** Description changed:
+ == 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-3.0.0-12-generic 3.0.0-12.20
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic x86_64
NonfreeKernelModules: wl
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
+ **** 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
+ **** 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/controlC0: sforshee 1521 F.... pulseaudio
+ USER PID ACCESS COMMAND
+ /dev/snd/controlC0: sforshee 1521 F.... pulseaudio
Card0.Amixer.info:
- Card hw:0 'Intel'/'HDA Intel at 0xf0400000 irq 47'
- Mixer name : 'Realtek ALC269VB'
- Components : 'HDA:10ec0269,144dc08c,00100100'
- Controls : 14
- Simple ctrls : 9
+ Card hw:0 'Intel'/'HDA Intel at 0xf0400000 irq 47'
+ Mixer name : 'Realtek ALC269VB'
+ Components : 'HDA:10ec0269,144dc08c,00100100'
+ Controls : 14
+ Simple ctrls : 9
Date: Mon Nov 28 13:52:26 2011
HibernationDevice: RESUME=UUID=5ed9cd2d-6fd3-4b72-a595-4724f79b20e6
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
+ PATH=(custom, no user)
+ LANG=en_US.UTF-8
+ SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-12-generic
root=UUID=efa8de0b-1647-4cb1-9f03-bb2b4da1637c ro quiet splash vt.handoff=7
RelatedPackageVersions:
- linux-restricted-modules-3.0.0-12-generic N/A
- linux-backports-modules-3.0.0-12-generic N/A
- linux-firmware 1.60
+ linux-restricted-modules-3.0.0-12-generic N/A
+ linux-backports-modules-3.0.0-12-generic N/A
+ 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.M029.20101228.JIP
dmi.board.asset.tag: SAMSUNG
dmi.board.name: NF110/NF210/NF310
dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
dmi.board.version: Not Applicable
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
dmi.chassis.version: N/A
dmi.modalias:
dmi:bvnPhoenixTechnologiesLtd.:bvr03MY.M029.20101228.JIP:bd12/28/2010:svnSAMSUNGELECTRONICSCO.,LTD.:pnNF110/NF210/NF310:pvrNotApplicable:rvnSAMSUNGELECTRONICSCO.,LTD.:rnNF110/NF210/NF310:rvrNotApplicable:cvnSAMSUNGELECTRONICSCO.,LTD.:ct10:cvrN/A:
dmi.product.name: NF110/NF210/NF310
dmi.product.version: Not Applicable
dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.
** Changed in: linux (Ubuntu)
Status: In Progress => Fix Released
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https://bugs.launchpad.net/bugs/897378
Title:
[Samsung NF310] Backlight can only be set to min or max brightness
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