因此我在 2011 版 MacAir 上安装了 Ubuntu 14.04，但遇到了一个常见问题，就是要么全屏亮，要么完全黑，没有中间选项。
我安装了亮度指示器来解决这个问题，它工作得很好，让我可以小幅度调整亮度。但有趣的是，如果我打开和关闭盖子（那是暂停，对吧？），它就会停止工作，我又回到原点，要么全亮，要么没有亮度。但如果我重新启动，指示器就会再次工作。
我尝试了一些修复方法，其中最值得注意的是这里，尽管事实并非如此确切地我遇到的问题。我也试过这，但无济于事。
如果有帮助，ls /sys/class/backlight请给予acpi_video0和intel_backlight。
以下是输出cat /boot/grub/grub.cfg：
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#
### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
set have_grubenv=true
load_env
fi
if [ "${next_entry}" ] ; then
set default="${next_entry}"
set next_entry=
save_env next_entry
set boot_once=true
else
set default="0"
fi
if [ x"${feature_menuentry_id}" = xy ]; then
menuentry_id_option="--id"
else
menuentry_id_option=""
fi
export menuentry_id_option
if [ "${prev_saved_entry}" ]; then
set saved_entry="${prev_saved_entry}"
save_env saved_entry
set prev_saved_entry=
save_env prev_saved_entry
set boot_once=true
fi
function savedefault {
if [ -z "${boot_once}" ]; then
saved_entry="${chosen}"
save_env saved_entry
fi
}
function recordfail {
set recordfail=1
if [ -n "${have_grubenv}" ]; then if [ -z "${boot_once}" ]; then save_env recordfail; fi; fi
}
function load_video {
if [ x$feature_all_video_module = xy ]; then
insmod all_video
else
insmod efi_gop
insmod efi_uga
insmod ieee1275_fb
insmod vbe
insmod vga
insmod video_bochs
insmod video_cirrus
fi
}
if [ x$feature_default_font_path = xy ] ; then
font=unicode
else
insmod part_gpt
insmod ext2
set root='hd0,gpt4'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt4 --hint-efi=hd0,gpt4 --hint-baremetal=ahci0,gpt4 614738a7-a951-4c02-8051-db3c7901525b
else
search --no-floppy --fs-uuid --set=root 614738a7-a951-4c02-8051-db3c7901525b
fi
font="/usr/share/grub/unicode.pf2"
fi
if loadfont $font ; then
set gfxmode=auto
load_video
insmod gfxterm
set locale_dir=$prefix/locale
set lang=en_US
insmod gettext
fi
terminal_output gfxterm
if [ "${recordfail}" = 1 ] ; then
set timeout=-1
else
if [ x$feature_timeout_style = xy ] ; then
set timeout_style=hidden
set timeout=0
# Fallback hidden-timeout code in case the timeout_style feature is
# unavailable.
elif sleep --interruptible 0 ; then
set timeout=0
fi
fi
### END /etc/grub.d/00_header ###
### BEGIN /etc/grub.d/05_debian_theme ###
set menu_color_normal=white/black
set menu_color_highlight=black/light-gray
if background_color 44,0,30,0; then
clear
fi
### END /etc/grub.d/05_debian_theme ###
### BEGIN /etc/grub.d/10_linux ###
function gfxmode {
set gfxpayload="${1}"
if [ "${1}" = "keep" ]; then
set vt_handoff=vt.handoff=7
else
set vt_handoff=
fi
}
if [ "${recordfail}" != 1 ]; then
if [ -e ${prefix}/gfxblacklist.txt ]; then
if hwmatch ${prefix}/gfxblacklist.txt 3; then
if [ ${match} = 0 ]; then
set linux_gfx_mode=keep
else
set linux_gfx_mode=text
fi
else
set linux_gfx_mode=text
fi
else
set linux_gfx_mode=keep
fi
else
set linux_gfx_mode=text
fi
export linux_gfx_mode
menuentry 'Ubuntu' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-614738a7-a951-4c02-8051-db3c7901525b' {
recordfail
load_video
gfxmode $linux_gfx_mode
insmod gzio
insmod part_gpt
insmod ext2
set root='hd0,gpt4'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt4 --hint-efi=hd0,gpt4 --hint-baremetal=ahci0,gpt4 614738a7-a951-4c02-8051-db3c7901525b
else
search --no-floppy --fs-uuid --set=root 614738a7-a951-4c02-8051-db3c7901525b
fi
linux /boot/vmlinuz-3.13.0-43-generic.efi.signed root=UUID=614738a7-a951-4c02-8051-db3c7901525b ro quiet splash pcie_aspm=force acpi_osi=Linux acpi_backlight=vendor quiet splash acpi_backlight=vendor $vt_handoff
initrd /boot/initrd.img-3.13.0-43-generic
}
submenu 'Advanced options for Ubuntu' $menuentry_id_option 'gnulinux-advanced-614738a7-a951-4c02-8051-db3c7901525b' {
menuentry 'Ubuntu, with Linux 3.13.0-43-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.13.0-43-generic-advanced-614738a7-a951-4c02-8051-db3c7901525b' {
recordfail
load_video
gfxmode $linux_gfx_mode
insmod gzio
insmod part_gpt
insmod ext2
set root='hd0,gpt4'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt4 --hint-efi=hd0,gpt4 --hint-baremetal=ahci0,gpt4 614738a7-a951-4c02-8051-db3c7901525b
else
search --no-floppy --fs-uuid --set=root 614738a7-a951-4c02-8051-db3c7901525b
fi
echo 'Loading Linux 3.13.0-43-generic ...'
