Comment 76 for bug 1163720

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Kamal Mostafa (kamalmostafa) wrote :

I have prepared a test kernel for saucy and raring that may help Dell XPS13 systems which experience black screen on boot and non-functional backlight controls. (In particular, this case has been reported when UEFI BIOS is enabled on XPS13's). This test kernel is _only_ relevant for XPS13's.

See http://zinc.canonical.com/~kamal/xps13-pch-bootparam/ and follow the instructions in the README. (IMPORTANT: In addition to installing the test kernel, you must enable the fix with a boot parameter, as the README explains).

Please provide feedback here regarding whether the test kernel and boot parameter helps you XPS13 backlight.