我的虚拟机在 debian 操作系统上运行，一直运行良好，直到突然窗口不断闪烁。我把它关掉了，然后当我回来重新登录时，图形界面就消失了。现在登录显示如下：
信息：
debian : debian-10.7.0-amd64-xfce-CD-1.iso for Debian ISO image
host : Win 10
virtualbox : VirtualBox 6.1.16
知道发生了什么以及如何解决这个问题吗？
PS：似乎这种情况发生在进入空闲模式时：我第一次安装系统并登录，一切正常。然后当我有一段时间没有碰它时，它进入空闲模式并崩溃了
PS2：如果我在no-GUI模式下登录，并使用命令startx，我会进入图形界面，但没有任何反应，除了鼠标可以移动。
PS3：我还注意到在启动时，似乎有一些sensor not found error
PS3：从 dmesg 中，我发现重新安装错误，不确定是否相关：
[ 1.844082] systemd-udevd[456]: link_config: autonegotiation is unset or enabled, the speed and duplex are not writable.
[ 1.900356] hidraw: raw HID events driver (C) Jiri Kosina
[ 1.928662] usbcore: registered new interface driver usbhid
[ 1.928663] usbhid: USB HID core driver
[ 1.940952] input: VirtualBox USB Tablet as /devices/pci0000:00/0000:00:06.0/usb1/1-1/1-1:1.0/0003:80EE:0021.0001/input/input8
[ 1.941111] hid-generic 0003:80EE:0021.0001: input,hidraw0: USB HID v1.10 Mouse [VirtualBox USB Tablet] on usb-0000:00:06.0-1/input0
[ 2.997742] snd_intel8x0 0000:00:05.0: white list rate for 1028:0177 is 48000
[ 3.257158] Adding 998396k swap on /dev/sda5. Priority:-2 extents:1 across:998396k FS
[ 3.283602] EXT4-fs (sda1): re-mounted. Opts: errors=remount-ro
PS4：记录来自/var/log/Xorg.0.log
[ 7.389]
X.Org X Server 1.20.4
X Protocol Version 11, Revision 0
[ 7.389] Build Operating System: Linux 4.19.0-12-amd64 x86_64 Debian
[ 7.389] Current Operating System: Linux vandys 4.19.0-13-amd64 #1 SMP Debian 4.19.160-2 (2020-11-28) x86_64
[ 7.389] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.19.0-13-amd64 root=UUID=211eb506-9c5c-4d3b-9d63-2641d5b6e796 ro quiet
[ 7.389] Build Date: 01 December 2020 05:59:57PM
[ 7.389] xorg-server 2:1.20.4-1+deb10u2 (https://www.debian.org/support)
[ 7.389] Current version of pixman: 0.36.0
[ 7.389] Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version.
[ 7.389] Markers: (--) probed, (**) from config file, (==) default setting,
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[ 7.389] (==) Log file: "/var/log/Xorg.0.log", Time: Sun Dec 27 18:29:56 2020
[ 7.393] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
[ 7.395] (==) No Layout section. Using the first Screen section.
[ 7.395] (==) No screen section available. Using defaults.
[ 7.395] (**) |-->Screen "Default Screen Section" (0)
[ 7.395] (**) | |-->Monitor "<default monitor>"
[ 7.396] (==) No monitor specified for screen "Default Screen Section".
Using a default monitor configuration.
[ 7.396] (==) Automatically adding devices
[ 7.396] (==) Automatically enabling devices
[ 7.396] (==) Automatically adding GPU devices
[ 7.396] (==) Max clients allowed: 256, resource mask: 0x1fffff
[ 7.399] (WW) The directory "/usr/share/fonts/X11/cyrillic" does not exist.
[ 7.399] Entry deleted from font path.
[ 7.403] (==) FontPath set to:
/usr/share/fonts/X11/misc,
/usr/share/fonts/X11/100dpi/:unscaled,
/usr/share/fonts/X11/75dpi/:unscaled,
/usr/share/fonts/X11/Type1,
/usr/share/fonts/X11/100dpi,
/usr/share/fonts/X11/75dpi,
built-ins
[ 7.403] (==) ModulePath set to "/usr/lib/xorg/modules"
[ 7.403] (II) The server relies on udev to provide the list of input devices.
