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My computer used to boot with zero backlight but i found a solution which is to put sudo setpci -s 00:02.0 F4.B=00 in rc.local.
But the problem is Everytime i suspend or lock my pc, the zero backlight problem comes again and I have type the command again which is a pain in the a**
Is there a permanent solution or workaround to it
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Try "laptop-mode-tools" available in Software Manager. This program can be configured to resolve most power management problems.
Info for configuring is here: http://samwel.tk/laptop_mode/
Mint 17 Cinnamon 64bit
Dell Inspiron 15R(N5110) Intel i7-2670QM, 4GB DDR3 1333Mhz, Intel 6 Express HM67
GeForce GT525M, 500G SATA, 15.6" HD 1366x768 Optimus on Bumblebee
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