昨天，我添加了 Sane PPA（扫描仪驱动程序）、aptitude update+upgrade，然后按照提示重新启动。重新启动没有完成（它只是在屏幕上停留了 15 分钟，显示“Ubuntu”和红/白点），所以我关闭了机器的电源。
现在我看到了看起来像未初始化的视频内存，窗口阴影和角落按钮应该位于此处：
我在使用配备 NVidia 960M 的 Dell XPS 15" 电脑，运行显卡驱动程序 PPA (nvidia-375 375.39-0ubuntu0~gpu16.04.2)，其余软件包方面相当原始的 16.04。
如果相关的话，我可以找出昨天的 aptitude 升级具体更新了哪些软件包的日志。
我的问题：
- 这是一个已知的问题？
- 有解决方法或修复方法吗？
- 如果没有，那么报告该错误的最佳地点是哪里？
编辑以添加所需信息：
$ lspci -nnk | grep -A2 VGA
00:02.0 VGA compatible controller [0300]: Intel Corporation Skylake Integrated Graphics [8086:191b] (rev 06)
DeviceName: Onboard IGD
Subsystem: Dell Skylake Integrated Graphics [1028:06e4]
但仅供参考，还有：
01:00.0 3D controller [0302]: NVIDIA Corporation GM107M [GeForce GTX 960M] [10de:139b] (rev a2)
Subsystem: Dell GM107M [GeForce GTX 960M] [1028:06e4]
Kernel driver in use: nvidia
Kernel modules: nvidiafb, nouveau, nvidia_375_drm, nvidia_375
Xorg.0.日志：
[ 5.139]
X.Org X Server 1.18.4
Release Date: 2016-07-19
[ 5.139] X Protocol Version 11, Revision 0
[ 5.139] Build Operating System: Linux 4.4.0-45-generic x86_64 Ubuntu
[ 5.139] Current Operating System: Linux xps 4.4.0-66-generic #87-Ubuntu SMP Fri Mar 3 15:29:05 UTC 2017 x86_64
[ 5.139] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.4.0-66-generic.efi.signed root=UUID=79df2908-59b6-47bf-9138-c9f552866024 ro RESUME=UUID=/dev/nvme0n1p3 quiet splash vt.handoff=7
[ 5.139] Build Date: 02 November 2016 10:06:10PM
[ 5.139] xorg-server 2:1.18.4-0ubuntu0.2 (For technical support please see http://www.ubuntu.com/support)
[ 5.139] Current version of pixman: 0.33.6
[ 5.139] Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version.
[ 5.139] Markers: (--) probed, (**) from config file, (==) default setting,
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[ 5.139] (==) Log file: "/var/log/Xorg.0.log", Time: Wed Mar 8 09:34:26 2017
[ 5.139] (==) Using config file: "/etc/X11/xorg.conf"
[ 5.139] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
[ 5.140] (==) ServerLayout "layout"
[ 5.140] (**) |-->Screen "nvidia" (0)
[ 5.140] (**) | |-->Monitor "<default monitor>"
[ 5.141] (**) | |-->Device "nvidia"
[ 5.141] (**) | |-->GPUDevice "nvidia"
[ 5.141] (==) No monitor specified for screen "nvidia".
Using a default monitor configuration.
[ 5.141] (**) |-->Inactive Device "intel"
[ 5.141] (==) Automatically adding devices
[ 5.141] (==) Automatically enabling devices
[ 5.141] (==) Automatically adding GPU devices
[ 5.141] (==) Max clients allowed: 256, resource mask: 0x1fffff
[ 5.141] (WW) The directory "/usr/share/fonts/X11/cyrillic" does not exist.
[ 5.141] Entry deleted from font path.
[ 5.141] (WW) The directory "/usr/share/fonts/X11/100dpi/" does not exist.
[ 5.141] Entry deleted from font path.
[ 5.141] (WW) The directory "/usr/share/fonts/X11/75dpi/" does not exist.
[ 5.141] Entry deleted from font path.
