Hi Alex, FYI, kernel build failed on tree: git://people.freedesktop.org/~airlied/linux.git drm-next head: 268d28371cd326be4dfcd7eba5917bf4b9d30c8f commit: 37e9b6a62fb775276f8edb5bd2b9f13a3102b9dd [148/301] drm/radeon: rework the backlight control to be an asic callback config: ia64-defconfig All error/warnings: ERROR: "atombios_set_backlight_level" [drivers/gpu/drm/radeon/radeon.ko] undefined! ERROR: "radeon_legacy_set_backlight_level" [drivers/gpu/drm/radeon/radeon.ko] undefined! ERROR: "backlight_force_update" [drivers/gpu/drm/radeon/radeon.ko] undefined! --- 0-DAY kernel build testing backend Open Source Technology Center Fengguang Wu, Yuanhan Liu Intel Corporation -- To unsubscribe from this list: send the line "unsubscribe kernel-janitors" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html