我是这个世界的新手。所以F5/F6功能键基本上不起作用。我尝试了一些关于更改 grub 的在线解决方案，但没有运气。我发现 中没有文件/sys/class/backlight/，intel_backlight本身没有。
jing@jing-ThinkPad-E14-Gen-2:~$ sudo find /sys/ -type f -iname '*brightness*'
/sys/devices/platform/thinkpad_acpi/leds/platform::mute/brightness
/sys/devices/platform/thinkpad_acpi/leds/platform::mute/max_brightness
/sys/devices/platform/thinkpad_acpi/leds/tpacpi::thinklight/brightness
/sys/devices/platform/thinkpad_acpi/leds/tpacpi::thinklight/max_brightness
/sys/devices/platform/thinkpad_acpi/leds/tpacpi::power/brightness
/sys/devices/platform/thinkpad_acpi/leds/tpacpi::power/max_brightness
/sys/devices/platform/thinkpad_acpi/leds/tpacpi::standby/brightness
/sys/devices/platform/thinkpad_acpi/leds/tpacpi::standby/max_brightness
/sys/devices/platform/thinkpad_acpi/leds/tpacpi::thinkvantage/brightness
/sys/devices/platform/thinkpad_acpi/leds/tpacpi::thinkvantage/max_brightness
/sys/devices/platform/thinkpad_acpi/leds/tpacpi::kbd_backlight/brightness
/sys/devices/platform/thinkpad_acpi/leds/tpacpi::kbd_backlight/brightness_hw_changed
/sys/devices/platform/thinkpad_acpi/leds/tpacpi::kbd_backlight/max_brightness
/sys/devices/platform/thinkpad_acpi/leds/platform::micmute/brightness
/sys/devices/platform/thinkpad_acpi/leds/platform::micmute/max_brightness
/sys/devices/platform/i8042/serio0/input/input3/input3::numlock/brightness
/sys/devices/platform/i8042/serio0/input/input3/input3::numlock/max_brightness
/sys/devices/platform/i8042/serio0/input/input3/input3::capslock/brightness
/sys/devices/platform/i8042/serio0/input/input3/input3::capslock/max_brightness
/sys/devices/platform/i8042/serio0/input/input3/input3::scrolllock/brightness
/sys/devices/platform/i8042/serio0/input/input3/input3::scrolllock/max_brightness
/sys/devices/pci0000:00/0000:00:14.3/leds/phy0-led/brightness
/sys/devices/pci0000:00/0000:00:14.3/leds/phy0-led/max_brightness
/sys/module/video/parameters/hw_changes_brightness
/sys/module/video/parameters/brightness_switch_enabled
/sys/module/thinkpad_acpi/parameters/brightness_enable
/sys/module/thinkpad_acpi/parameters/brightness_mode
/sys/module/i915/parameters/invert_brightness
答案1
在找到合适的背光选项之前，您可以通过 调整伽玛值xrandr。用于xrandr --query从第二行的第一个条目获取显示器的名称，例如eDP，然后通过设置亮度
xrandr --output eDP --bightness 0.5
值从 0（“黑屏”）到 1（“正常”）再到 255（“为什么要这样做？”）
答案2
事实证明我需要更新内核（到5.8）才能识别图形驱动程序。这样就解决了问题。谢谢大家的建议。