我在我的 Packard Bell EasyNote TX86（Intel HD Graphics，Core i5）上使用 Arch Linux，我无法控制背光（它总是在最大）。xbacklight 和写入 /sys/class/backlight 什么都不做。我试过
xrandr --output LVDS --set BACKLIGHT_CONTROL native
但它对 X 进行了段错误
Backtrace:
[ 308.398] 0: /usr/bin/X (xorg_backtrace+0x3b) [0x80e685b]
[ 308.398] 1: /usr/bin/X (0x8048000+0x64895) [0x80ac895]
[ 308.398] 2: (vdso) (__kernel_rt_sigreturn+0x0) [0xb770140c]
[ 308.398] 3: /usr/bin/X (0x8048000+0xbe860) [0x8106860]
[ 308.398] 4: /usr/bin/X (0x8048000+0x23e57) [0x806be57]
[ 308.398] 5: /usr/bin/X (0x8048000+0x1a135) [0x8062135]
[ 308.398] 6: /lib/libc.so.6 (__libc_start_main+0xe6) [0xb7442c76]
[ 308.398] 7: /usr/bin/X (0x8048000+0x19d11) [0x8061d11]
[ 308.398] Segmentation fault at address 0x48
[ 308.398] …