Hi, I improved the /etc/udev/rules.d/tosh-backlight.sh script as presented in https://bugs.launchpad.net/ubuntu/+source/linux/+bug/935778/comments/68, this script avoids the no-backlight at all issue and sets the brightness using a quadratic function (it works much better in my Z830 where the lower brightness jumps are very big).
#!/bin/sh acpi_max=$(cat /sys/class/backlight/toshiba/max_brightness) acpi_curr=$(cat /sys/class/backlight/toshiba/brightness) intel_max=$(cat /sys/class/backlight/intel_backlight/max_brightness) intel_min=100 # What we want the brightness 0 to be # Linear #intel_curr=$((($intel_max-$intel_min)/$acpi_max*$acpi_curr+$intel_min)) # Cuadratic intel_curr=$(echo "scale=10; ($intel_max-$intel_min)/($acpi_max^2)*$acpi_curr^2+$intel_min" | bc | cut -d. -f1) echo $intel_curr > /sys/class/backlight/intel_backlight/brightness -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/935778 Title: Toshiba Tecra R840 - brightness controls work on first boot, but do nothing after suspend/resume To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/935778/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
