[Samsung NF310] Backlight can only be set to min or max brightness
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Fix Released
|
Medium
|
Seth Forshee | ||
Oneiric |
Fix Released
|
Undecided
|
Seth Forshee | ||
Precise |
Fix Released
|
Medium
|
Seth Forshee |
Bug Description
== SRU Justification ==
Impact: On Samsung NF310 and other models, backlight adjustments do not work properly. The ACPI backlight interface doesn't work at all. The samsung-laptop driver sort of works, but the backlight can only be set to brightness levels 0, 1, and 8.
Fix: Upstream cherry pick to quirk brightness adjustments for these models.
Test Case: I've verified this personally on the NF310. Also verified to help on the N220P on LP #810093, although an additional patch is required to fully fix the issues on that machine.
---
When attempting to change the backlight level on this machine to anything other than the maximum or minimum brightness, the backlight level will continue to change in the direction of the adjustment until it reaches the maximum or minimum brightness. There are patches to fix this issue in kernel version 3.2.
ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: linux-image-
ProcVersionSign
Uname: Linux 3.0.0-12-generic x86_64
NonfreeKernelMo
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
AplayDevices:
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC269VB Analog [ALC269VB Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC269VB Analog [ALC269VB Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xf0400000 irq 47'
Mixer name : 'Realtek ALC269VB'
Components : 'HDA:10ec0269,
Controls : 14
Simple ctrls : 9
Date: Mon Nov 28 13:52:26 2011
HibernationDevice: RESUME=
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta amd64 (20110922)
MachineType: SAMSUNG ELECTRONICS CO., LTD. NF110/NF210/NF310
ProcEnviron:
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=
RelatedPackageV
linux-
linux-
linux-firmware 1.60
SourcePackage: linux
StagingDrivers: brcmsmac brcmutil
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/28/2010
dmi.bios.vendor: Phoenix Technologies Ltd.
dmi.bios.version: 03MY.M029.
dmi.board.
dmi.board.name: NF110/NF210/NF310
dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
dmi.board.version: Not Applicable
dmi.chassis.
dmi.chassis.type: 10
dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
dmi.chassis.
dmi.modalias: dmi:bvnPhoenixT
dmi.product.name: NF110/NF210/NF310
dmi.product.
dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.
Related branches
description: | updated |
Changed in linux (Ubuntu): | |
status: | In Progress → Fix Released |
Changed in linux (Ubuntu Oneiric): | |
status: | New → Fix Committed |
assignee: | nobody → Seth Forshee (sforshee) |
Test build posted at:
http:// people. canonical. com/~sforshee/ lp897378/ linux-3. 0.0-14. 23~lp897378v201 112012054/
Seems to be working well on my NF310.