Ubuntu

Brightness Problem lenovo Z500

Asked by Himanshu Gupta

Hello All,
I am using Lenovo z500 Laptop. Recently i have switched from Windows to Ubuntu 18. But my brightness is going to nill. Function keys are also not working and i have put it on 100% , then to it was at its low. Their is no support fron lenovo site on ubuntu. So, Please anyone help me to fix this. Other wise i have to switch from ubuntu to windows agian

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Himanshu Gupta
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actionparsnip (andrew-woodhead666) said : 		#1

Adding the idle threat of switching back to windows doesn’t make anyone want to help you any more or any less.

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actionparsnip (andrew-woodhead666) said : 		#2

There is no Ubuntu 18. There is Ubuntu 18.04 and Ubuntu 18.10.

What is the output of:

lsb_release -a; uname -a

Thanks

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Himanshu Gupta (himz) said : 		#3

Here is the output for lsb_release

No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04.1 LTS
Release: 18.04
Codename: bionic
Linux himz-Lenovo-IdeaPad-Z500 4.15.0-42-generic #45-Ubuntu SMP Thu Nov 15 19:32:57 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
h

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actionparsnip (andrew-woodhead666) said : 		#4

The n it's Ubuntu 18.04, not Ubuntu 18

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actionparsnip (andrew-woodhead666) said : 		#5

Run:

sudo gedit /etc/default/grub

then look for
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

Change this to:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=video"

Save the new file, close gedit and run:
sudo update-grub

Reboot to test

Source:
https://forums.linuxmint.com/viewtopic.php?t=209185

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Himanshu Gupta (himz) said : 		#6

i am not able to update the grub file. Can you please help me in that .

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actionparsnip (andrew-woodhead666) said : 		#7

What is the output of the:

sudo update-grub

command, please?

Thanks.

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Himanshu Gupta (himz) said : 		#8

Thanks man , Its working. Thanks for your help , i really appreciate it.

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actionparsnip (andrew-woodhead666) said : 		#9

All I did was a cursory search. Came up immediately. One of the first links.

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actionparsnip (andrew-woodhead666) said : 		#10

All I did was a cursory search. Came up immediately. One of the first links.

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Himanshu Gupta (himz) said : 		#11

i tried that earlier with vi editor and i am not able to edit the grub file in vi. I have tried to override it to but not able to do that. But thanks now it works.