Brightness option in Samsung Notebook.

Asked by RY Seshan on 2012-09-16

When Brightness option used for dimming or turn off the screen in samsung notebook which i use not working. Automatic dimming and brightness control is displayed and system hangs.

Question information

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English Edit question
Status:
Answered
For:
Ubuntu acpi Edit question
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Last query:
2012-09-16
Last reply:
2012-09-16

Can you give the output of:

sudo dmidecode -t 1; lsb_release -a; uname -a

Thanks

RY Seshan (ryseshan-gmail) said : #2

# dmidecode 2.11
SMBIOS 2.6 present.

Handle 0x0001, DMI type 1, 27 bytes
System Information
 Manufacturer: SAMSUNG ELECTRONICS CO., LTD.
 Product Name: 300E4Z/300E5Z/300E7Z
 Version: 0.1
 Serial Number: HLEH93EB900779
 UUID: A6D83F40-1DE9-11B2-8000-92FF980AC6E9
 Wake-up Type: Power Switch
 SKU Number: System SKUNumber
 Family: HuronRiver System

No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 12.04.1 LTS
Release: 12.04
Codename: precise
Linux ryseshan-SamsungNotebook-300E5Z 3.2.0-30-generic-pae #48-Ubuntu SMP Fri Aug 24 17:14:09 UTC 2012 i686 i686 i386 GNU/Linux

If you run:

sudo setpci -s 00:02.0 F4.B=80

Is it ok?

Also add the boot option:

acpi_backlight=vendor

HTH

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