[ 5.141] (WW) The directory "/usr/share/fonts/X11/100dpi" does not exist.
[ 5.141] Entry deleted from font path.
[ 5.141] (WW) The directory "/usr/share/fonts/X11/75dpi" does not exist.
[ 5.141] Entry deleted from font path.
[ 5.141] (==) FontPath set to:
/usr/share/fonts/X11/misc,
/usr/share/fonts/X11/Type1,
built-ins
[ 5.141] (==) ModulePath set to "/usr/lib/x86_64-linux-gnu/xorg/extra-modules,/usr/lib/xorg/extra-modules,/usr/lib/xorg/modules"
[ 5.141] (II) The server relies on udev to provide the list of input devices.
If no devices become available, reconfigure udev or disable AutoAddDevices.
[ 5.141] (II) Loader magic: 0x56154a22ddc0
[ 5.141] (II) Module ABI versions:
[ 5.141] X.Org ANSI C Emulation: 0.4
[ 5.141] X.Org Video Driver: 20.0
[ 5.141] X.Org XInput driver : 22.1
[ 5.141] X.Org Server Extension : 9.0
[ 5.141] (++) using VT number 7
[ 5.141] (II) systemd-logind: logind integration requires -keeptty and -keeptty was not provided, disabling logind integration
[ 5.142] (II) xfree86: Adding drm device (/dev/dri/card0)
[ 5.142] (II) xfree86: Adding drm device (/dev/dri/card1)
[ 5.245] (--) PCI:*(0:0:2:0) 8086:191b:1028:06e4 rev 6, Mem @ 0xdb000000/16777216, 0x70000000/268435456, I/O @ 0x0000f000/64
[ 5.245] (--) PCI: (0:1:0:0) 10de:139b:1028:06e4 rev 162, Mem @ 0xdc000000/16777216, 0xb0000000/268435456, 0xc0000000/33554432, I/O @ 0x0000e000/128, BIOS @ 0x????????/524288
[ 5.245] (WW) "glamoregl" will not be loaded unless you've specified it to be loaded elsewhere.
[ 5.245] (II) "glx" will be loaded by default.
[ 5.245] (II) LoadModule: "glx"
[ 5.246] (II) Loading /usr/lib/x86_64-linux-gnu/xorg/extra-modules/libglx.so
[ 5.255] (II) Module glx: vendor="NVIDIA Corporation"
[ 5.255] compiled for 4.0.2, module version = 1.0.0
[ 5.255] Module class: X.Org Server Extension
[ 5.256] (II) NVIDIA GLX Module 375.39 Tue Jan 31 19:37:12 PST 2017
[ 5.256] (II) LoadModule: "nvidia"
[ 5.256] (II) Loading /usr/lib/x86_64-linux-gnu/xorg/extra-modules/nvidia_drv.so
[ 5.257] (II) Module nvidia: vendor="NVIDIA Corporation"
[ 5.257] compiled for 4.0.2, module version = 1.0.0
[ 5.257] Module class: X.Org Video Driver
[ 5.258] (II) LoadModule: "modesetting"
[ 5.258] (II) Loading /usr/lib/xorg/modules/drivers/modesetting_drv.so
[ 5.258] (II) Module modesetting: vendor="X.Org Foundation"
[ 5.258] compiled for 1.18.4, module version = 1.18.4
[ 5.258] Module class: X.Org Video Driver
[ 5.258] ABI class: X.Org Video Driver, version 20.0
[ 5.258] (II) NVIDIA dlloader X Driver 375.39 Tue Jan 31 19:13:22 PST 2017
[ 5.258] (II) NVIDIA Unified Driver for all Supported NVIDIA GPUs
[ 5.258] (II) modesetting: Driver for Modesetting Kernel Drivers: kms
[ 5.258] (II) Loading sub module "fb"
[ 5.258] (II) LoadModule: "fb"