If no devices become available, reconfigure udev or disable AutoAddDevices.
[ 7.403] (II) Loader magic: 0x55be10576e20
[ 7.403] (II) Module ABI versions:
[ 7.403] X.Org ANSI C Emulation: 0.4
[ 7.403] X.Org Video Driver: 24.0
[ 7.403] X.Org XInput driver : 24.1
[ 7.403] X.Org Server Extension : 10.0
[ 7.404] (++) using VT number 7
[ 7.404] (II) systemd-logind: logind integration requires -keeptty and -keeptty was not provided, disabling logind integration
[ 7.404] (II) xfree86: Adding drm device (/dev/dri/card0)
[ 7.407] (--) PCI:*(0@0:2:0) 15ad:0405:15ad:0405 rev 0, Mem @ 0xe0000000/16777216, 0xf0000000/2097152, I/O @ 0x0000d010/16, BIOS @ 0x????????/131072
[ 7.407] (II) LoadModule: "glx"
[ 7.407] (II) Loading /usr/lib/xorg/modules/extensions/libglx.so
[ 7.415] (II) Module glx: vendor="X.Org Foundation"
[ 7.415] compiled for 1.20.4, module version = 1.0.0
[ 7.415] ABI class: X.Org Server Extension, version 10.0
[ 7.415] (==) Matched vmware as autoconfigured driver 0
[ 7.415] (==) Matched modesetting as autoconfigured driver 1
[ 7.415] (==) Matched fbdev as autoconfigured driver 2
[ 7.415] (==) Matched vesa as autoconfigured driver 3
[ 7.415] (==) Assigned the driver to the xf86ConfigLayout
[ 7.415] (II) LoadModule: "vmware"
[ 7.415] (II) Loading /usr/lib/xorg/modules/drivers/vmware_drv.so
[ 7.495] (II) Module vmware: vendor="X.Org Foundation"
[ 7.495] compiled for 1.20.0, module version = 13.3.0
[ 7.495] Module class: X.Org Video Driver
[ 7.495] ABI class: X.Org Video Driver, version 24.0
[ 7.495] (II) LoadModule: "modesetting"
[ 7.495] (II) Loading /usr/lib/xorg/modules/drivers/modesetting_drv.so
[ 7.496] (II) Module modesetting: vendor="X.Org Foundation"
[ 7.496] compiled for 1.20.4, module version = 1.20.4
[ 7.496] Module class: X.Org Video Driver
[ 7.496] ABI class: X.Org Video Driver, version 24.0
[ 7.496] (II) LoadModule: "fbdev"
[ 7.496] (II) Loading /usr/lib/xorg/modules/drivers/fbdev_drv.so
[ 7.496] (II) Module fbdev: vendor="X.Org Foundation"
[ 7.496] compiled for 1.20.0, module version = 0.5.0
[ 7.496] Module class: X.Org Video Driver
[ 7.496] ABI class: X.Org Video Driver, version 24.0
[ 7.496] (II) LoadModule: "vesa"
[ 7.496] (II) Loading /usr/lib/xorg/modules/drivers/vesa_drv.so
[ 7.497] (II) Module vesa: vendor="X.Org Foundation"
[ 7.497] compiled for 1.20.1, module version = 2.4.0
[ 7.497] Module class: X.Org Video Driver
[ 7.497] ABI class: X.Org Video Driver, version 24.0
[ 7.497] (II) vmware: driver for VMware SVGA: vmware0405, vmware0710
[ 7.497] (II) modesetting: Driver for Modesetting Kernel Drivers: kms
[ 7.497] (II) FBDEV: driver for framebuffer: fbdev
[ 7.497] (II) VESA: driver for VESA chipsets: vesa
[ 7.500] (WW) Falling back to old probe method for modesetting
[ 7.500] (WW) Falling back to old probe method for fbdev
[ 7.500] (II) Loading sub module "fbdevhw"
[ 7.500] (II) LoadModule: "fbdevhw"
[ 7.500] (II) Loading /usr/lib/xorg/modules/libfbdevhw.so
[ 7.501] (II) Module fbdevhw: vendor="X.Org Foundation"
[ 7.501] compiled for 1.20.4, module version = 0.0.2
[ 7.501] ABI class: X.Org Video Driver, version 24.0
[ 7.501] (II) vmware(0): Creating default Display subsection in Screen section
"Default Screen Section" for depth/fbbpp 24/32
[ 7.501] (--) vmware(0): DRM driver version is 2.15.0
[ 7.501] (==) vmware(0): Depth 24, (--) framebuffer bpp 32
[ 7.501] (==) vmware(0): RGB weight 888
[ 7.501] (==) vmware(0): Default visual is TrueColor
[ 7.501] (--) vmware(0): Min width 1, Max Width 8192.
