Guest stritm0nkey Posted December 2, 2007 Report Share Posted December 2, 2007 hello, I m new on this forum but have used mandriva since 10.1 now. I just have some basic knowledge of linux. I have a sony fs980 laptop with mandriva 2008 on it. I use the new sony-laptop module which replaces sonypi. I have set the module to load at boot (and lsmod shows it does), and I have configured all the text files commanding the brightness (brightness, brightness_default...) to set the lowest brightness according to the manual found there : http://fxr.watson.org/fxr/source/Documenta...txt?v=linux-2.6 BUT, every time I boot the brightness is at its maximum . I can then go to the /sys/class/backlight/sony/brightness file to find that the zero value is written. When I save this file, the brightness comes to the minimum as it should be. I can also go in the configuration of Kpowersave, move the brightness cursor and it works. I also noticed that when I do some other things, the brightness increases to the maximum unexpectedly. Among others : when I watch a video in firefox with mplayer or when I modify some items in the KDE control center (don t remember which ones). Then when I look into the brightness text file, it shows nothing or the right value(0in my case). Again, entering 0 and saving the file works. It feels like some other program was controling the brightness instead of the sony-laptop module. It is not sonypi because it is not loaded. Before when I didn t use sonypi or sony-laptop, at boot, I remember the brightness was the same as the one I set previously under windows. This problem is killing my eyes and it s annoying to reset the brightness as i want every time. If some experienced users know the reason of this, I would appreciate your help. Quote Link to comment Share on other sites More sharing options...
Guest tkitzky Posted January 6, 2008 Report Share Posted January 6, 2008 Are you running x86_64 (64-bit) version? I've been searching for the last week trying to figure out a similar problem with Ubuntu 7.10 64-bit on a Sony Vaio VGN-NR160 laptop. I have found the backlight and several other acpi controlled events, such as Fn keys, are handled by the "sony-laptop" kernel module. This module is included in kernels since 2.6.21.? But... I also found a post saying this module is not available for 64-bit architectures. This would explain why I can't find it in my package repositories. Anyways... good luck. Here are a few urls I found helpful. Also, if you are desperate, you can try installing package "xbacklight". Use a command like "xbacklight -set 50" to reduce backlight to 50%. It's not much use for you since you do have some control over the backlight. This is the only thing that works for me. http://www.leverkruid.eu/linux-laptop/index.html http://fxr.watson.org/fxr/source/Documenta...txt?v=linux-2.6 http://www.linux.it/~malattia/wiki/index.php/Sony-laptop Quote Link to comment Share on other sites More sharing options...
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