Wednesday, July 20, 2011

Fedora 15 on Acer Aspire 5742 : Display Brightness (backlight)

# cd /boot/grub
# cp grub.conf grub.conf.orig
# vim grub.conf

Modify the kernel line by adding acpi_backlight=vendor acpi_osi=Linux at the end.

title Fedora (2.6.38.8-35.fc15.x86_64)
    root (hd0,2)
    kernel /vmlinuz-2.6.38.8-35.fc15.x86_64 ro root=/dev/mapper/vg_aspire-lv_root rd_LUKS_UUID=luks-5dbe04ae-e4be-4eca-848b-bba399c312df rd_LVM_LV=vg_aspire/lv_root rd_LVM_LV=vg_aspire/lv_swap rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYTABLE=uk rhgb quiet acpi_backlight=vendor acpi_osi=Linux
    initrd /initramfs-2.6.38.8-35.fc15.x86_64.img

# /sbin/reboot