Tested 3.10rc3. The problem remains. No change in behaviour whatsoever. I noticed that with Ubuntu 12.10 and hence the 3.5.0 kernel, adding acpi_backlight=vendor increased the number of brightness levels. With Ubuntu raring and the 3.8.0 kernel, this grub command no longer changes the number of levels. However, it is doing something, because if I remove this grub command, when I wake my computer from sleep, the brightness level goes up to maximum, whereas with the Grub command it is remembered.
A solution to me seems to make the brightness control associated with /sys/class/backlight/intel_backlight/brightness instead of /sys/class/backlight/toshiba/brightness. This would solve the problem but I don't have a clue how to produce such a change without using scripts, shortcuts associated with those scripts and setting the permissions for the file to 777 or something which allows the user to change the value without using sudo. ** Tags added: kernel-bug-exists-upstream-v3.10-rc3 ** Tags removed: needs-upstream-testing -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1069144 Title: [Toshiba Satellite R830] brightness control works until sleep To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1069144/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
