ubuntu-x-swat team mailing list archive

[EricP <876711@xxxxxxxxxxxxxxxxxx>]

I have the same laptop (Dell Latitude D430) as Bobik-s and am
experiencing what appears to be the same problem with a fresh install of
, so I'll add some more information.

I tried adding the following kernel boot parameters one-by-one:
acpi_backlight=vendor, 
acpi_backlight=video
dell_laptop.backlight=0 
None of them make any difference. The gnome-settings-daemon PPA didn't appear to make a difference either.

The Fn+Up/Fn+Dn work correctly at the login screen, but only if the
screen has not already automatically blanked. If the computer is left at
the login screen for ~10 minutes, then it will automatically blank. Move
the mouse and the backlight returns to partial brightness, but
Fn+Up/Fn+Dn  do nothing.

System Settings -> Screen contains a slider to adjust screen brightness.
If I first click on it with the mouse, I can then use the Left and Right
arrow keys to move the slider back and forth. After every 4 or 5 presses
of the left (or right) arrow key, the brightness changes, alternating
between brighter or dimmer. At either end of the slider the screen
brightness appears to alternate between minimum and maximum. When the
slider is 1 / 4 of the way across, the brightness alternates between 25%
and 75%. When the slider is near the middle, the alternations are barely
perceptible – perhaps between 40% and 60%

A question about something which may be related—the battery indicator at
the top of the screen is always visible, even when plugged in. Isn't it
supposed to disappear or change to indicate that it is running on AC?
Clicking on the indicator shows “Battery (charged)”. Removing the power
cord changes the text to “Battery  (1:50 left)”.

-- 
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xserver-xorg-video-intel in Ubuntu.
https://bugs.launchpad.net/bugs/876711

Title:
  Screen brightness resets to minmized when screen turns off

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