting_at_all.2C_after_resume.) It doesn't help, too.

Any ideas how get brightness back?

P.S. More details: Fn+Cursor(up|down) still works in grub and early boot-phase (big letters in textmode). After turning into large resolution (is it kms?) the text gets darker and Fn+Cursor(up|down) doesn't work anymore.
Title: Re: Dark display after d-u
Post by: unklarer on 2014/04/06, 20:23:04
http://forum.siduction.org/index.php?topic=4442.0;topicseen
Title: Re: Dark display after d-u
Post by: orinoco on 2014/04/12, 21:09:02
This seems to be valid workaround for me

Code: [Select]
$ cat /etc/X11/xorg.conf.d/20-intel.conf
Section "Device"
        Identifier  "Intel Graphics"
        Driver      "intel"
        Option      "AccelMethod"     "sna"
        Option      "Backlight"       "intel_backlight" # use your backlight that works here
        BusID       "PCI:0:2:0"
EndSection