linux /boot/vmlinuz-3.13.0-43-generic.efi.signed root=UUID=614738a7-a951-4c02-8051-db3c7901525b ro quiet splash pcie_aspm=force acpi_osi=Linux acpi_backlight=vendor quiet splash acpi_backlight=vendor $vt_handoff
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-3.13.0-43-generic
}
menuentry 'Ubuntu, with Linux 3.13.0-43-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.13.0-43-generic-recovery-614738a7-a951-4c02-8051-db3c7901525b' {
recordfail
load_video
insmod gzio
insmod part_gpt
insmod ext2
set root='hd0,gpt4'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt4 --hint-efi=hd0,gpt4 --hint-baremetal=ahci0,gpt4 614738a7-a951-4c02-8051-db3c7901525b
else
search --no-floppy --fs-uuid --set=root 614738a7-a951-4c02-8051-db3c7901525b
fi
echo 'Loading Linux 3.13.0-43-generic ...'
linux /boot/vmlinuz-3.13.0-43-generic.efi.signed root=UUID=614738a7-a951-4c02-8051-db3c7901525b ro recovery nomodeset quiet splash pcie_aspm=force acpi_osi=Linux acpi_backlight=vendor
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-3.13.0-43-generic
}
menuentry 'Ubuntu, with Linux 3.13.0-32-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.13.0-32-generic-advanced-614738a7-a951-4c02-8051-db3c7901525b' {
recordfail
load_video
gfxmode $linux_gfx_mode
insmod gzio
insmod part_gpt
insmod ext2
set root='hd0,gpt4'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt4 --hint-efi=hd0,gpt4 --hint-baremetal=ahci0,gpt4 614738a7-a951-4c02-8051-db3c7901525b
else
search --no-floppy --fs-uuid --set=root 614738a7-a951-4c02-8051-db3c7901525b
fi
echo 'Loading Linux 3.13.0-32-generic ...'
linux /boot/vmlinuz-3.13.0-32-generic.efi.signed root=UUID=614738a7-a951-4c02-8051-db3c7901525b ro quiet splash pcie_aspm=force acpi_osi=Linux acpi_backlight=vendor quiet splash acpi_backlight=vendor $vt_handoff
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-3.13.0-32-generic
}
menuentry 'Ubuntu, with Linux 3.13.0-32-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.13.0-32-generic-recovery-614738a7-a951-4c02-8051-db3c7901525b' {
recordfail
load_video
insmod gzio
insmod part_gpt
insmod ext2
set root='hd0,gpt4'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt4 --hint-efi=hd0,gpt4 --hint-baremetal=ahci0,gpt4 614738a7-a951-4c02-8051-db3c7901525b
else
search --no-floppy --fs-uuid --set=root 614738a7-a951-4c02-8051-db3c7901525b
fi
echo 'Loading Linux 3.13.0-32-generic ...'
linux /boot/vmlinuz-3.13.0-32-generic.efi.signed root=UUID=614738a7-a951-4c02-8051-db3c7901525b ro recovery nomodeset quiet splash pcie_aspm=force acpi_osi=Linux acpi_backlight=vendor
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-3.13.0-32-generic
}
}
### END /etc/grub.d/10_linux ###
### BEGIN /etc/grub.d/20_linux_xen ###
### END /etc/grub.d/20_linux_xen ###
### BEGIN /etc/grub.d/20_memtest86+ ###
### END /etc/grub.d/20_memtest86+ ###
### BEGIN /etc/grub.d/30_os-prober ###
### END /etc/grub.d/30_os-prober ###
### BEGIN /etc/grub.d/30_uefi-firmware ###
### END /etc/grub.d/30_uefi-firmware ###
### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries. Simply type the
# menu entries you want to add after this comment. Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###
### BEGIN /etc/grub.d/41_custom ###
if [ -f ${config_directory}/custom.cfg ]; then
source ${config_directory}/custom.cfg
elif [ -z "${config_directory}" -a -f $prefix/custom.cfg ]; then
source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###
下面是lspci | grep VGA：
00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated Graphics Controller (rev 09)
答案1
我也遇到了同样的问题。只需/etc/default/grub.cfg以 root 身份打开文件，然后找到类似以下内容的行：
GRUB_CMDLINE_LINUX="............"
并将以下行粘贴到双引号中：
acpi_osi= vconsole.font=latarcyrheb-sun16 $([ -x /usr/sbin/rhcrashkernel-param ] && /usr/sbin/rhcrashkernel-param || :) rd.luks=0 rd.lvm=0 rd.md=0 rd.dm=0
并运行：
sudo grub-mkconfig -o /boot/grub/grub.cfg
重启后更改生效。
编辑 ：
解决方案2：
如果不存在，则使用以下命令创建目录 /etc/X11/xorg.conf.d/：
sudo mkdir /etc/X11/xorg.conf.d
并将以下内容复制粘贴到终端中：
echo -e ' Section "Device"\n\tIdentifier "Intel Graphics"\n\tDriver "intel"\n\tBusID "PCI:0:2:0"\n\tOption "Backlight" "intel_backlight"\n EndSection' | sudo tee /etc/X11/xorg.conf.d/20-intel.conf
重新启动 X 会话或重新启动并查看问题是否已解决。
答案2
这里提供了有关修复 Ubuntu 14.04 中亮度问题的说明：http://itsfoss.com/fix-brightness-ubuntu-1310/
这在 Ubuntu 中显然非常常见（亮度问题）。