Thank you for your bug report and the additional info you've provided. I'm marking it as duplicate of bug 217504, which is about acpi_fakekey failing/being ignored, which gets called in /etc/acpi/video_brightnessup.sh.
Thank you for your bug report and the additional info you've provided. video_brightnes sup.sh.
I'm marking it as duplicate of bug 217504, which is about acpi_fakekey failing/being ignored, which gets called in /etc/acpi/