[ 5.258] (II) Loading /usr/lib/xorg/modules/libfb.so
[ 5.259] (II) Module fb: vendor="X.Org Foundation"
[ 5.259] compiled for 1.18.4, module version = 1.0.0
[ 5.259] ABI class: X.Org ANSI C Emulation, version 0.4
[ 5.259] (II) Loading sub module "wfb"
[ 5.259] (II) LoadModule: "wfb"
[ 5.259] (II) Loading /usr/lib/xorg/modules/libwfb.so
[ 5.259] (II) Module wfb: vendor="X.Org Foundation"
[ 5.259] compiled for 1.18.4, module version = 1.0.0
[ 5.259] ABI class: X.Org ANSI C Emulation, version 0.4
[ 5.259] (II) Loading sub module "ramdac"
[ 5.259] (II) LoadModule: "ramdac"
[ 5.259] (II) Module "ramdac" already built-in
[ 5.261] (II) modeset(G0): using drv /dev/dri/card1
[ 5.261] (II) NVIDIA(0): Creating default Display subsection in Screen section
"nvidia" for depth/fbbpp 24/32
[ 5.261] (==) NVIDIA(0): Depth 24, (==) framebuffer bpp 32
[ 5.261] (==) NVIDIA(0): RGB weight 888
[ 5.261] (==) NVIDIA(0): Default visual is TrueColor
[ 5.261] (==) NVIDIA(0): Using gamma correction (1.0, 1.0, 1.0)
[ 5.261] (**) NVIDIA(0): Option "ConstrainCursor" "off"
[ 5.261] (**) NVIDIA(0): Option "AllowEmptyInitialConfiguration" "on"
[ 5.261] (**) NVIDIA(0): Option "IgnoreDisplayDevices" "CRT"
[ 5.261] (**) NVIDIA(0): Enabling 2D acceleration
[ 5.447] (II) NVIDIA(0): NVIDIA GPU GeForce GTX 960M (GM107-A) at PCI:1:0:0 (GPU-0)
[ 5.447] (--) NVIDIA(0): Memory: 2097152 kBytes
[ 5.447] (--) NVIDIA(0): VideoBIOS: 82.07.82.00.2a
[ 5.447] (II) NVIDIA(0): Detected PCI Express Link width: 16X
[ 5.447] (II) NVIDIA(0): Validated MetaModes:
[ 5.447] (II) NVIDIA(0): "NULL"
[ 5.447] (II) NVIDIA(0): Virtual screen size determined to be 640 x 480
[ 5.447] (WW) NVIDIA(0): Unable to get display device for DPI computation.
[ 5.447] (==) NVIDIA(0): DPI set to (75, 75); computed from built-in default
[ 5.447] (==) modeset(G0): Depth 24, (==) framebuffer bpp 32
[ 5.447] (**) modeset(G0): Option "AccelMethod" "None"
[ 5.447] (==) modeset(G0): RGB weight 888
[ 5.447] (==) modeset(G0): Default visual is TrueColor
[ 5.447] (**) modeset(G0): glamor disabled
[ 5.447] (II) modeset(G0): ShadowFB: preferred YES, enabled YES
[ 5.447] (II) modeset(G0): Output eDP-1-1 has no monitor section
[ 5.449] (II) modeset(G0): Output DP-1-1 has no monitor section
[ 5.576] (II) modeset(G0): Output HDMI-1-1 has no monitor section
[ 5.578] (II) modeset(G0): Output DP-1-2 has no monitor section
[ 5.704] (II) modeset(G0): Output HDMI-1-2 has no monitor section
[ 5.704] (II) modeset(G0): EDID for output eDP-1-1
[ 5.704] (II) modeset(G0): Manufacturer: SHP Model: 143e Serial#: 0
[ 5.704] (II) modeset(G0): Year: 2015 Week: 40
[ 5.704] (II) modeset(G0): EDID Version: 1.4
[ 5.704] (II) modeset(G0): Digital Display Input
[ 5.704] (II) modeset(G0): 8 bits per channel
[ 5.704] (II) modeset(G0): Digital interface is DisplayPort
