xrandr(1)

Question

我正在运行 FreeBSD 11RC2，当前 Nvidia 驱动程序版本为 367.44，并使用启动时加载的 nvidia-modeset 内核模块

/etc/rc.conf

文件通过添加

kld_list="nvidia-modeset"

这是我的 GPU 信息

vgapci0@pci0:1:0:0: class=0x030000 card=0x0130106b chip=0x0fe910de rev=0xa1 hdr=0x00
    vendor     = 'NVIDIA Corporation'
    device     = 'GK107M [GeForce GT 750M Mac Edition]'
    class      = display
    subclass   = VGA
    cap 01[60] = powerspec 3  supports D0 D3  current D0
    cap 05[68] = MSI supports 1 message, 64 bit enabled with 1 message
    cap 10[78] = PCI-Express 2 endpoint max data 256(256) RO NS
                 link x8(x16) speed 8.0(8.0) ASPM L0s/L1(L0s/L1)
    cap 09[b4] = vendor (length 20)
    ecap 0002[100] = VC 1 max VC0
    ecap 0004[128] = Power Budgeting 1
    ecap 0001[420] = AER 2 0 fatal 0 non-fatal 0 corrected
    ecap 000b[600] = Vendor 1 ID 1
    ecap 0019[900] = PCIe Sec 1 lane errors 0

