I have one problem that I was not able to fix on my Lenovo Flex 1480. The problem is my brightness control. My brightness keyboard control aren't working.
I have tried many of the solutions on the Web and nothing has worked so far.
I have written a conf file which looks like this :
Section "Device"
Identifier "card0"
Driver "intel"
Option "AccelMethod" "sna"
Option "Backlight" "intel_backlight"
BusID "PCI:0:2:0"
EndSection
Then I have changed /etc/default/grub to have acpi_backlight=vendor
which hasn't made a change.
I have tried xbacklight, but nothing seems to work with it. I am getting a Xrandr error.
Well, this is my last hope to make this work! Thanks guys for any suggestions or help! I have hope in this community!
P.S
this is what comes out of lspci -v | grep -i -A 15 vga
00:02.0 VGA compatible controller: Intel Corporation HD Graphics 520 (rev 07) (prog-if 00 [VGA controller])
Subsystem: Lenovo HD Graphics 520
Flags: bus master, fast devsel, latency 0, IRQ 278
Memory at d0000000 (64-bit, non-prefetchable) [size=16M]
Memory at c0000000 (64-bit, prefetchable) [size=256M]
I/O ports at e000 [size=64]
[virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
Capabilities: [40] Vendor Specific Information: Len=0c <?>
Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00
Capabilities: [ac] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [d0] Power Management version 2
Capabilities: [100] #1b
Capabilities: [200] Address Translation Service (ATS)
Capabilities: [300] #13
Kernel driver in use: i915
Kernel modules: i915