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Thread: Lemur brightness hotkeys

  1. #1
    Join Date
    Oct 2007
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    Lemur brightness hotkeys

    Hi again,

    I plan to install OpenSUSE 11.3 on the Lemur. While I've figured out what needs to be done for the webcam driver by unpacking the System76 driver deb file and examining the python scripts in there, I was wondering if someone from System76 could point out the modifications done to make the Fn-keys for brightness work.

    Thanks!

    Update: I finished installing OpenSUSE 11.3 on the Lemur. So far, the only thing that does not work are the brightness hotkeys. However, the brightness itself can be adjusted using the command line or the KDE power management settings. Even the webcam worked right out of the box!
    Last edited by msrinath80; August 2nd, 2010 at 08:08 AM.

  2. #2
    Join Date
    Oct 2007
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    Aurora, CO
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    2,564
    Distro
    Ubuntu

    Re: Lemur brightness hotkeys

    I did a bit of googling, and I found out on an OpenSuse forum that you'll need to add "acpi_osi=Linux" as a kernel parameter to make the brightness hotkeys work.

    I'm not sure if OpenSuse is still using legacy GRUB or GRUB2, so you'll need to check with the OpenSuse crowd as to how exactly to add a boot parameter.
    Ian Santopietro - System76 Technical Support.
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  3. #3
    Join Date
    Oct 2007
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    264

    Smile Re: Lemur brightness hotkeys

    Thanks very much for that hint isantop. After trying acpi_osi="Linux", I googled a bit more and tried acpi_osi="!Linux", acpi_osi="Windows 2006" and acpi_osi="!Windows 2006". Neither of them worked!

    Before I was about to give up, I decided to check out the complete list of options for the kernel parameter acpi_osi and found that one of the settings is simply:

    Code:
    acpi_osi=
    without any strings appended after the "equal to" symbol. Apparently, this disables all strings since it seems that the kernel by default appends something to this parameter. And guess what, this worked!

    Thanks a bunch!

  4. #4
    Join Date
    Oct 2007
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    Aurora, CO
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    Distro
    Ubuntu

    Re: Lemur brightness hotkeys

    Despite having given the wrong solution, I take pride in the fact that through my wrong solution, you were able to extrapolate the correct solution. This is what I love about Linux. If one person make a mistake, others grow on and learn from the mistake. Windows doesn't let you specify boot parameters to begin with, so it would never have made it that far.

    Congratulations on fixing your problem.
    Ian Santopietro - System76 Technical Support.
    Open a Support Ticket!
    Ask a Sales Question!

  5. #5
    Join Date
    Oct 2007
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    264

    Re: Lemur brightness hotkeys

    Totally concur

  6. #6
    Join Date
    Oct 2007
    Beans
    264

    Re: Lemur brightness hotkeys

    Just an update. OpenSUSE 11.3 was sooooooo unstable. Flash with full screen playback would lock up, torcs would lock up in the middle of a race, as would quake3. I've reverted to Debian squeeze (32 bit with the bigmem kernel so I can use all 4 Gigs) for good. Ahh, the stability And yes, for anyone who is interested, everything works out of the box with Debian squeeze. Just the webcam requires some firmware and a rebuilding of a kernel module. Grab the system76 driver deb file, unpack it, and find the python script that downloads and builds support for the Lemur webcam. Follow those instructions and you're good to go!

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