[ 5.704] (II) modeset(G0): Max Image Size [cm]: horiz.: 35 vert.: 19
[ 5.704] (II) modeset(G0): Gamma: 2.20
[ 5.704] (II) modeset(G0): No DPMS capabilities specified
[ 5.704] (II) modeset(G0): Supported color encodings: RGB 4:4:4 YCrCb 4:4:4
[ 5.704] (II) modeset(G0): Default color space is primary color space
[ 5.704] (II) modeset(G0): First detailed timing is preferred mode
[ 5.704] (II) modeset(G0): Preferred mode is native pixel format and refresh rate
[ 5.704] (II) modeset(G0): redX: 0.660 redY: 0.328 greenX: 0.203 greenY: 0.722
[ 5.704] (II) modeset(G0): blueX: 0.146 blueY: 0.048 whiteX: 0.306 whiteY: 0.328
[ 5.704] (II) modeset(G0): Manufacturer's mask: 0
[ 5.704] (II) modeset(G0): Supported detailed timing:
[ 5.704] (II) modeset(G0): clock: 533.2 MHz Image Size: 346 x 194 mm
[ 5.704] (II) modeset(G0): h_active: 3840 h_sync: 3888 h_sync_end 3920 h_blank_end 4000 h_border: 0
[ 5.704] (II) modeset(G0): v_active: 2160 v_sync: 2163 v_sync_end 2168 v_blanking: 2222 v_border: 0
[ 5.704] (II) modeset(G0): 7PHPT\82LQ156D1
[ 5.704] (II) modeset(G0): Unknown vendor-specific block 0
[ 5.704] (II) modeset(G0): EDID (in hex):
[ 5.704] (II) modeset(G0): 00ffffffffffff004d103e1400000000
[ 5.704] (II) modeset(G0): 28190104a52313780e0394a95434b825
[ 5.704] (II) modeset(G0): 0c4e5400000001010101010101010101
[ 5.704] (II) modeset(G0): 0101010101014dd000a0f0703e803020
[ 5.704] (II) modeset(G0): 35005ac2100000180000000000000000
[ 5.704] (II) modeset(G0): 00000000000000000000000000fe0037
[ 5.704] (II) modeset(G0): 50485054824c51313536443100000000
[ 5.704] (II) modeset(G0): 0002410328001200000b010a20200032
[ 5.704] (II) modeset(G0): Printing probed modes for output eDP-1-1
[ 5.704] (II) modeset(G0): Modeline "3840x2160"x60.0 533.25 3840 3888 3920 4000 2160 2163 2168 2222 -hsync -vsync (133.3 kHz eP)
[ 5.704] (II) modeset(G0): Modeline "2048x1536"x60.0 266.95 2048 2200 2424 2800 1536 1537 1540 1589 -hsync +vsync (95.3 kHz d)
[ 5.704] (II) modeset(G0): Modeline "1920x1440"x60.0 234.00 1920 2048 2256 2600 1440 1441 1444 1500 -hsync +vsync (90.0 kHz d)
[ 5.704] (II) modeset(G0): Modeline "1856x1392"x60.0 218.30 1856 1952 2176 2528 1392 1393 1396 1439 -hsync +vsync (86.4 kHz d)
[ 5.704] (II) modeset(G0): Modeline "1792x1344"x60.0 204.80 1792 1920 2120 2448 1344 1345 1348 1394 -hsync +vsync (83.7 kHz d)
[ 5.704] (II) modeset(G0): Modeline "1920x1200"x60.0 154.00 1920 1968 2000 2080 1200 1203 1209 1235 +hsync -vsync (74.0 kHz d)
[ 5.704] (II) modeset(G0): Modeline "1920x1080"x59.9 138.50 1920 1968 2000 2080 1080 1083 1088 1111 +hsync -vsync (66.6 kHz d)
[ 5.704] (II) modeset(G0): Modeline "1600x1200"x60.0 162.00 1600 1664 1856 2160 1200 1201 1204 1250 +hsync +vsync (75.0 kHz d)