以下是该机器的 acpi 信息：http://paste2.org/LUcIwtzn

device  acpi
debug.acpi.resume_beep: 0
debug.acpi.batt.batt_sleep_ms: 0
debug.acpi.ec.timeout: 750
debug.acpi.ec.polled: 0
debug.acpi.ec.burst: 0
debug.acpi.cpu_unordered: 0
debug.acpi.suspend_bounce: 0
debug.acpi.reset_clock: 1
debug.acpi.default_register_width: 1
debug.acpi.interpreter_slack: 1
debug.acpi.enable_debug_objects: 0
debug.acpi.acpi_ca_version: 20160527
debug.acpi.max_threads: 3
debug.acpi.tasks_hiwater: 40
debug.acpi.max_tasks: 1024
hw.acpi.acline: 1
hw.acpi.battery.info_expire: 5
hw.acpi.battery.units: 1
hw.acpi.battery.state: 0
hw.acpi.battery.time: -1
hw.acpi.battery.life: 97
hw.acpi.cpu.cx_lowest: C2
hw.acpi.reset_video: 0
hw.acpi.handle_reboot: 1
hw.acpi.disable_on_reboot: 0
hw.acpi.verbose: 0
hw.acpi.s4bios: 0
hw.acpi.sleep_delay: 1
hw.acpi.suspend_state: S3
hw.acpi.standby_state: NONE
hw.acpi.lid_switch_state: NONE
hw.acpi.sleep_button_state: S3
hw.acpi.power_button_state: S5
hw.acpi.supported_sleep_state: S3 S4 S5
machdep.idle: acpi
machdep.idle_available: spin, mwait, hlt, acpi
machdep.acpi_root: 2061033492
machdep.acpi_timer_freq: 3579545
dev.acpi_perf.7.%parent: cpu7
dev.acpi_perf.7.%pnpinfo: 
dev.acpi_perf.7.%location: 
dev.acpi_perf.7.%driver: acpi_perf
dev.acpi_perf.7.%desc: 
dev.acpi_perf.6.%parent: cpu6
dev.acpi_perf.6.%pnpinfo: 
dev.acpi_perf.6.%location: 
dev.acpi_perf.6.%driver: acpi_perf
dev.acpi_perf.6.%desc: 
dev.acpi_perf.5.%parent: cpu5
dev.acpi_perf.5.%pnpinfo: 
dev.acpi_perf.5.%location: 
dev.acpi_perf.5.%driver: acpi_perf
dev.acpi_perf.5.%desc: 
dev.acpi_perf.4.%parent: cpu4
dev.acpi_perf.4.%pnpinfo: 
dev.acpi_perf.4.%location: 
dev.acpi_perf.4.%driver: acpi_perf
dev.acpi_perf.4.%desc: 
dev.acpi_perf.3.%parent: cpu3
dev.acpi_perf.3.%pnpinfo: 
dev.acpi_perf.3.%location: 
dev.acpi_perf.3.%driver: acpi_perf
dev.acpi_perf.3.%desc: 
dev.acpi_perf.2.%parent: cpu2
dev.acpi_perf.2.%pnpinfo: 
dev.acpi_perf.2.%location: 
dev.acpi_perf.2.%driver: acpi_perf
dev.acpi_perf.2.%desc: 
dev.acpi_perf.1.%parent: cpu1
dev.acpi_perf.1.%pnpinfo: 
dev.acpi_perf.1.%location: 
dev.acpi_perf.1.%driver: acpi_perf
dev.acpi_perf.1.%desc: 
dev.acpi_perf.0.%parent: cpu0
dev.acpi_perf.0.%pnpinfo: 
dev.acpi_perf.0.%location: 
dev.acpi_perf.0.%driver: acpi_perf
dev.acpi_perf.0.%desc: 
dev.acpi_perf.%parent: 
dev.fpupnp.0.%parent: acpi0
dev.atdma.0.%parent: acpi0
dev.acpi_button.1.%parent: acpi0
dev.acpi_button.1.%pnpinfo: _HID=PNP0C0E _UID=0
dev.acpi_button.1.%location: handle=\_SB_.SLPB
dev.acpi_button.1.%driver: acpi_button
dev.acpi_button.1.%desc: Sleep Button
dev.acpi_button.0.%parent: acpi0
dev.acpi_button.0.%pnpinfo: _HID=PNP0C0C _UID=0
dev.acpi_button.0.%location: handle=\_SB_.PWRB
dev.acpi_button.0.%driver: acpi_button
dev.acpi_button.0.%desc: Power Button
dev.acpi_button.%parent: 
dev.acpi_lid.0.wake: 1
dev.acpi_lid.0.%parent: acpi0
dev.acpi_lid.0.%pnpinfo: _HID=PNP0C0D _UID=0
dev.acpi_lid.0.%location: handle=\_SB_.LID0
dev.acpi_lid.0.%driver: acpi_lid
dev.acpi_lid.0.%desc: Control Method Lid Switch
dev.acpi_lid.%parent: 
dev.acpi_acad.0.wake: 0
dev.acpi_acad.0.%parent: acpi0
dev.acpi_acad.0.%pnpinfo: _HID=ACPI0003 _UID=0
dev.acpi_acad.0.%location: handle=\_SB_.ADP1
dev.acpi_acad.0.%driver: acpi_acad
dev.acpi_acad.0.%desc: AC Adapter
dev.acpi_acad.%parent: 
dev.battery.0.%parent: acpi0
dev.pcib.0.%parent: acpi0
dev.pci_link.7.%parent: acpi0
dev.pci_link.6.%parent: acpi0
dev.pci_link.5.%parent: acpi0
dev.pci_link.4.%parent: acpi0
dev.pci_link.3.%parent: acpi0
dev.pci_link.2.%parent: acpi0
dev.pci_link.1.%parent: acpi0
dev.pci_link.0.%parent: acpi0
dev.acpi_timer.0.%parent: acpi0
dev.acpi_timer.0.%pnpinfo: unknown
dev.acpi_timer.0.%location: unknown
dev.acpi_timer.0.%driver: acpi_timer
dev.acpi_timer.0.%desc: 24-bit timer at 3.579545MHz
dev.acpi_timer.%parent: 
dev.attimer.0.%parent: acpi0
dev.atrtc.0.%parent: acpi0
dev.cpu.7.%parent: acpi0
dev.cpu.6.%parent: acpi0
dev.cpu.5.%parent: acpi0
dev.cpu.4.%parent: acpi0
dev.cpu.3.%parent: acpi0
dev.cpu.2.%parent: acpi0
dev.cpu.1.%parent: acpi0
dev.cpu.0.%parent: acpi0
dev.acpi_sysresource.2.%parent: acpi0
dev.acpi_sysresource.2.%pnpinfo: _HID=PNP0C01 _UID=2
dev.acpi_sysresource.2.%location: handle=\_SB_.MEM2
dev.acpi_sysresource.2.%driver: acpi_sysresource
dev.acpi_sysresource.2.%desc: System Resource
dev.acpi_sysresource.1.%parent: acpi0
dev.acpi_sysresource.1.%pnpinfo: _HID=PNP0C02 _UID=1
dev.acpi_sysresource.1.%location: handle=\_SB_.PCI0.PDRC
dev.acpi_sysresource.1.%driver: acpi_sysresource
dev.acpi_sysresource.1.%desc: System Resource
dev.acpi_sysresource.0.%parent: acpi0
dev.acpi_sysresource.0.%pnpinfo: _HID=PNP0C02 _UID=2
dev.acpi_sysresource.0.%location: handle=\_SB_.PCI0.LPCB.LDRC
dev.acpi_sysresource.0.%driver: acpi_sysresource
dev.acpi_sysresource.0.%desc: System Resource
dev.acpi_sysresource.%parent: 
dev.hpet.0.%parent: acpi0
dev.acpi_ec.0.wake: 0
dev.acpi_ec.0.%parent: acpi0
dev.acpi_ec.0.%pnpinfo: _HID=PNP0C09 _UID=0
dev.acpi_ec.0.%location: handle=\_SB_.PCI0.LPCB.EC__
dev.acpi_ec.0.%driver: acpi_ec
dev.acpi_ec.0.%desc: Embedded Controller: GPE 0x17, ECDT
dev.acpi_ec.%parent: 
dev.acpi.0.%parent: nexus0
dev.acpi.0.%pnpinfo: 
dev.acpi.0.%location: 
dev.acpi.0.%driver: acpi
dev.acpi.0.%desc: APPLE Apple00
dev.acpi.%parent:

我以前运行的是 Linux，通常会有一个视频或一些 ACPI 设置来控制屏幕的亮度，但在 FreeBSD 上，似乎没有这样的东西，所以我的显示器始终处于 100% 亮度。难道不应该有一些方法通过 acpi 接口来调暗亮度吗？

我可以获得一些支持来调暗屏幕亮度吗？

[编辑] 这是我的 xorg.conf 的输出

# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig:  version 367.35  Wed Sep  7 17:03:49 CST 2016

Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0"
    InputDevice    "Keyboard0" "CoreKeyboard"
    InputDevice    "Mouse0" "CorePointer"
EndSection

Section "Files"
EndSection

Section "InputDevice"
    # generated from default
    Identifier     "Mouse0"
    Driver         "mouse"
    Option         "Protocol" "auto"
    Option         "Device" "/dev/sysmouse"
    Option         "Emulate3Buttons" "no"
    Option         "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"
    # generated from default
    Identifier     "Keyboard0"
    Driver         "keyboard"
EndSection

Section "Monitor"
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "Unknown"
    HorizSync       28.0 - 33.0
    VertRefresh     43.0 - 72.0
    Option         "DPMS"
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

Answer 1

我在使用 Nvidia GT550M 的 Dell L702X 上遇到了亮度问题。你可以看到我在其中找到的内容这个线程（链接）。也许其中一些对你有用。

我无法使用xbacklight(1)（或激活亮度控制键），但我找到了其他几种更改亮度的方法：

• xrandr(1)

谢谢这篇文章（链接）我能够使用更改外部显示器的亮度xrandr。该命令如下所示：

    xrandr --output HDMI-0 --brightness 0.9

默认值似乎是1。

• redshift(1)

  Redshift 是一款允许您更改屏幕温度的软件。它有-b、-t和-g选项，这些选项可能会派上用场（请参阅 参考资料man redshift获取更多详细信息）。