In the recent ubuntu 13.04 Beta 2, /sys/class/backlight/acpi_video0 did not exist anymore on my toshiba satellite Z930 (acpi_backlight=vendor is NOT set). Therefore I had to change the udev script proposed by @cmtsij like this:
diff --git a/etc/udev/rules.d/00-tosh-backlight.rules b/etc/udev/rules.d/00-tosh-backlight.rules new file mode 100644 index 0000000..dd38aa2 --- /dev/null +++ b/etc/udev/rules.d/00-tosh-backlight.rules @@ -0,0 +1 @@ +DEVPATH=="*/toshiba", SUBSYSTEM=="backlight", ACTION=="change", RUN+="/etc/udev/rules.d/tosh-backlight.sh" diff --git a/etc/udev/rules.d/tosh-backlight.sh b/etc/udev/rules.d/tosh-backlight.sh new file mode 100755 index 0000000..c7dc5b2 --- /dev/null +++ b/etc/udev/rules.d/tosh-backlight.sh @@ -0,0 +1,7 @@ +#!/bin/sh + +acpi_max=$(cat /sys/class/backlight/toshiba/max_brightness) +acpi_curr=$(cat /sys/class/backlight/toshiba/brightness) +intel_max=$(cat /sys/class/backlight/intel_backlight/max_brightness) +intel_curr=$(($intel_max*$acpi_curr/$acpi_max)) +echo $intel_curr > /sys/class/backlight/intel_backlight/brightness
In the recent ubuntu 13.04 Beta 2, /sys/class/ backlight/ acpi_video0 did not exist anymore on my toshiba satellite Z930 (acpi_backlight =vendor is NOT set). Therefore I had to change the udev script proposed by @cmtsij like this:
diff --git a/etc/udev/ rules.d/ 00-tosh- backlight. rules b/etc/udev/ rules.d/ 00-tosh- backlight. rules rules.d/ 00-tosh- backlight. rules ="*/toshiba" , SUBSYSTEM= ="backlight" , ACTION=="change", RUN+="/ etc/udev/ rules.d/ tosh-backlight. sh" rules.d/ tosh-backlight. sh b/etc/udev/ rules.d/ tosh-backlight. sh rules.d/ tosh-backlight. sh backlight/ toshiba/ max_brightness) backlight/ toshiba/ brightness) backlight/ intel_backlight /max_brightness ) curr=$( ($intel_ max*$acpi_ curr/$acpi_ max)) backlight/ intel_backlight /brightness
new file mode 100644
index 0000000..dd38aa2
--- /dev/null
+++ b/etc/udev/
@@ -0,0 +1 @@
+DEVPATH=
diff --git a/etc/udev/
new file mode 100755
index 0000000..c7dc5b2
--- /dev/null
+++ b/etc/udev/
@@ -0,0 +1,7 @@
+#!/bin/sh
+
+acpi_max=$(cat /sys/class/
+acpi_curr=$(cat /sys/class/
+intel_max=$(cat /sys/class/
+intel_
+echo $intel_curr > /sys/class/