[ 7.501] (--) vmware(0): Min height 1, Max Height 8192.
[ 7.501] (II) vmware(0): Output Virtual1 has no monitor section
[ 7.501] (II) vmware(0): Output Virtual2 has no monitor section
[ 7.501] (II) vmware(0): Output Virtual3 has no monitor section
[ 7.501] (II) vmware(0): Output Virtual4 has no monitor section
[ 7.501] (II) vmware(0): Output Virtual5 has no monitor section
[ 7.501] (II) vmware(0): Output Virtual6 has no monitor section
[ 7.501] (II) vmware(0): Output Virtual7 has no monitor section
[ 7.501] (II) vmware(0): Output Virtual8 has no monitor section
[ 7.501] (II) vmware(0): Printing probed modes for output Virtual1
[ 7.501] (II) vmware(0): Modeline "800x600"x60.0 42.75 800 850 900 950 600 650 700 750 -hsync +vsync (45.0 kHz eP)
[ 7.501] (II) vmware(0): Modeline "2560x1600"x60.0 348.50 2560 2752 3032 3504 1600 1603 1609 1658 -hsync +vsync (99.5 kHz e)
[ 7.501] (II) vmware(0): Modeline "1920x1440"x60.0 234.00 1920 2048 2256 2600 1440 1441 1444 1500 -hsync +vsync (90.0 kHz e)
[ 7.501] (II) vmware(0): Modeline "1856x1392"x60.0 218.25 1856 1952 2176 2528 1392 1393 1396 1439 -hsync +vsync (86.3 kHz e)
[ 7.501] (II) vmware(0): Modeline "1792x1344"x60.0 204.75 1792 1920 2120 2448 1344 1345 1348 1394 -hsync +vsync (83.6 kHz e)
[ 7.501] (II) vmware(0): Modeline "1920x1200"x59.9 193.25 1920 2056 2256 2592 1200 1203 1209 1245 -hsync +vsync (74.6 kHz e)
[ 7.501] (II) vmware(0): Modeline "1600x1200"x60.0 162.00 1600 1664 1856 2160 1200 1201 1204 1250 +hsync +vsync (75.0 kHz e)
[ 7.501] (II) vmware(0): Modeline "1680x1050"x60.0 146.25 1680 1784 1960 2240 1050 1053 1059 1089 -hsync +vsync (65.3 kHz e)
[ 7.501] (II) vmware(0): Modeline "1400x1050"x60.0 121.75 1400 1488 1632 1864 1050 1053 1057 1089 -hsync +vsync (65.3 kHz e)
[ 7.501] (II) vmware(0): Modeline "1280x1024"x60.0 108.00 1280 1328 1440 1688 1024 1025 1028 1066 +hsync +vsync (64.0 kHz e)
[ 7.501] (II) vmware(0): Modeline "1440x900"x59.9 106.50 1440 1520 1672 1904 900 903 909 934 -hsync +vsync (55.9 kHz e)
[ 7.501] (II) vmware(0): Modeline "1280x960"x60.0 108.00 1280 1376 1488 1800 960 961 964 1000 +hsync +vsync (60.0 kHz e)
[ 7.501] (II) vmware(0): Modeline "1360x768"x60.0 85.50 1360 1424 1536 1792 768 771 777 795 +hsync +vsync (47.7 kHz e)
[ 7.501] (II) vmware(0): Modeline "1280x800"x59.8 83.50 1280 1352 1480 1680 800 803 809 831 +hsync -vsync (49.7 kHz e)
[ 7.501] (II) vmware(0): Modeline "1152x864"x75.0 108.00 1152 1216 1344 1600 864 865 868 900 +hsync +vsync (67.5 kHz e)
[ 7.501] (II) vmware(0): Modeline "1280x768"x59.9 79.50 1280 1344 1472 1664 768 771 778 798 -hsync +vsync (47.8 kHz e)
[ 7.501] (II) vmware(0): Modeline "1024x768"x60.0 65.00 1024 1048 1184 1344 768 771 777 806 -hsync -vsync (48.4 kHz e)
