http://bugzilla.kernel.org/show_bug.cgi?id=13121
--- Comment #64 from Alain Tavan <alai...@gmail.com> 2009-08-03 06:31:57 ---
i don't now if i did things right (i don't want to compile the complete kernel,
so i simply modify the video.c file)
i applied the patch on comment 41
also changed the name of the author (to see if the new driver is loaded)
saved
in the directory "/usr/src/linux-source-2.6.31/drivers/acpi/"
i moved the Makefile to Makefile.old
and created a new one with following content
obj-m += video.o
all:
make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules
clean:
make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean
then i did a make in the /usr/src/linux-source-2.6.31/drivers/acpi/ directory
(to only build the video.ko driver)
i copy video.ko in /lib/modules/2.6.31-4-generic/kernel/drivers/acpi/ (insmod
is not working because driver is in use)
i reboot and checked if the driver changed with modinfo video
the author name changed (so i guess i'm with the modified driver)
cat /proc/acpi/video/*/*/brightness
<not supported>
<not supported>
<not supported>
<not supported>
<not supported>
r...@ubuntu:/home/alain# echo 3 > /sys/backlight/acpi_video0/brightness
bash: /sys/backlight/acpi_video0/brightness: No such file or directory
r...@ubuntu:/home/alain# cat /proc/acpi/video/*/*/brightness
<not supported>
<not supported>
<not supported>
<not supported>
<not supported>
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