[ 5.704] (II) modeset(G0): Modeline "1680x1050"x60.0 146.25 1680 1784 1960 2240 1050 1053 1059 1089 -hsync +vsync (65.3 kHz d)
[ 5.704] (II) modeset(G0): Modeline "1680x1050"x59.9 119.00 1680 1728 1760 1840 1050 1053 1059 1080 +hsync -vsync (64.7 kHz d)
[ 5.704] (II) modeset(G0): Modeline "1600x1024"x60.2 103.12 1600 1600 1656 1664 1024 1024 1029 1030 +hsync +vsync (62.0 kHz d)
[ 5.704] (II) modeset(G0): Modeline "1400x1050"x60.0 122.00 1400 1488 1640 1880 1050 1052 1064 1082 +hsync +vsync (64.9 kHz d)
[ 5.704] (II) modeset(G0): Modeline "1280x1024"x60.0 108.00 1280 1328 1440 1688 1024 1025 1028 1066 +hsync +vsync (64.0 kHz d)
[ 5.704] (II) modeset(G0): Modeline "1440x900"x59.9 106.50 1440 1520 1672 1904 900 903 909 934 -hsync +vsync (55.9 kHz d)
[ 5.704] (II) modeset(G0): Modeline "1280x960"x60.0 108.00 1280 1376 1488 1800 960 961 964 1000 +hsync +vsync (60.0 kHz d)
[ 5.704] (II) modeset(G0): Modeline "1360x768"x59.8 84.75 1360 1432 1568 1776 768 771 781 798 -hsync +vsync (47.7 kHz d)
[ 5.704] (II) modeset(G0): Modeline "1360x768"x60.0 72.00 1360 1408 1440 1520 768 771 781 790 +hsync -vsync (47.4 kHz d)
[ 5.704] (II) modeset(G0): Modeline "1152x864"x60.0 81.62 1152 1216 1336 1520 864 865 868 895 -hsync +vsync (53.7 kHz d)
[ 5.704] (II) modeset(G0): Modeline "1024x768"x120.1 133.47 1024 1100 1212 1400 768 768 770 794 doublescan -hsync +vsync (95.3 kHz d)
[ 5.704] (II) modeset(G0): Modeline "1024x768"x60.0 65.00 1024 1048 1184 1344 768 771 777 806 -hsync -vsync (48.4 kHz d)
[ 5.704] (II) modeset(G0): Modeline "960x720"x120.0 117.00 960 1024 1128 1300 720 720 722 750 doublescan -hsync +vsync (90.0 kHz d)
[ 5.704] (II) modeset(G0): Modeline "928x696"x120.1 109.15 928 976 1088 1264 696 696 698 719 doublescan -hsync +vsync (86.4 kHz d)
[ 5.704] (II) modeset(G0): Modeline "896x672"x120.0 102.40 896 960 1060 1224 672 672 674 697 doublescan -hsync +vsync (83.7 kHz d)
[ 5.704] (II) modeset(G0): Modeline "960x600"x120.0 77.00 960 984 1000 1040 600 601 604 617 doublescan +hsync -vsync (74.0 kHz d)
[ 5.704] (II) modeset(G0): Modeline "960x540"x120.0 69.25 960 984 1000 1040 540 541 544 555 doublescan +hsync -vsync (66.6 kHz d)
[ 5.704] (II) modeset(G0): Modeline "800x600"x120.0 81.00 800 832 928 1080 600 600 602 625 doublescan +hsync +vsync (75.0 kHz d)
[ 5.704] (II) modeset(G0): Modeline "800x600"x60.3 40.00 800 840 968 1056 600 601 605 628 +hsync +vsync (37.9 kHz d)
[ 5.704] (II) modeset(G0): Modeline "800x600"x56.2 36.00 800 824 896 1024 600 601 603 625 +hsync +vsync (35.2 kHz d)
[ 5.704] (II) modeset(G0): Modeline "840x525"x120.0 73.12 840 892 980 1120 525 526 529 544 doublescan -hsync +vsync (65.3 kHz d)
[ 5.704] (II) modeset(G0): Modeline "840x525"x119.8 59.50 840 864 880 920 525 526 529 540 doublescan +hsync -vsync (64.7 kHz d)
