Fix segfault on older kernels when trying to read brightness from backlight class
treedcb37662373a7851071269c85c940d40fdb02544
-rw-r--r-- 2458 ChangeLog
-rw-r--r-- 1780 Makefile
-rw-r--r-- 1547 NEWS
-rw-r--r-- 3796 README
-rw-r--r-- 40360 acer_acpi.c