Brightness key doesn work on my HP Probook450

English Hardware
#1

Hi, brightness keys doesnt work on my laptoop with Intel graphic UHD6200. Sound control keys works correctly. I have found many solutions on the Internet, but nothing works for me, or I dont understand It enough.
Can you help me please?
Thanks

OpenSuse 42.3 leap, KDE Plasma, EFI secure boot

#2

It can be a difficult thing to resolve, depending on the hardware concerned. What does the following report?

/usr/sbin/hwinfo --gfxcard

ls -l /sys/class/backlight

For the case of ‘intel_backlight’, I’ve read suggestions that involve using this minimal Xorg snippet. You’d need to create a custom file eg /etc/X11/xorg.conf.d/20-intel.conf with a CLI editor (as root)

Section "Device"
     Identifier "card0"
     Driver "intel"
     Option "Backlight" "intel_backlight"
EndSection

Then reboot when done.

Caveat: It does require that ‘xf86-video-intel’ is installed, and I’m not sure if this would be suitable for your Intel graphics hardware or not.

Some useful backlight references:
https://wiki.archlinux.org/index.php/backlight
https://sites.google.com/site/easylinuxtipsproject/display#TOC-Brightness-of-the-display-is-wrong-and-not-adjustable

#3

At least one Linux Mint user (with same/similar laptop model) used the above approach successfully it would seem so that’s promising…
https://forums.linuxmint.com/viewtopic.php?t=197761

#4

Thanks for reply.

 tom@HP-linux:~> /usr/sbin/hwinfo --gfxcard07: PCI 02.0: 0300 VGA compatible controller (VGA)              
  [Created at pci.378]
  Unique ID: _Znp.GXrratzarxA
  SysFS ID: /devices/pci0000:00/0000:00:02.0
  SysFS BusID: 0000:00:02.0
  Hardware Class: graphics card
  Device Name: "Onboard IGD"
  Model: "Intel VGA compatible controller"
  Vendor: pci 0x8086 "Intel Corporation"
  Device: pci 0x5917 
  SubVendor: pci 0x103c "Hewlett-Packard Company"
  SubDevice: pci 0x837d 
  Revision: 0x07
  Driver: "i915"
  Driver Modules: "i915"
  Memory Range: 0x1ff0000000-0x1ff0ffffff (rw,non-prefetchable)
  Memory Range: 0x1fe0000000-0x1fefffffff (ro,non-prefetchable)
  I/O Ports: 0x4000-0x403f (rw)
  IRQ: 130 (27031 events)
  Module Alias: "pci:v00008086d00005917sv0000103Csd0000837Dbc03sc00i00"
  Driver Info #0:
    Driver Status: i915 is active
    Driver Activation Cmd: "modprobe i915"
  Config Status: cfg=no, avail=yes, need=no, active=unknown


Primary display adapter: #7


tom@HP-linux:~> ls -l /sys/class/backlightcelkem 0
lrwxrwxrwx 1 root root 0 17. led 12.00 intel_backlight -> ../../devices/pci0000:00/0000:00:02.0/drm/card0/card0-eDP-1/intel_backlight

For the case of ‘intel_backlight’, I’ve read suggestions that involve using this minimal Xorg snippet. You’d need to create a custom file eg /etc/X11/xorg.conf.d/20-intel.conf with a CLI editor (as root)Code:
Section “Device”
Identifier “card0”
Driver “intel”
Option “Backlight” “intel_backlight”
EndSection
Then reboot when done.

I made 20-intel.conf, pasted code and reboot. After reboot only prompt appeared. As root I deleted this file, immediately graphical screen started. Fortunately …

#5

I tried this, but the same result as I wrote above… thaks