[ 5.704] (II) modeset(G0): Modeline "800x512"x120.3 51.56 800 800 828 832 512 512 514 515 doublescan +hsync +vsync (62.0 kHz d)
[ 5.704] (II) modeset(G0): Modeline "700x525"x120.0 61.00 700 744 820 940 525 526 532 541 doublescan +hsync +vsync (64.9 kHz d)
[ 5.704] (II) modeset(G0): Modeline "640x512"x120.0 54.00 640 664 720 844 512 512 514 533 doublescan +hsync +vsync (64.0 kHz d)
[ 5.704] (II) modeset(G0): Modeline "720x450"x119.8 53.25 720 760 836 952 450 451 454 467 doublescan -hsync +vsync (55.9 kHz d)
[ 5.704] (II) modeset(G0): Modeline "640x480"x120.0 54.00 640 688 744 900 480 480 482 500 doublescan +hsync +vsync (60.0 kHz d)
[ 5.704] (II) modeset(G0): Modeline "640x480"x59.9 25.18 640 656 752 800 480 490 492 525 -hsync -vsync (31.5 kHz d)
[ 5.704] (II) modeset(G0): Modeline "680x384"x119.6 42.38 680 716 784 888 384 385 390 399 doublescan -hsync +vsync (47.7 kHz d)
[ 5.704] (II) modeset(G0): Modeline "680x384"x119.9 36.00 680 704 720 760 384 385 390 395 doublescan +hsync -vsync (47.4 kHz d)
[ 5.704] (II) modeset(G0): Modeline "576x432"x120.1 40.81 576 608 668 760 432 432 434 447 doublescan -hsync +vsync (53.7 kHz d)
[ 5.704] (II) modeset(G0): Modeline "512x384"x120.0 32.50 512 524 592 672 384 385 388 403 doublescan -hsync -vsync (48.4 kHz d)
[ 5.704] (II) modeset(G0): Modeline "400x300"x120.6 20.00 400 420 484 528 300 300 302 314 doublescan +hsync +vsync (37.9 kHz d)
[ 5.704] (II) modeset(G0): Modeline "400x300"x112.7 18.00 400 412 448 512 300 300 301 312 doublescan +hsync +vsync (35.2 kHz d)
[ 5.704] (II) modeset(G0): Modeline "320x240"x120.1 12.59 320 328 376 400 240 245 246 262 doublescan -hsync -vsync (31.5 kHz d)
[ 5.707] (II) modeset(G0): EDID for output DP-1-1
[ 5.832] (II) modeset(G0): EDID for output HDMI-1-1
[ 5.834] (II) modeset(G0): EDID for output DP-1-2
[ 5.960] (II) modeset(G0): EDID for output HDMI-1-2
[ 5.960] (II) modeset(G0): Using default gamma of (1.0, 1.0, 1.0) unless otherwise stated.
[ 5.960] (==) modeset(G0): DPI set to (96, 96)
[ 5.960] (II) Loading sub module "fb"
[ 5.960] (II) LoadModule: "fb"
[ 5.960] (II) Loading /usr/lib/xorg/modules/libfb.so
[ 5.960] (II) Module fb: vendor="X.Org Foundation"
[ 5.960] compiled for 1.18.4, module version = 1.0.0
[ 5.960] ABI class: X.Org ANSI C Emulation, version 0.4
[ 5.960] (II) Loading sub module "shadow"
[ 5.960] (II) LoadModule: "shadow"
[ 5.960] (II) Loading /usr/lib/xorg/modules/libshadow.so
[ 5.960] (II) Module shadow: vendor="X.Org Foundation"
[ 5.960] compiled for 1.18.4, module version = 1.1.0
[ 5.960] ABI class: X.Org ANSI C Emulation, version 0.4
[ 5.960] (--) Depth 24 pixmap format is 32 bpp
[ 5.961] (==) modeset(G0): Backing store enabled
[ 5.961] (==) modeset(G0): Silken mouse enabled
[ 5.961] (II) modeset(G0): RandR 1.2 enabled, ignore the following RandR disabled message.
