xfce4 桌面环境在使用过程中随机变黑。
安装 xf86-video-ffbdev。
将在此处发布更新，并在我找到解决方案后立即发布。
$ uname -v
DragonFly v4.2.4-RELEASE #6: Sun Aug 9 13:25:14 EDT 2015 root@www.shiningsilence.com:/usr/obj/home/justin/release/4_2/sys/X86_64_GENERIC
n00b207：您不需要 xf86-video-fbdev（该警告是因为 Xorg 如何探测可用设备）
$ pciconf -lv
hostb0@pci0:0:0:0: class=0x060000 card=0x50001458 chip=0x0c008086 rev=0x06 hdr=0x00
vendor = 'Intel Corporation'
device = '4th Gen Core Processor DRAM Controller'
class = bridge
subclass = HOST-PCI
vgapci0@pci0:0:2:0: class=0x030000 card=0xd0001458 chip=0x041e8086 rev=0x06 hdr=0x00
vendor = 'Intel Corporation'
device = '4th Generation Core Processor Family Integrated Graphics Controller'
class = display
subclass = VGA
$ xset q
Keyboard Control:
auto repeat: on key click percent: 0 LED mask: 00000000
XKB indicators:
00: Caps Lock: off 01: Num Lock: off 02: Scroll Lock: off
03: Shift Lock: off 04: Group 2: off 05: Mouse Keys: off
auto repeat delay: 500 repeat rate: 20
auto repeating keys: 00feffffdffffbbf
fedfffffffdfe5ef
ffffffffffffffff
ffffffffffffffff
bell percent: 0 bell pitch: 400 bell duration: 100
Pointer Control:
acceleration: 2/1 threshold: 4
Screen Saver:
prefer blanking: yes allow exposures: yes
timeout: 600 cycle: 600
Colors:
default colormap: 0x22 BlackPixel: 0x0 WhitePixel: 0xffffff
Font Path:
/usr/local/share/fonts/misc/,/usr/local/share/fonts/TTF/,/usr/local/share/fonts/OTF/,/usr/local/share/fonts/Type1/,/usr/local/share/fonts/100dpi/,/usr/local/share/fonts/75dpi/,built-ins
DPMS (Energy Star):
Standby: 600 Suspend: 600 Off: 600
DPMS is Enabled
Monitor is On
Font cache:
Server does not have the FontCache Extension
n00b207：您能否尝试“xset dpms force off”来检查它是否冻结（可能需要重复几次才能完全进入关闭屏幕模式）
dmesg 输出： http: //pastebin.com/9tk5JCBf
n00b207：看起来你点击了 xfce+Xorg 组合，尝试“xset -dpms && xset s noblank && xset s off”看看它是否再次重复