where is the backlight dimmer?

[dansar]

HI...I downloaded LL on this old 32 bit hp laptop. I really like it but how do you dim the screen?  I used the fn keys in Vista but they do not work in LL.  The only other issue is no volume control on the taskbar but I managed to solve that one...Thank you in advance for any help.  dansar

[Wirezfree]

Hi,

Getting back-lights to work can vary depending on the Laptop type/hardware.
To help people, help you...
Can you open a terminal.(ctrl+alt+t), then type in:

Code:

inxi -F

Then copy an paste the results back into this thread in "insert code"


This post explains how to post in "insert code"

[newtusmaximus]

you might also wish to look at
http://alternativeto.net/software/f-lux/?platform=linux

I have been using f-lux  for some time  https://justgetflux.com/

[dansar]

dan@dan-HP-G60-Notebook-PC:~$ inxi -F
System:    Host: dan-HP-G60-Notebook-PC Kernel: 3.19.0-56-generic i686 (32 bit)
          Desktop: Xfce 4.11.8 Distro: Ubuntu 14.04 trusty
Machine:  System: Hewlett-Packard product: HP G60 Notebook PC version: PCID
          Mobo: Hewlett-Packard model: 3612 version: 09.67 Bios: Hewlett-Packard version: F.65 date: 12/15/2010
CPU:      Dual core Pentium CPU T4200 (-MCP-) cache: 1024 KB flags: (lm nx pae sse sse2 sse3 ssse3)
          Clock Speeds: 1: 2000.00 MHz 2: 2000.00 MHz
Graphics:  Card: Intel Mobile 4 Series Integrated Graphics Controller
          X.Org: 1.17.1 drivers: intel (unloaded: fbdev,vesa) Resolution: 1366x768@60.0hz
          GLX Renderer: Mesa DRI Mobile Intel GM45 Express x86/MMX/SSE2 GLX Version: 2.1 Mesa 10.5.9
Audio:    Card: Intel 82801I (ICH9 Family) HD Audio Controller driver: snd_hda_intel Sound: ALSA ver: k3.19.0-56-generic
Network:  Card-1: Realtek RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller driver: r8169
          IF: eth0 state: down mac: 00:1f:16:70:95:c4
          Card-2: Qualcomm Atheros AR242x / AR542x Wireless Network Adapter (PCI-Express) driver: ath5k
          IF: wlan0 state: up mac: 00:24:2b:b5:c5:1c
Drives:    HDD Total Size: 320.1GB (2.1% used) 1: id: /dev/sda model: FUJITSU_MHZ2320B size: 320.1GB
Partition: ID: / size: 19G used: 6.2G (36%) fs: ext4 ID: swap-1 size: 3.15GB used: 0.00GB (0%) fs: swap
RAID:      No RAID devices detected - /proc/mdstat and md_mod kernel raid module present
Sensors:  System Temperatures: cpu: 58.0C mobo: 57.0C
          Fan Speeds (in rpm): cpu: N/A
Info:      Processes: 180 Uptime: 37 min Memory: 768.7/2960.7MB Client: Shell (b

[Wirezfree]

Hi,

I do not have that specific HP Model... But on "2" other HP Laptops I was able to get the Brightness keys working with the following:
In a terminal(ctrl+alt+t)

Code:

gksu leafpad /etc/default/grub

enter your password, Then find the line with:

Code:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

and change it to:

Code:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"

Then file > save and then exit from editor.
Then in the terminal:

Code:

sudo update-grub

If asked, enter your password.
then exit the terminal.

Then re-boot and see if the keys work.

[dansar]

I did not have any luck with that fix but that is just a minor thing. Besides Vista and Lite I also have 4 other linux distros on this machine. When I dim the display on one of them it seems to carry over. I am 76 yrs old and a bright display makes my eyes tear. I appreciate your help. Thank you.  Dan

[Wirezfree]

Hi,

One last thing to try, if you want.?
Repeat the above instructions and change the line which says:

Code:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"

To:

Code:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=linux acpi_backlight=vendor"

[Monkeyman]

I never knew you could dim the display on a laptop.  Never tried it on mine.

[Wirezfree]

@ MonkeyMan
Yes, on most laptops you will have what looks something like a *(small) and *(Large) on usually 2 of the FN(Function) keys.
These allow you to turn the brightness Up and Down.
Sometimes you press the keys by themselves, or sometimes FN+ plus one of the keys.

[dansar]

That did not work. Must be a Lite bug because the fn key plus f7 or f8 to higher or lower the brightness level works fine on LXLE,Peppermint,Mint Mate,Mint Xfce and Windows Vista. Dan