Thread: screen brightness on HP dv7

i have dv7-6b78us , screen brightness keys weren't working. i'll posting success getting going here. have temporary workaround.

none of threads read quite accurate respect hybrid graphic card setup on laptop, here's workaround worked me.

set brightness @ 50%

code:

echo 2000 | sudo tee /sys/class/backlight/intel_backlight/brightness

set brightness max

code:

cat /sys/class/backlight/intel_backlight/max_brightness | sudo tee /sys/class/backlight/intel_backlight/brightness

even though installed radeon drivers, intel graphics card on default well, hence have use that.

once figure out how bind actual fn-f2 , fn-f3 keys increase , decrease brightness i'll post here. i'll working on getting graphics cards behave well.

i found better solution.

run in terminal:

code:

sudo nano /etc/default/grub

and change line:

code:

grub_cmdline_linux=""

to:

code:

grub_cmdline_linux="acpi_backlight=vendor"

save file , run:

code:

sudo update-grub

now reboot. function keys brightness should work.

Forum The Ubuntu Forum Community Ubuntu Official Flavours Support Hardware [SOLVED] screen brightness on HP dv7

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