In my case I am using samsung tools

On Thu, Jan 6, 2011 at 9:40 AM, TenaciousC <email address hidden> wrote:

> With the the 2.6.35-24 kernel I could not control  backlight brightness
> using the samsung tools (Fn-Up/Fn-Down) at all. I had to add a further
> kernel parameter : acpi_backlight=vendor .  With that the control works
> again, but when the backlight level is changed by the system (for power
> saving) the brightness indicator applet goes into a loop until
> interrupted by clicking an item on the main menu bar (Applications for
> example).
>
> However I removed intel_idle.max_cstate=0 from the kernel boot
> parameters and the problem stills occurs, so I'm not sure the
> brightness phenomenon is related to these parameters.
>
> C
>
> --
> You received this bug notification because you are a direct subscriber
> of the bug.
> https://bugs.launchpad.net/bugs/640100
>
> Title:
>  Maverick fails to wake up on Samsung N150
>
> Status in “linux” package in Ubuntu:
>  Confirmed
>
> Bug description:
>  Recently upgraded from 10.04LTS to 10.10 Beta on a Samsung N150 NetBook.
>  Since update, my netbook does not resume from suspend state after lid is
> opened.  Power, disk, and wireless activity lights turn on, but screen does
> not wake up.  I cannot ssh into the netbook from a remote host so I do not
> think that the network is resuming even though the wireless light indicates
> that the card is on.  I have to power off/on the netbook once it is hung in
> this state.
>
> I've examined /var/log/messages after power cycling but I don't see any
> relevant errors.  I would be happy to submit applicable logs or provide more
> information if someone could point me in the right direction.
>
> Thanks!
>
> == Regression details ==
> Last known good version: mainline 2.6.34.7-maverick
> Confirmed broken since: 2.6.35-22.34
>
> ---
> AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
> AplayDevices:
>  **** List of PLAYBACK Hardware Devices ****
>  card 0: Intel [HDA Intel], device 0: ALC269 Analog [ALC269 Analog]
>    Subdevices: 1/1
>    Subdevice #0: subdevice #0
> Architecture: i386
> ArecordDevices:
>  **** List of CAPTURE Hardware Devices ****
>  card 0: Intel [HDA Intel], device 0: ALC269 Analog [ALC269 Analog]
>    Subdevices: 1/1
>    Subdevice #0: subdevice #0
> AudioDevicesInUse:
>  Cannot stat file /proc/13903/fd/11: Stale NFS file handle
>                       USER        PID ACCESS COMMAND
>  /dev/snd/controlC0:  ubuntu     3659 F.... pulseaudio
> CRDA: Error: [Errno 2] No such file or directory
> Card0.Amixer.info:
>  Card hw:0 'Intel'/'HDA Intel at 0xf0400000 irq 47'
>    Mixer name   : 'Realtek ALC269'
>    Components   : 'HDA:10ec0269,144dc072,00100004'
>    Controls      : 11
>    Simple ctrls  : 7DistroRelease: Ubuntu 10.10LiveMediaBuild:
> Ubuntu-Netbook 10.10 "Maverick Meerkat" - Release i386 (20101007)
> MachineType: SAMSUNG ELECTRONICS CO., LTD. N150/N210/N220
> Package: linux (not installed)
> ProcCmdLine: BOOT_IMAGE=/casper/vmlinuz noprompt cdrom-detect/try-usb=true
> persistent file=/cdrom/preseed/hostname-netbook.seed boot=casper
> initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
> ProcEnviron:
>  LANG=en_US.UTF-8
>  SHELL=/bin/bash
> ProcVersionSignature: Ubuntu 2.6.35-22.33-generic 2.6.35.4Regression: Yes
> RelatedPackageVersions: linux-firmware 1.38
> Reproducible: Yes
> RfKill:
>  0: phy0: Wireless LAN
>   Soft blocked: no
>   Hard blocked: noTags: maverick ubuntu-une kernel-power suspend resume
> regression-release needs-upstream-testing
> Uname: Linux 2.6.35-22-generic i686
> UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
> dmi.bios.date: 03/25/2010
> dmi.bios.vendor: Phoenix Technologies Ltd.
> dmi.bios.version: 08JI.M073.20100325.JIP
> dmi.board.asset.tag: SAMSUNG
> dmi.board.name: N150/N210/N220
> 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.:bvr08JI.M073.20100325.JIP:bd03/25/2010:svnSAMSUNGELECTRONICSCO.,LTD.:pnN150/N210/N220:pvrNotApplicable:rvnSAMSUNGELECTRONICSCO.,LTD.:rnN150/N210/N220:rvrNotApplicable:cvnSAMSUNGELECTRONICSCO.,LTD.:ct10:cvrN/A:
> dmi.product.name: N150/N210/N220
> dmi.product.version: Not Applicable
> dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.
>
>
>
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>



-- 
Montini