[ 7.501] (II) vmware(0): Modeline "800x600"x60.3 40.00 800 840 968 1056 600 601 605 628 +hsync +vsync (37.9 kHz e)
[ 7.501] (II) vmware(0): Modeline "640x480"x59.9 25.18 640 656 752 800 480 489 492 525 -hsync -vsync (31.5 kHz e)
[ 7.501] (II) vmware(0): EDID for output Virtual2
[ 7.501] (II) vmware(0): EDID for output Virtual3
[ 7.501] (II) vmware(0): EDID for output Virtual4
[ 7.502] (II) vmware(0): EDID for output Virtual5
[ 7.502] (II) vmware(0): EDID for output Virtual6
[ 7.502] (II) vmware(0): EDID for output Virtual7
[ 7.502] (II) vmware(0): EDID for output Virtual8
[ 7.502] (II) vmware(0): Output Virtual1 connected
[ 7.502] (II) vmware(0): Output Virtual2 disconnected
[ 7.502] (II) vmware(0): Output Virtual3 disconnected
[ 7.502] (II) vmware(0): Output Virtual4 disconnected
[ 7.502] (II) vmware(0): Output Virtual5 disconnected
[ 7.502] (II) vmware(0): Output Virtual6 disconnected
[ 7.502] (II) vmware(0): Output Virtual7 disconnected
[ 7.502] (II) vmware(0): Output Virtual8 disconnected
[ 7.502] (II) vmware(0): Using exact sizes for initial modes
[ 7.502] (II) vmware(0): Output Virtual1 using initial mode 800x600 +0+0
[ 7.502] (==) vmware(0): DPI set to (96, 96)
[ 7.502] (==) vmware(0): Using gamma correction (1.0, 1.0, 1.0)
[ 7.502] (II) Loading sub module "fb"
[ 7.502] (II) LoadModule: "fb"
[ 7.502] (II) Loading /usr/lib/xorg/modules/libfb.so
[ 7.505] (II) Module fb: vendor="X.Org Foundation"
[ 7.505] compiled for 1.20.4, module version = 1.0.0
[ 7.505] ABI class: X.Org ANSI C Emulation, version 0.4
[ 7.505] (II) Loading sub module "dri2"
[ 7.505] (II) LoadModule: "dri2"
[ 7.505] (II) Module "dri2" already built-in
[ 7.505] (II) Loading sub module "dri3"
[ 7.505] (II) LoadModule: "dri3"
[ 7.505] (II) Module "dri3" already built-in
[ 7.505] (II) UnloadModule: "modesetting"
[ 7.505] (II) Unloading modesetting
[ 7.505] (II) UnloadModule: "fbdev"
[ 7.505] (II) Unloading fbdev
[ 7.505] (II) UnloadSubModule: "fbdevhw"
[ 7.505] (II) Unloading fbdevhw
[ 7.505] (II) UnloadModule: "vesa"
[ 7.505] (II) Unloading vesa
[ 7.510] (II) vmware(0): Initialized VMWARE_CTRL extension version 0.2
[ 7.514] (WW) vmware(0): Failed to initialize Gallium3D Xa. No render acceleration available.
[ 7.514] (WW) vmware(0): Skipped initialization of direct rendering due to lack of render acceleration.
[ 7.514] (--) vmware(0): Render acceleration is disabled.
[ 7.514] (==) vmware(0): Rendercheck mode is disabled.
[ 7.514] (--) vmware(0): Direct rendering (DRI2 3D) is disabled.
[ 7.514] (--) vmware(0): Direct rendering (DRI3 3D) is disabled.
[ 7.514] (==) vmware(0): Backing store enabled
[ 7.514] (==) vmware(0): Silken mouse enabled
[ 7.515] (==) vmware(0): DPMS enabled
[ 7.515] (II) vmware(0): No 3D acceleration. Not setting up textured video.
