It was changed to
GRUB_CMDLINE_LINUX=acpi_backlight=vendor
As was suggested by you above.
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https://bugs.launchpad.net/bugs/1181512
Title:
Cannot adjust screen brightness
To
** Changed in: unity (Ubuntu)
Status: Invalid = New
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https://bugs.launchpad.net/bugs/1181512
Title:
Cannot adjust screen brightness
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Public bug reported:
Dell Inspiron 15 (3521) i5 64bit laptop
With Ubuntu 12.04 and 12.10, the Dell Laptop would allow me to change
screen brightness using Fn+F4 (brightness down) and Fn+F5 (brightness
up).
After upgrading to 13.10, the buttons respond but I can only adjust
brightness one step
Thanks Kiran. But you got me into trouble there.
the part that you asked me to change was:
change
GRUB_CMDLINE_LINUX=acpi_backlight=vendor
but it was shown on the file as:
GRUB_CMDLINE_LINUX=
I did the change as you mentioned and then saved it and ran the other
command in your list.
There was
Thanks Kiran. But you got me into trouble there.
the part that you asked me to change was:
change
GRUB_CMDLINE_LINUX=acpi_backlight=vendor
but it was shown on the file as:
GRUB_CMDLINE_LINUX=
I did the change as you mentioned and then saved it and ran the other
command in your list.
There was
Saw the Invalid status.
Perhaps I should explain further. The Fn key combo was pre-assigned on
the laptop by DELL and worked very well with 12.04, 12.10 13.04
versions of Ubuntu.
Since at present there is no way to save my brightness settings to my
account, I could set the brightness each time
