Jump to content
Sign in to follow this  
dil_bert

seting the brightness - xbacklight -set or : acpi_video0 & intel_backlight

Recommended Posts

Hello dear all

i am running MX-Linux on a lenovo notebook. 


yesterday i recognized that the brightness is to low - how can i customize and solve this issue. how to change the settings: 


should i go like so: 

https://forum.mxlinux.org/viewtopic.php?t=41893


I have installed MX 16 on my laptop and am quite impressed with it. I usually set the Display Brightness to 50% as it is more convenient for me. What I found is after I restart MX 16, the brightness reverts back to 100% and I will have to reset it to 50% manually. The same thing gets repeated after restarting the OS. Please do something to correct it.
its a quirk in xfce. I use a utility called "xbacklight" to set the brightness level to where I want. in my case, 70%

xbacklight -set 70

or should i go like so: 

Brightness: acpi_video0 & intel_backlight

https://forum.mxlinux.org/viewtopic.php?t=47809



[Cross-posted in Xfce forums, 'coz ToZ]

Hello. I have some trouble with the brightness controls on my netbook (hardware and software details below):

Fn+F5/F6 seems to use acpi_video0. Fn keys make the brightness change, and the notification popup appear, but don't move the bar in the popup nor the slider in the Power Manager plugin.

Xfce Power Manager v 1.6.1 seems to use intel_backlight when I use the slider or scroll over the panel icon. This way I can get higher max brightness compared to using the Fn keys.

I'd like to use intel_backlight, as it has a bigger max value and is more fine grained (off-topic, anyone knows about the logarithmic scale proposed here, sounded great!), and marginally would like the slider and notification popup update their position properly.

Here's some info from my system:    


user@netbook:~$ cat /proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-4.13.0-1-686-pae root=UUID=bcb90034-53b6-482c-a4b1-b35db0c2b510 ro quiet



I tried some of the "popular" acpi options on the grub command line, to no visible effect.


user@netbook:~$ lspci -k | grep -iA2 VGA
00:02.0 VGA compatible controller: Intel Corporation Mobile 945GSE Express Integrated Graphics Controller (rev 03)
    Subsystem: ASUSTeK Computer Inc. Mobile 945GSE Express Integrated Graphics Controller
    Kernel driver in use: i915




user@netbook:~$ for i in /sys/class/backlight/*; do echo $i;cat $i/brightness;cat $i/max_brightness;done
/sys/class/backlight/acpi_video0
14
15
/sys/class/backlight/intel_backlight
7989
39780




user@netbook:~$ pastebinit /var/log/Xorg.0.log
https://pastebin.com/60pFPuSy




user@netbook    :~$ inxi -GMS
System:    Host: mx1 Kernel: 4.13.0-1-686-pae i686 bits: 32 Desktop: Xfce 4.12.3 
           Distro: MX-17_386 Horizon December 15  2017 
Machine:   Type: Laptop System: ASUSTeK product: 1005HA v: x.x serial: <root required> 
           Mobo: ASUSTeK model: 1005HA v: x.xx serial: <root required> BIOS: American Megatrends v: 1102 
           date: 10/16/2009 
Graphics:  Device-1: Intel Mobile 945GSE Express Integrated Graphics driver: i915 v: kernel 
           Display: x11 server: X.Org 1.19.2 driver: intel resolution: 1024x600~60Hz 
           OpenGL: renderer: Mesa DRI Intel 945GME x86/MMX/SSE2 v: 1.4 Mesa 18.2.6 


Following advice from old forum posts, I modified these two file, maybe I should just modify one of them?

user@netbook:~$ cat /usr/share/X11/xorg.conf.d/20-intel.conf
Section "Device"
        Identifier  "card0"
        Driver      "intel"
        Option      "Backlight"    "intel_backlight"
        BusID       "PCI:0:2:0"
EndSection




user@netbook:~$ cat /etc/X11/xorg.conf.d/20-intel.conf 
Section "Device"
   Identifier  "Intel Graphics"
   Driver      "intel"
   Option      "AccelMethod" "sna"             # was "uxa"
   Option      "Backlight"   "intel_backlight" # I added this line
   Option      "TearFree"    "true"
   BusID       "PCI:0:2:0"                     # and maybe this one too? I don't remember!


Thanks for any help

i love to hear from you

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.