https://bugzilla.kernel.org/show_bug.cgi?id=42833
--- Comment #10 from lukacs.ben...@gmail.com 2012-03-19 19:09:19 --- (In reply to comment #8) > (In reply to comment #7) > > I run 'echo 5 > /sys/class/backlight/acpi_video0/brightness' but I get an > > error > > message again, that this directory doesn't exist, however it exists. In the > > "brightness" file there was a 0, I change it to 5, save it but nothing > > happend. > > Finally you are right, if I boot the system with "acpi_backlight=vendor" > > everything works fine. > > Please kindly list /sys/class/backlight to here: > > When REMOVED "acpi_backlight=vendor" > # ls /sys/class/backlight > > When ADD "acpi_backlight=vendor" > # ls /sys/class/backlight > > > And, > Please try the following 2 command when ADD "acpi_backlight=vendor": > > # echo 5 > /sys/class/backlight/acer-wmi/brightness > # echo 5 > /sys/class/backlight/intel_backlight/brightness > > Which one works to change brightness on your machine? > > Thanks This is the result of the "ls /sys/class/backlight" with "acpi_backlight=vendor": acer-wmi intel_backlight and without it: acpi_video0 intel_backlight And the second command change my brightness: echo 5 > /sys/class/backlight/intel_backlight/brightness, although the 5 is very small value, there is a very big number in the file, when I write 5 into it the screen turns blank. -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug. ------------------------------------------------------------------------------ This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure _______________________________________________ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