[ 7.515] (WW) vmware(0): Disabling Xv because no adaptors could be initialized.
[ 7.515] (II) Initializing extension Generic Event Extension
[ 7.516] (II) Initializing extension SHAPE
[ 7.516] (II) Initializing extension MIT-SHM
[ 7.516] (II) Initializing extension XInputExtension
[ 7.516] (II) Initializing extension XTEST
[ 7.516] (II) Initializing extension BIG-REQUESTS
[ 7.516] (II) Initializing extension SYNC
[ 7.516] (II) Initializing extension XKEYBOARD
[ 7.516] (II) Initializing extension XC-MISC
[ 7.517] (II) Initializing extension SECURITY
[ 7.517] (II) Initializing extension XFIXES
[ 7.517] (II) Initializing extension RENDER
[ 7.517] (II) Initializing extension RANDR
[ 7.517] (II) Initializing extension COMPOSITE
[ 7.517] (II) Initializing extension DAMAGE
[ 7.517] (II) Initializing extension MIT-SCREEN-SAVER
[ 7.517] (II) Initializing extension DOUBLE-BUFFER
[ 7.517] (II) Initializing extension RECORD
[ 7.517] (II) Initializing extension DPMS
[ 7.517] (II) Initializing extension Present
[ 7.517] (II) Initializing extension DRI3
[ 7.517] (II) Initializing extension X-Resource
[ 7.518] (II) Initializing extension XVideo
[ 7.518] (II) Initializing extension XVideo-MotionCompensation
[ 7.518] (II) Initializing extension SELinux
[ 7.518] (II) SELinux: Disabled on system
[ 7.518] (II) Initializing extension GLX
[ 7.518] (II) AIGLX: Screen 0 is not DRI2 capable
[ 7.545] (II) IGLX: Loaded and initialized swrast
[ 7.545] (II) GLX: Initialized DRISWRAST GL provider for screen 0
[ 7.545] (II) Initializing extension XFree86-VidModeExtension
[ 7.545] (II) Initializing extension XFree86-DGA
[ 7.545] (II) Initializing extension XFree86-DRI
[ 7.545] (II) Initializing extension DRI2
[ 7.548] (II) vmware(0): Setting screen physical size to 211 x 158
[ 7.594] (II) config/udev: Adding input device Power Button (/dev/input/event1)
[ 7.594] (**) Power Button: Applying InputClass "libinput keyboard catchall"
[ 7.594] (II) LoadModule: "libinput"
[ 7.594] (II) Loading /usr/lib/xorg/modules/input/libinput_drv.so
[ 7.599] (II) Module libinput: vendor="X.Org Foundation"
[ 7.599] compiled for 1.20.4, module version = 0.28.2
[ 7.599] Module class: X.Org XInput Driver
[ 7.599] ABI class: X.Org XInput driver, version 24.1
[ 7.599] (II) Using input driver 'libinput' for 'Power Button'
[ 7.599] (**) Power Button: always reports core events
[ 7.599] (**) Option "Device" "/dev/input/event1"
[ 7.600] (**) Option "_source" "server/udev"
[ 7.606] (II) event1 - Power Button: is tagged by udev as: Keyboard
[ 7.606] (II) event1 - Power Button: device is a keyboard
[ 7.606] (II) event1 - Power Button: device removed
[ 7.606] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/LNXPWRBN:00/input/input2/event1"
[ 7.606] (II) XINPUT: Adding extended input device "Power Button" (type: KEYBOARD, id 6)
[ 7.606] (**) Option "xkb_model" "pc105"
[ 7.606] (**) Option "xkb_layout" "us"
[ 7.607] (II) event1 - Power Button: is tagged by udev as: Keyboard
[ 7.607] (II) event1 - Power Button: device is a keyboard
[ 7.607] (II) config/udev: Adding input device Sleep Button (/dev/input/event2)
[ 7.607] (**) Sleep Button: Applying InputClass "libinput keyboard catchall"
