Hardware - Support > Video Cards
Adjusting Screen brightness
gold_finger:
--- Quote from: Colin23erk on July 18, 2014, 04:55:12 AM ---I found this --- but Lite does not have Gedit installed . Should I be able to use the "Simple Text Editor " ad how do I get the equivalent of( sudo gedit /etc/default/grub)
--- End quote ---
Yes.
Gedit happens to be the text editor used in those instructions, but any text editor can be substituted. The real name of the "Simple Text Editor" used in Linux Lite is "leafpad". So just substitute "leafpad" wherever you see "gedit" in the instructions.
Instructions will work as shown with that substitution, but technically you should use "gksu" or "gksudo" in place of "sudo" when opening a GUI program from the terminal as root.
So, to open that grub file in leafpad:
--- Code: ---gksu leafpad /etc/default/grub
--- End code ---
Then just follow instructions to edit the file with changes; save the file; then close leafpad.
Once leafpad is closed, the prompt will return to the terminal and you can then run:
--- Code: ---sudo update-grub
--- End code ---
Colin23erk:
Hi Scott
As you say its a old Problem .
I understand the developers time is limited and this problem may not be considered important and so does not get fixed . The downside it leads to a lot of frustrated users wasting time and effort trying to fix it themselves .
This can have a negative impact on the take up of Ubutu and its derivatives because they are deemed not fit for purpose for the non tech user who wants it to work out of the box .
I found this --- but Lite does not have Gedit installed . Should I be able to use the "Simple Text Editor " ad how do I get the equivalent of( sudo gedit /etc/default/grub)
Well my friends have been facing brightness problem in Ubuntu 12.04 Precise Pangolin. And every one were facing and asking me to help me out with it. So, I viewed all over the Internet and helped them out. I helped with it myself too in Dell XPS 13. And for friends Acer Aspire, HP Pavilion DV6. So it might work on most of all the PCs.
My friends were just trying the xrand solution that just decreases the Contrast which had no effect on the power consumption. So, this solution was the most to be kept. I am feeling quite when the Fn(Function key) and the Brightness Up and Down are working great. You can follow up the procedure that I have kept in an easy steps.
Open terminal ( Ctrl+Alt+T ) and type:
sudo gedit /etc/default/grub
You will find this line in the new opened window:
1
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
Change it to:
1
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"
Save and close the window and type this in the terminal:
sudo update-grub
This will update your grub and while rebooting your PC, it will set an extra parameter on the grub menu during boot. This problem might have occur on due to the upgrade on kernel.
Enjoy the power saving system.
Colin23erk:
Hi Scott
Thanks for the ideas . had looked at http://itsfoss.com/fix-brightness-ubuntu-1310/
but its a Command solution and fails to respond at the Terminal stage for me . That opens a new can of worms for me for me to sort.
That was why I was looking for someone who had experience of using the Brightness Control . Does it work OK for them or not and have they found a working solution for Lite .
Colin
Reticent:
This is just one of many remedies needed throughout the decades to cope with hardware vendor pranks. Maybe it will suggest a productive direction of inquiry.
Scott:
A quick Google of "xubuntu 14.04 brightness" shows this is clearly an issue.
This link looks promising.
http://itsfoss.com/fix-brightness-ubuntu-1310/
or
Results from Googling "xubuntu 14.04 brightness"
https://www.google.com/#q=xubuntu+14.04+brightness
If you get it fixed write back and let us know what worked. ~Scott
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version