On Friday 21 August 2009 17:04:43 Boyd Stephen Smith Jr. wrote: > In <200908211043.44820.tchate...@free.fr>, Thierry Chatelet wrote: SNIP > >I found that: > >~$ dmesg |grep brightness > >[ 26.758710] ACPI Error (video-0537): Current brightness invalid > > [20090320] > > That looks like either the kernel is reading from the wrong place or the > hardware is providing the wrong value. You might want to follow up with > some kernel hackers. > > >What to do now? > > You might try reading/setting some of these values: > /sys/devices/virtual/backlight/acpi_video0/brightness > /sys/devices/virtual/backlight/acpi_video0/actual_brightness > /sys/devices/virtual/backlight/acpi_video0/max_brightness > /sys/module/video/parameters/brightness_switch_enabled > > Perhaps it will work if your brightness is less than the max_brightness.
I don't have a backlight folder there!! As for brightness_switch_enabled, it says "y", so i guess it's OK. When the laptop starts, it seems to me that the brightness is set as a random value, sometime very bright, sometimes very dime. I searched that: dmesg |grep video [ 7.017030] acer-wmi: Brightness must be controlled by generic video driver [ 26.973449] ACPI Error (video-0537): Current brightness invalid [20090320] A web search on acer-wmi gave me: http://www.mjmwired.net/kernel/Documentation/laptops/acer-wmi.txt where the developer ask for direct information from people having trouble with this module. So I will contact him directly and let the list know about the outcome. Thank you Thierry -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
