Feedback on the Lenovo Thinkpad T510
The brightness controls of Lenovo laptops with NVIDIA NVS 3100M or Quadro FX 880M GPUs work while running Nouveau or when using a text mode VT, but not while running X and using proprietary NVIDIA drivers. It is possible to force the NVIDIA driver to control the backlight under X, but causes a buzzing sound that is not audible when using Nouveau. This issue has been reported numerous times over the past 18 months, including a bug filed with NVIDIA's bug reporting system that has received no official response.
More detailed reports and supporting information can be found in Launchpad bug 562005.
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Is a functional backlight necessary for a laptop to attain Ubuntu hardware certification?
Thank you.
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