Ubuntu
acpi package

Screen brightness settings are not saved

Bug #979495 reported by Lina Pug
34
This bug affects 7 people
Affects Status Importance Assigned to Milestone
acpi (Ubuntu)
Confirmed
Undecided
Unassigned

Bug Description

The screen brightness always start with 100% and typing the Fn + F2/F3 keys only makes to appear the pointer on the screen, but doesn't work.

To change the screen brightness, only in the System Configurations – Brightness and Block, “every time that one switch on or restart the notebook”.

If one want to change again “ in the same session”, when the application window opens the screen brightness return to 100%.

I solve this problem changing the command line:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

to

GRUB_CMDLINE_LINUX_DEFAULT="quiet acpi_osi=Linux acpi_backlight=vendor splash"

even thus, at every restart one need to change the brightness, the configuration doesn't hold.

My Notebook:
Samsung model 300E4A-AD1
Intel Core i5 2450M
Ubuntu 12.04 64bits
Graphic Processor Intel GMA HD
Chipset Intel HM65

Revision history for this message
Prakash (prakash-p) wrote :

+1

Edward Donovan (edward.donovan)
summary: - Ubuntu-bug acpi
+ Screen brightness settings are not saved
Revision history for this message
Edward Donovan (edward.donovan) wrote :

Hi Lina, I thought I would try to provide a more descriptive title, again. Change it again if that doesn't describe it well enough. Thanks.

Prakash, if you want to quickly indicate that you see the same problem, the best thing to do is select 'Does thus bug affect you?', near the top. That can promote the bug's status, and help bring attention. Thanks!

Revision history for this message
Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in acpi (Ubuntu):
status: New → Confirmed
Revision history for this message
Daniel Letzeisen (dtl131) wrote :

The brightness setting not saved portion of this bug may be related to/duplicate of https://bugs.launchpad.net/ubuntu/+source/gnome-settings-daemon/+bug/896595

Revision history for this message
papukaija (papukaija) wrote :

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 896595, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.

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