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How to re-set backlight startup level on Acer Extensa

\015 How to re-set (factory default and/or store DAC) backlight startup level on an Acer Extensa 5230 (Intel GMA 4500 MHD) ? I use xandr command under linux, but the setup is loose at the next boot and the "black" screen return to "milk" color. \015\012I had asked to Intel, Intel has said to ask to Acer, I asked to Acer and Acer says "we don't give support to customer personalitation".\015\012There are no OSD function, no function key (only brightness), no white or black level, no BIOS function (release 1.36A).\015

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How to re-set backlight startup level on Acer Extensa


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