Jowi wrote in comment #29: "I tried to work around with the acpi_backlight=vendor kernel parameter. To my surprise with this parameter set intel_backlight seems to be used behind the scenes when the Fn-F6/7 keys are pressed. But after resume the backlight stayed off, hence I don't followed this approach any further."
Actually it seems that following this approach just a little further yields a passable solution. It seems that with acpi_backlight=vendor the backlight is off after a suspend, but it can be turned back on by writing to /sys/class/backlight/toshiba/brightness, and then everything works normally again. To all those suffering from this bug: there are instructions at http://www.linlap.com/wiki/toshiba+portege+z830-10f that explain how to enable the acpi_backlight=vendor option and set things up with a script that restores the backlight on resume. This fixes the problem for me on my R830. -- 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: Various Toshiba laptops - brightness controls work on first boot, but do nothing after suspend/resume to RAM. To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/935778/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
