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!
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:  Vendor Specific Information: Len=0c <?> Capabilities:  Express Root Complex Integrated Endpoint, MSI 00 Capabilities: [ac] MSI: Enable+ Count=1/1 Maskable- 64bit- Capabilities: [d0] Power Management version 2 Capabilities:  #1b Capabilities:  Address Translation Service (ATS) Capabilities:  #13 Kernel driver in use: i915 Kernel modules: i915