Re: Brightness control not working
Hello. Thank you for the tipp, but it is not working in my case. Like stlouis71, I have an Acer AOD270 netbook, but with Fedora 17 xfce4. The graphic card is Intel GMA 3600. Like in stlouis71's case, everything works ok (except that sometimes computer strangely slows a bit) but I can not reduce screen brightness.
When I press Fn+brightness keys, the scale appears on my display and it changes, but this has no effect on the brightness itself. The same buttons for sound work without a problem.
I found some suggestions, tried them without success, so i would like to list them.
I tried the method with adding acpi_backlight=vendor and acpi_osi=Linux to /etc/default/grub (which is often suggested and it, apparently, works for many people) but for me it does not do the trick.
There is one other way that people suggest: echo 4 > /sys/class/backlight/acpi_video0/brightness. This does not work in my case, since I do not have the file in question. This works, however, for Acer Aspire 5749.
Furthermore, I found the following suggestion: adding following line to xorg.conf should help: Option "RegistryDwords" "EnableBrightnessControl=1". I am not able to find the mentioned file (xorg.conf). I searched it with find / -name '*xorg.conf*' but I did not find it (Xorg.conf neither).
I am running out of options. I have been trying for some time now, and still no luck. Can anyone help? Since I am not a Linux expert and since I am avare that this description could be better, I will gladly clarify or expand any part of this post (if I can).