I started reading drivers/platform/x86/toshiba_acpi.c to see if any obvious problems jump out at me. (None so far.) However, one strange thing that I noticed is that, while I can adjust my screen brightness by echoing values to /sys/devices/platform/toshiba_acpi/backlight/toshiba/brightness (when I can adjust the brightness at all), rmmoding toshiba_acpi doesn't have any effect on the operation of the brightness buttons, or on the other brightness files in /sys (/sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-LVDS-1/intel_backlight/brightness, /sys/devices/pci0000:00/0000:00:02.0/backlight/acpi_video0/brightness, /sys/devices/pci0000:00/0000:00:1c.0/0000:01:00.0/leds/mmc0::/brightness, /sys/devices/pci0000:00/0000:00:1c.2/0000:04:00.0/leds/phy0-led/brightness)
Since I can't control the brightness through any of the /sys/*/brightness files after a suspend/resume, I've decided to focus on the kernel side of things and most-ignore the GUI -- the problem must be with this system. But, since the toshiba_acpi module seems to be simultaneously involved and not involved, in setting the brightness, it's clear that I really don't understand how all of the ACPI and other firmware/chipset modules that can control the brightness interact. Can anyone point me to documentation about how this is supposed to work? Thanks, -Luke -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/832483 Title: Toshiba R835-P56X - screen brightness control does not work after suspend/resume To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/832483/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
