documentation-packages team mailing list archive

[Gunnar Hjalmarsson <1545266@xxxxxxxxxxxxxxxxxx>]

Hi Kevin,

I do not know much about this topic, but...

On 2016-02-13 13:03, Kevin Leeds wrote:
> Also when i try to do
>  sudo echo 50 > /sys/class/backlight/acpi_video0/brightness
> then it says 'bash: brightness: permission denied'.
> (From this page: http://pastebin.com/HzzHrS2g).

That command would need to be changed to e.g.:

sudo sh -c 'echo 50 > /sys/class/backlight/acpi_video0/brightness'

> I would love to help provide some more help on my dual monitor setup.

Did you see these pages in the official documentation:

https://help.ubuntu.com/stable/ubuntu-help/display-dual-monitors-
desktop.html

https://help.ubuntu.com/stable/ubuntu-help/display-dual-monitors.html

** Changed in: ubuntu-docs (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1545266

Title:
  screen brightness slider has no effect

Status in ubuntu-docs package in Ubuntu:
  Incomplete

Bug description:
  Trusty Tahr 14.04 LTS, seems to be fully updated

  f.lux also has no effect.

  Also when i try to do
   sudo echo 50 > /sys/class/backlight/acpi_video0/brightness
  then it says 'bash: brightness: permission denied'.
  (From this page: http://pastebin.com/HzzHrS2g).

  product: OptiPlex 7010 (OptiPlex 7010)

   *-cpu
            description: CPU
            product: Intel(R) Core(TM) i3-3240 CPU @ 3.40GHz
  *-pci
            description: Host bridge
            product: Xeon E3-1200 v2/3rd Gen Core processor DRAM Controller
            vendor: Intel Corporation
   *-display
               description: VGA compatible controller
               product: Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller

  I would love to help provide some more help on my dual monitor setup.
  I found this documentation: https://wiki.ubuntu.com/X/Config/Resolution
  It says I should run $gnome-display-properties. Seems to be out of date. 
  gnome-display-properties: command not found

  I guess it would be annoying to say it's a security vulnerability
  although if my screen isn't dim someone could more easily look through
  the window and see what I am typing on the screen.

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