[ 5.961] (==) modeset(G0): DPMS enabled
[ 5.961] (WW) modeset(G0): Option "AllowEmptyInitialConfiguration" is not used
[ 5.961] (WW) modeset(G0): Option "IgnoreDisplayDevices" is not used
[ 6.252] (II) NVIDIA: Using 12288.00 MB of virtual memory for indirect memory
[ 6.252] (II) NVIDIA: access.
[ 6.254] (WW) NVIDIA(0): ACPI: AC power state information is not available under
[ 6.254] (WW) NVIDIA(0): /sys/class/power_supply/ , nor under
[ 6.255] (WW) NVIDIA(0): /proc/acpi/ac_adapter/
[ 6.269] (II) NVIDIA(0): Built-in logo is bigger than the screen.
[ 6.269] (II) NVIDIA(0): Setting mode "NULL"
[ 6.272] (==) NVIDIA(0): Disabling shared memory pixmaps
[ 6.272] (==) NVIDIA(0): Backing store enabled
[ 6.272] (==) NVIDIA(0): Silken mouse enabled
[ 6.272] (==) NVIDIA(0): DPMS enabled
[ 6.272] (II) Loading sub module "dri2"
[ 6.272] (II) LoadModule: "dri2"
[ 6.272] (II) Module "dri2" already built-in
[ 6.272] (II) NVIDIA(0): [DRI2] Setup complete
[ 6.272] (II) NVIDIA(0): [DRI2] VDPAU driver: nvidia
[ 6.272] (--) RandR disabled
[ 6.274] (II) SELinux: Disabled on system
[ 6.275] (II) Initializing extension GLX
[ 6.275] (II) Indirect GLX disabled.
[ 6.275] (II) modeset(G0): Damage tracking initialized
[ 6.299] (II) config/udev: Adding input device Power Button (/dev/input/event3)
(snip)
因长度而截断（正文限制为 30k 个字符）；完整日志在此：https://gist.github.com/elistevens/2b2d48dfb9eac15dffed2b97e4ef56a8
编辑 2：NVidia 驱动程序版本375.39-0ubuntu0~gpu16.04.2，uname -a 报告Linux xps 4.4.0-66-generic #87-Ubuntu SMP Fri Mar 3 15:29:05 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
答案1
我也有同样的问题。有一个错误。
https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/1292830
我花了一段时间才找到它。一个快速的解决方法：
compiz --replace
答案2
我可以确认这个错误。
我还有一块 Nvidia 显卡，Geforce 440M（不是 optimus 版本）
使用任何 Nvidia 驱动程序都会导致出现错误。通常它发生在从睡眠状态唤醒后，有时发生在某些应用程序全屏后。
不过我可以回答你的问题。我该如何摆脱故障边框、阴影和按钮？很简单。转到 Unity 调整工具 -> 主题，然后选择另一个主题，然后再次选择当前主题，然后关闭窗口。故障消失了。（至少对我来说）
这不是最终的解决方案，因为故障可能会在同一个会话中再次发生。如果确实如此，只需重复我所述的过程即可。
答案3
我知道这不是答案，但可能有助于阐明这个问题。
几天前，我在一台要捐赠给慈善机构的旧笔记本电脑上安装了 32 位 budgie-remix。
安装完毕后，在确保笔记本电脑可用的过程中，我到处抓取一些有用的软件……好吧；我真的很喜欢 Budgie DE。
我把它在我的计算机上启动并运行，从那天（昨天）起，我只需合上盖子，打开它，就可以得到一台功能齐全、无故障的笔记本电脑。
我的猜测是，这是一个与 Unity 相关的错误，而不是图形堆栈问题。
我的看法。很多人批评 Unity，而我喜欢它。但我更喜欢无故障的环境。如果您遇到此错误，请尝试使用其他 DE。迫不及待地想要 18.04！