Matt White, as per http://download.lenovo.com/express/ddfm.html an
update is available for your BIOS (2.53). If you update to this
following https://help.ubuntu.com/community/BiosUpdate , does it change
anything?
If not, could you please both specify what happened, and provide the output of
the
To answer Matt's question, yes, it is up to the nVidia driver to control
the brightness control.
I've a T530 running Fedora and the backlit display works after resume.
I'm using the nVidia proprietary driver and added the following line
under the Device section in the Xorg conf file
Sorry for the delayed response. Fn+Space turns the keyboard backlight and
Thinklight on, but does nothing for the screen brightness. Please also see
this report: https://bugzilla.kernel.org/show_bug.cgi?id=51131
Aaron at the end says we're depending on Nvidia for brightness control. Is
this true?
I have the same problem with a T520 on 12.04.
A workaround is to switch to a virtual text console (e.g.
Control+Alt+1), change the brightness there, and switch back
(Control+Alt+7).
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Matt, can you do me a favor please.. Try pressing Fn+Space a couple of
times.
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Title:
Brightness control doesn't work on Lenovo Thinkpad T530
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Title:
Brightness
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Title:
Brightness
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Title:
Brightness
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Title:
Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v3.7 kernel[0] (Not a kernel in the daily directory) and install both
the linux-image and linux-image-extra .deb packages.
If this bug is fixed in the
Also, unfortunately the Nvidia driver is proprietary, so the may not be
much that can be done if the upstream kernel still contains this bug.
Something you can look at is the bumblebee project:
http://www.bumblebee-project.org/
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I can try the new kernel, yes. Also, I have tried the Noveau driver as
well as the Nvidia driver, so I don't think it's a problem with the
driver.
I noticed this interesting output from dmesg - any suggestions after
looking over it? Thanks so much for looking at this issue with me.
One additional question, do you know if there was a prior Ubuntu release
that did not have this bug?
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Title:
Brightness control doesn't work on
Just tried on Quantal 3.5.7 and 3.6.3 and same result. I am not aware if
a prior release had this issue or not as this is a brand new laptop and
I installed 12.10 on it.
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This issue also appears to be an upstream bug, since you tested the
latest upstream kernel. Would it be possible for you to open an
upstream bug report[0]? That will allow the upstream Developers to
examine the issue, and may provide a quicker resolution to the bug.
Please follow the
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