[ 7.607] (II) Using input driver 'libinput' for 'Sleep Button'
[ 7.607] (**) Sleep Button: always reports core events
[ 7.607] (**) Option "Device" "/dev/input/event2"
[ 7.607] (**) Option "_source" "server/udev"
[ 7.612] (II) event2 - Sleep Button: is tagged by udev as: Keyboard
[ 7.612] (II) event2 - Sleep Button: device is a keyboard
[ 7.612] (II) event2 - Sleep Button: device removed
[ 7.612] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/LNXSLPBN:00/input/input3/event2"
[ 7.612] (II) XINPUT: Adding extended input device "Sleep Button" (type: KEYBOARD, id 7)
[ 7.612] (**) Option "xkb_model" "pc105"
[ 7.612] (**) Option "xkb_layout" "us"
[ 7.613] (II) event2 - Sleep Button: is tagged by udev as: Keyboard
[ 7.613] (II) event2 - Sleep Button: device is a keyboard
[ 7.613] (II) config/udev: Adding input device Video Bus (/dev/input/event3)
[ 7.613] (**) Video Bus: Applying InputClass "libinput keyboard catchall"
[ 7.613] (II) Using input driver 'libinput' for 'Video Bus'
[ 7.613] (**) Video Bus: always reports core events
[ 7.613] (**) Option "Device" "/dev/input/event3"
[ 7.613] (**) Option "_source" "server/udev"
[ 7.613] (II) event3 - Video Bus: is tagged by udev as: Keyboard
[ 7.613] (II) event3 - Video Bus: device is a keyboard
[ 7.613] (II) event3 - Video Bus: device removed
[ 7.614] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/LNXVIDEO:00/input/input4/event3"
[ 7.614] (II) XINPUT: Adding extended input device "Video Bus" (type: KEYBOARD, id 8)
[ 7.614] (**) Option "xkb_model" "pc105"
[ 7.614] (**) Option "xkb_layout" "us"
[ 7.614] (II) event3 - Video Bus: is tagged by udev as: Keyboard
[ 7.614] (II) event3 - Video Bus: device is a keyboard
[ 7.615] (II) config/udev: Adding input device VirtualBox mouse integration (/dev/input/event6)
[ 7.615] (**) VirtualBox mouse integration: Applying InputClass "libinput pointer catchall"
[ 7.615] (II) Using input driver 'libinput' for 'VirtualBox mouse integration'
[ 7.615] (**) VirtualBox mouse integration: always reports core events
[ 7.615] (**) Option "Device" "/dev/input/event6"
[ 7.615] (**) Option "_source" "server/udev"
[ 7.615] (II) event6 - VirtualBox mouse integration: is tagged by udev as: Mouse
[ 7.615] (II) event6 - VirtualBox mouse integration: device is a pointer
[ 7.615] (II) event6 - VirtualBox mouse integration: device removed
[ 7.615] (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:04.0/input/input7/event6"
[ 7.615] (II) XINPUT: Adding extended input device "VirtualBox mouse integration" (type: MOUSE, id 9)
[ 7.615] (**) Option "AccelerationScheme" "none"
[ 7.615] (**) VirtualBox mouse integration: (accel) selected scheme none/0
[ 7.615] (**) VirtualBox mouse integration: (accel) acceleration factor: 2.000
[ 7.615] (**) VirtualBox mouse integration: (accel) acceleration threshold: 4
[ 7.616] (II) event6 - VirtualBox mouse integration: is tagged by udev as: Mouse
[ 7.616] (II) event6 - VirtualBox mouse integration: device is a pointer
[ 7.616] (II) config/udev: Adding input device VirtualBox mouse integration (/dev/input/js0)
[ 7.616] (II) No input driver specified, ignoring this device.
[ 7.616] (II) This device may have been added with another device file.
