unable to change brightness settings in sony vaio e series laptop
- by yashwanth
I am using Sony Vaio E Series VPCEH25EN laptop.
I installed ubuntu 12.04 64 bit version and I couldn't change my brightness level.
Always it is showing max brightness,
I tried to change by using echo 0 | sudo tee /sys/class/backlight/acpi_video0/brightness command.
When I run the above cmd it showing output as 0 but there is no change in…
