I'm new to ubuntu and my Asus X555LA brought me here.
(brightness up/brightness down) is not working, i did some search and what i tried till now is modifying
grub file from
GRUB_CMDLINE_LINUX="acpi_osi=Linux" GRUB_CMDLINE_LINUX="acpi_backlight=vendor" GRUB_CMDLINE_LINUX="acpi_osi=linux acpi_backlight=vendor" GRUB_CMDLINE_LINUX="acpi_osi_Linux"
fn+brightness works in BIOS and i use ubuntu 15.10 but the same problem is in 14.04 or 14.10.
Now is there any other solution? And if there is please can you explain it on baby steps :-?
product: Intel(R) Core(TM) i3-5010U CPU @ 2.10GHz vendor: Intel Corp. physical id: 1 bus info: cpu@0 size: 2100MHz capacity: 2100MHz width: 64 bits
description: VGA compatible controller product: Broadwell-U Integrated Graphics vendor: Intel Corporation physical id: 2 bus info: pci@0000:00:02.0 version: 09 width: 64 bits clock: 33MHz capabilities: msi pm vga_controller bus_master cap_list rom configuration: driver=i915 latency=0 resources: irq:48 memory:b1000000-b1ffffff memory:c0000000-cfffffff ioport:4000(size=64)
PS: I did found xbacklight app with custom keys, but the fact that fn on brightness doesn't work bugs me.