[ 7.617] (II) config/udev: Adding input device VirtualBox USB Tablet (/dev/input/event7)
[ 7.617] (**) VirtualBox USB Tablet: Applying InputClass "libinput pointer catchall"
[ 7.617] (II) Using input driver 'libinput' for 'VirtualBox USB Tablet'
[ 7.617] (**) VirtualBox USB Tablet: always reports core events
[ 7.617] (**) Option "Device" "/dev/input/event7"
[ 7.617] (**) Option "_source" "server/udev"
[ 7.678] (II) event7 - VirtualBox USB Tablet: is tagged by udev as: Mouse
[ 7.678] (II) event7 - VirtualBox USB Tablet: device is a pointer
[ 7.678] (II) event7 - VirtualBox USB Tablet: device removed
[ 7.684] (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:06.0/usb1/1-1/1-1:1.0/0003:80EE:0021.0001/input/input8/event7"
[ 7.684] (II) XINPUT: Adding extended input device "VirtualBox USB Tablet" (type: MOUSE, id 10)
[ 7.684] (**) Option "AccelerationScheme" "none"
[ 7.684] (**) VirtualBox USB Tablet: (accel) selected scheme none/0
[ 7.684] (**) VirtualBox USB Tablet: (accel) acceleration factor: 2.000
[ 7.684] (**) VirtualBox USB Tablet: (accel) acceleration threshold: 4
[ 7.746] (II) event7 - VirtualBox USB Tablet: is tagged by udev as: Mouse
[ 7.746] (II) event7 - VirtualBox USB Tablet: device is a pointer
[ 7.747] (II) config/udev: Adding input device VirtualBox USB Tablet (/dev/input/js1)
[ 7.747] (II) No input driver specified, ignoring this device.
[ 7.747] (II) This device may have been added with another device file.
[ 7.747] (II) config/udev: Adding input device VirtualBox USB Tablet (/dev/input/mouse1)
[ 7.747] (II) No input driver specified, ignoring this device.
[ 7.747] (II) This device may have been added with another device file.
[ 7.748] (II) config/udev: Adding input device AT Translated Set 2 keyboard (/dev/input/event0)
[ 7.748] (**) AT Translated Set 2 keyboard: Applying InputClass "libinput keyboard catchall"
[ 7.748] (II) Using input driver 'libinput' for 'AT Translated Set 2 keyboard'
[ 7.748] (**) AT Translated Set 2 keyboard: always reports core events
[ 7.748] (**) Option "Device" "/dev/input/event0"
[ 7.748] (**) Option "_source" "server/udev"
[ 7.748] (II) event0 - AT Translated Set 2 keyboard: is tagged by udev as: Keyboard
[ 7.748] (II) event0 - AT Translated Set 2 keyboard: device is a keyboard
[ 7.748] (II) event0 - AT Translated Set 2 keyboard: device removed
[ 7.748] (**) Option "config_info" "udev:/sys/devices/platform/i8042/serio0/input/input0/event0"
[ 7.748] (II) XINPUT: Adding extended input device "AT Translated Set 2 keyboard" (type: KEYBOARD, id 11)
[ 7.748] (**) Option "xkb_model" "pc105"
[ 7.748] (**) Option "xkb_layout" "us"
[ 7.749] (II) event0 - AT Translated Set 2 keyboard: is tagged by udev as: Keyboard
[ 7.749] (II) event0 - AT Translated Set 2 keyboard: device is a keyboard
[ 7.750] (II) config/udev: Adding input device ImExPS/2 Generic Explorer Mouse (/dev/input/event4)
[ 7.750] (**) ImExPS/2 Generic Explorer Mouse: Applying InputClass "libinput pointer catchall"
[ 7.750] (II) Using input driver 'libinput' for 'ImExPS/2 Generic Explorer Mouse'
[ 7.750] (**) ImExPS/2 Generic Explorer Mouse: always reports core events
[ 7.750] (**) Option "Device" "/dev/input/event4"
[ 7.750] (**) Option "_source" "server/udev"
[ 7.750] (II) event4 - ImExPS/2 Generic Explorer Mouse: is tagged by udev as: Mouse
[ 7.750] (II) event4 - ImExPS/2 Generic Explorer Mouse: device is a pointer
[ 7.750] (II) event4 - ImExPS/2 Generic Explorer Mouse: device removed
[ 7.750] (**) Option "config_info" "udev:/sys/devices/platform/i8042/serio1/input/input5/event4"
[ 7.750] (II) XINPUT: Adding extended input device "ImExPS/2 Generic Explorer Mouse" (type: MOUSE, id 12)
[ 7.751] (**) Option "AccelerationScheme" "none"
[ 7.751] (**) ImExPS/2 Generic Explorer Mouse: (accel) selected scheme none/0
[ 7.751] (**) ImExPS/2 Generic Explorer Mouse: (accel) acceleration factor: 2.000
[ 7.751] (**) ImExPS/2 Generic Explorer Mouse: (accel) acceleration threshold: 4
[ 7.751] (II) event4 - ImExPS/2 Generic Explorer Mouse: is tagged by udev as: Mouse
[ 7.751] (II) event4 - ImExPS/2 Generic Explorer Mouse: device is a pointer
[ 7.751] (II) config/udev: Adding input device ImExPS/2 Generic Explorer Mouse (/dev/input/mouse0)
[ 7.751] (II) No input driver specified, ignoring this device.
