I'm affected by the same bug on Toshiba Satellite laptop in Ubuntu 13.10
(kernel 3.11.0-14-generic). Tried adding acpi_backlight=vendor to grub,
but backlight keys still not working after suspend.
Is there a working workaround for this problem?
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You received this bug notification because you
Little-bit more details. The keys work, GUI changes and the value in
/sys/class/backlight/toshiba/brightness changes from 0 to 7 when
changing brightness, however there is no real effect on screen
brightness. There is also
/sys/class/backlight/intel_backlight/brightness file, which is not
affected
