When using the nouveau driver, there is a folder in /sys/class/backlight/nv_backlight/ which contains the max_brightness (1025) and brightness as expected. After digging around a bit, in the kernel source I found these lines of code:
/* We do not have any information about which values are allowed, thus we used safe values */ #define MIN_LEVEL 0x158 (344 decimal) #define MAX_LEVEL 0x534 (1332 in decimal) In the file linux/drivers/video/nvidia/nv_backlight.c (picked up from apt-get source linux-2.6) Based on the filename and how close those numbers are to 1025, I would guess that this is the code determining my max brightness. More like hoping, than guessing really. Can anyone provide any insight about this, perhaps? Might hacking this file with a kernel recompile change the max_brightness? Thanks, Matt On Fri, Nov 12, 2010 at 1:16 PM, Camaleón <noela...@gmail.com> wrote: > On Fri, 12 Nov 2010 08:51:39 -0500, Matt Simmons wrote: > > > I am running Squeeze on my laptop: a macbook pro 7,1.Most is going well, > > except the backlight screen brightness. Using the nouveau driver (this > > laptop has a 320M), it sets my max_brightness to 1025 according to > > /sys/. Unfortunately, a brightness of 1025 is extremely dim, and > > supposedly the brightness should be more like 40,000 on this guy. > > Anyway, installing the NVidia proprietary driver yields strange results > > (download from NVidia, not debian repos), there is nothing in the folder > > /sys/class/backlight at all! Kernel 2.6.32-5 amd64. > > Maybe related to this (message #25)? > > pommed: brightness control no longer working on macbook pro > http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=591264 > > Greetings, > > -- > Camaleón > > > -- > To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org > with a subject of "unsubscribe". Trouble? Contact > listmas...@lists.debian.org > Archive: http://lists.debian.org/pan.2010.11.12.18.16...@gmail.com > >