[ 7.751] (II) This device may have been added with another device file.
[ 7.752] (II) config/udev: Adding input device PC Speaker (/dev/input/event5)
[ 7.752] (II) No input driver specified, ignoring this device.
[ 7.752] (II) This device may have been added with another device file.
[ 32.450] (EE) No surface to present from.
[ 675.003] (II) event1 - Power Button: device removed
[ 675.004] (II) event2 - Sleep Button: device removed
[ 675.005] (II) event3 - Video Bus: device removed
[ 675.005] (II) event6 - VirtualBox mouse integration: device removed
[ 675.006] (II) event7 - VirtualBox USB Tablet: device removed
[ 675.019] (II) event0 - AT Translated Set 2 keyboard: device removed
[ 675.020] (II) event4 - ImExPS/2 Generic Explorer Mouse: device removed
[ 707.817] (II) config/udev: removing device VirtualBox USB Tablet
[ 707.818] (II) UnloadModule: "libinput"
[ 708.840] (II) config/udev: Adding input device VirtualBox USB Tablet (/dev/input/js1)
[ 708.840] (II) No input driver specified, ignoring this device.
[ 708.840] (II) This device may have been added with another device file.
[ 708.851] (II) config/udev: Adding input device VirtualBox USB Tablet (/dev/input/mouse1)
[ 708.851] (II) No input driver specified, ignoring this device.
[ 708.851] (II) This device may have been added with another device file.
[ 708.986] (II) config/udev: Adding input device VirtualBox USB Tablet (/dev/input/event7)
[ 708.986] (**) VirtualBox USB Tablet: Applying InputClass "libinput pointer catchall"
[ 708.986] (II) Using input driver 'libinput' for 'VirtualBox USB Tablet'
[ 708.986] (**) VirtualBox USB Tablet: always reports core events
[ 708.986] (**) Option "Device" "/dev/input/event7"
[ 708.986] (**) Option "_source" "server/udev"
[ 709.046] (II) event7 - VirtualBox USB Tablet: is tagged by udev as: Mouse
[ 709.046] (II) event7 - VirtualBox USB Tablet: device is a pointer
[ 709.047] (II) event7 - VirtualBox USB Tablet: device removed
[ 709.050] (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:06.0/usb1/1-1/1-1:1.0/0003:80EE:0021.0002/input/input9/event7"
[ 709.050] (II) XINPUT: Adding extended input device "VirtualBox USB Tablet" (type: MOUSE, id 10)
[ 709.051] (**) Option "AccelerationScheme" "none"
[ 709.051] (**) VirtualBox USB Tablet: (accel) selected scheme none/0
[ 709.051] (**) VirtualBox USB Tablet: (accel) acceleration factor: 2.000
[ 709.051] (**) VirtualBox USB Tablet: (accel) acceleration threshold: 4
更新： 似乎有问题debian-10.7.0-amd64-xfce-CD-1，不确定这是否是 debian 社区的一些已知错误，但在我更改为 后debian-10.5.0-amd64-xfce-CD-1，到目前为止似乎运行良好。
答案1
您可能磁盘空间不足，请检查一下，也许该/var/log文件夹已填满您的驱动器。您还可以使用 liveCD 测试磁盘以确保文件系统没有损坏fsck.ext4。
答案2
发生这种情况的原因有多种，不正确地更新系统就是其中之一。上次我遇到这个问题时，我手动卸载并安装了 python，它对我有用。你可以尝试以下方法吗：
sudo apt remove python
sudo apt install python
如果你安装了多个版本的Python，那么你可能需要在上面的命令中使用python2或 ，python2.7这样终端就不会与版本相矛盾。
执行上述步骤后，请确保正确重新启动系统。