BUG : brightness issue after installation of Ubuntu 12.04.5 on Lenovo X240

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​Hi Everybody,

​At booting time after a fresh install of ubuntu 12.04.5 on a Lenovo X240, the dmesg displayed on screen this message :

[    7.289372] thinkpad_acpi: http://ibm-acpi.sf.net/
[    7.290001] thinkpad_acpi: Unsupported brightness interface, please contact ibm-acpi-devel@xxxxxxxxxxxxxxxxxxxxx

​So I send you this message accordingly to the system debug message on ubuntu.

Please acknowledge this email.



Yours Sincerely

YE David
+33 (0)629 931 515
​WeChat, 微信, Naver Line & Skype id: yexindao
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