Public bug reported:

The Fn+Brightness keys on the Samsung NC-10, which need a quirk to work,
did not work with any Oneiric kernel until 3.0.0-15. This appears to be
because (according to the Changelog) a quirk was added to that version.
Previously, I had been using the latest natty kernel, which continued to
work.

Unfortunately, though I can see nothing relevant in the Changelog,
3.0.0-16 breaks this functionality again: the brightness controls allow
only the minimum, minimum + 1, and maximum brightness levels to be set,
but nothing intermediate.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: linux-image-3.0.0-16-generic 3.0.0-16.28
ProcVersionSignature: Ubuntu 3.0.0-15.26-generic 3.0.13
Uname: Linux 3.0.0-15-generic i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC272 Analog [ALC272 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
ApportVersion: 1.23-0ubuntu4
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC272 Analog [ALC272 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  rrt        1469 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xf0340000 irq 43'
   Mixer name   : 'Realtek ALC272'
   Components   : 'HDA:10ec0272,144dca00,00100001'
   Controls      : 20
   Simple ctrls  : 12
Date: Thu Feb 23 15:18:30 2012
HibernationDevice: RESUME=/dev/sda5
MachineType: SAMSUNG ELECTRONICS CO., LTD. NC10
ProcKernelCmdLine: root=UUID=fd8647f1-0fae-402b-b071-b04ab28d4d73 ro quiet 
splash
RelatedPackageVersions:
 linux-restricted-modules-3.0.0-15-generic N/A
 linux-backports-modules-3.0.0-15-generic  N/A
 linux-firmware                            1.60
RfKill: Error: [Errno 2] No such file or directory
SourcePackage: linux
UpgradeStatus: Upgraded to oneiric on 2011-10-06 (139 days ago)
dmi.bios.date: 09/08/2009
dmi.bios.vendor: Phoenix Technologies Ltd.
dmi.bios.version: 11CA.M015.20090908.RHU
dmi.board.name: NC10
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.:bvr11CA.M015.20090908.RHU:bd09/08/2009:svnSAMSUNGELECTRONICSCO.,LTD.:pnNC10:pvrNotApplicable:rvnSAMSUNGELECTRONICSCO.,LTD.:rnNC10:rvrNotApplicable:cvnSAMSUNGELECTRONICSCO.,LTD.:ct10:cvrN/A:
dmi.product.name: NC10
dmi.product.version: Not Applicable
dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386 oneiric running-unity

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https://bugs.launchpad.net/bugs/939862

Title:
  Brightness control on Samsung NC-10 no longer works properly

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