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Thread: ThinkPad T410 Screen Brightness

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  1. #1
    Join Date
    Mar 2005
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    277

    ThinkPad T410 Screen Brightness

    I'm having a little trouble with the screen brightness of my new thinkpad T410. Using the hotkeys (fn + Home or fn + End) the applet shows that the screen brightness is changing, however the brightness stays at maximum. I'm running Ubuntu 9.10, with 2.6.32-19. Has anyone had a similar problem? Also the screen brightness applet in gnome does not have any affect.

    Thanks in advance.
    ThinkPad T410: Core i7@2.66Ghz, NVIDIA NVS 3100m 256Mb, 4GB Ram, 500GB HDD, BT, a/b/g/n wifi
    ThinkPad R61: Core 2 Duo T8100@2.1Ghz, Intel X3100, 3GB Ram, 160GB HDD, 6cell Battery, 14inch WXGA.

  2. #2
    Join Date
    Sep 2005
    Location
    Toronto, ON, Canada
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    68
    Distro
    Ubuntu 9.10 Karmic Koala

    Re: ThinkPad T410 Screen Brightness

    I am having this problem too, since activating the nvidia proprietary drivers. Brightness worked fine before I did so.

  3. #3
    Join Date
    Mar 2005
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    277

    Re: ThinkPad T410 Screen Brightness

    There is some more discussion on the T410 in this thread:

    http://ubuntuforums.org/showthread.php?t=1383110&page=1

    Doesn't look like too many people have the nvidia graphics card, though but hopefully a solution will present itself.
    ThinkPad T410: Core i7@2.66Ghz, NVIDIA NVS 3100m 256Mb, 4GB Ram, 500GB HDD, BT, a/b/g/n wifi
    ThinkPad R61: Core 2 Duo T8100@2.1Ghz, Intel X3100, 3GB Ram, 160GB HDD, 6cell Battery, 14inch WXGA.

  4. #4
    Join Date
    Apr 2009
    Location
    Japan
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    204

    Re: ThinkPad T410 Screen Brightness

    Do you mind opening a bug on launchpad to troubleshoot the issue? The model is very new.

    https://bugs.launchpad.net/ubuntu/+filebug/?no-redirect

    There is an unrelated bug report with an Intel Corporation Core Processor Integrated Graphics Controller

    https://bugs.launchpad.net/ubuntu/+s...el/+bug/518201

    Nothing about FN keys/panel applet (+nvidia card) not working so far

    Workaround: can you change the brightness either entering the BIOS menu at boot-time, either entering a tty console after log-in to GNOME?

    Enter a console
    Code:
    Ctrl+Alt+F2
    Exit the console
    Code:
    Ctrl+Alt+F7

  5. #5
    Join Date
    Jun 2010
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    6

    Re: ThinkPad T410 Screen Brightness

    I have the same problem (brightness function keys display an onscreen applet that ramps a brightness display up and down, but has no effect on the actual screen brightness). System: Ubuntu 10.04 on Lenovo T410 core i5 with nVidia NV34 graphics (GeForce FX 5200); nVidia proprietary drivers.

    I can confirm that the workaround (switch to a console with CTRL/ALT/F1, adjust brightness, switch back with CTRL/ALT/F7) works just fine. Many thanks for that.

  6. #6
    Join Date
    Nov 2006
    Beans
    1

    Re: ThinkPad T410 Screen Brightness

    Same problem here, started when I installed the nvidia proprietary driver. Running 10.4 on T410. The switch to console, change brightness, switch back trick works, but is pretty annoying.

  7. #7
    Join Date
    Oct 2011
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    5

    Re: ThinkPad T410 Screen Brightness

    Quote Originally Posted by steve0921 View Post
    I am having this problem too, since activating the nvidia proprietary drivers. Brightness worked fine before I did so.
    Hi,
    I am trying to troubleshoot brightness control on an iMac with the same graphic card as the t410. Could you tell me what driver you used before installing the nvidia drivers (they don't exist for ppc machines).
    Greg

  8. #8
    Join Date
    Nov 2007
    Location
    Happy Valley, OR
    Beans
    29
    Distro
    Ubuntu 12.10 Quantal Quetzal

    Re: ThinkPad T410 Screen Brightness

    Having a similar problem with a Thinkpad T530 in 12.10. There is no xorg.conf anymore so I can't apply that solution. Manually adding it didn't work either. Any other ideas?

  9. #9
    Join Date
    Sep 2010
    Location
    Germany
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    83
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: ThinkPad T410 Screen Brightness

    Try it this way (in German, but I hope you get the point).

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