Erros gráficos para as bordas das janelas, botões após a atualização 2017-03-06, 16.04 [duplicate]

Question

Ontem, adicionei o Sane PPA (drivers de scanner), atualização do aptitude + upgrade e reiniciei quando solicitado. A reinicialização não foi concluída (ela ficou na tela com o "Ubuntu" e os pontos vermelhos / brancos por 15 minutos), então liguei a máquina.

Agora vejo o que parece ser uma memória de vídeo não inicializada, em que as sombras da janela e os botões de canto devem estar:

EstouemumDellXPS15"com uma NVidia 960M, executando os drivers gráficos PPA (nvidia-375 375.39-0ubuntu0 ~ gpu16.04.2), caso contrário, é um bom repositório 16.04 em termos de pacotes.

Eu posso desenterrar registros de quais pacotes foram atualizados com a atualização do aptitude de ontem, se for relevante.

Minhas perguntas:

• Este é um problema conhecido?
• Existe uma solução ou correção?
• Se não, qual é o melhor lugar para relatar o bug?

Editar para adicionar informações solicitadas:

$ 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]

Mas o FYI também tem:

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.log:

    [     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):  7PHPTLQ156D1
[     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)

Truncado por tamanho (corpo de texto limitado a 30k caracteres); log completo aqui: link

Editar 2: Versão do driver NVidia 375.39-0ubuntu0~gpu16.04.2 , uname -a relata 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

    

Answer 1

Eu tenho o mesmo. Existe um bug.

link

Demorei um pouco para encontrá-lo. Uma solução rápida:

compiz --replace

    

Answer 2

Eu posso confirmar esse bug.

Eu também tenho uma placa gráfica Nvidia, uma Geforce 440M (não a versão otimizada)

Usando qualquer um dos drivers da Nvidia resulta em bug mostrado. Geralmente acontece depois de acordar do sono, algumas vezes depois que algum aplicativo entra em tela cheia.

Eu posso responder sua pergunta embora. Como me livrar das bordas, sombras e botões? Fácil. Ir para a ferramenta de ajuste de unidade - > temas, escolha outro tema e, em seguida, seu tema atual novamente e feche a janela. A falha desapareceu. (Pelo menos para mim)

Esta não é uma solução definitiva, já que a falha pode ocorrer novamente na mesma sessão. Se isso acontecer, basta repetir o processo que afirmei.

    

Answer 3

Eu sei que isso não é uma resposta, mas pode ajudar a esclarecer a questão.

Alguns dias atrás, instalei o budgie-remix 32bit em um laptop antigo que eu estava dando para uma instituição de caridade.

Após a instalação e no processo de garantir que o laptop seja utilizável, pegue algum software útil aqui e ali ... bem; Eu cresci muito afeiçoado ao Budgie DE.

Eu tenho tudo em funcionamento na minha máquina, e desde aquele dia (ontem) eu consegui fechar a tampa e abri-la para um laptop totalmente funcional e sem falhas.

Meu palpite é que isso é um erro relacionado ao Unity, em vez de um problema de pilha de gráficos.

Meus 2 centavos. Muitas pessoas batem em Unity, eu amo isso. Mas eu amo muito mais um ambiente sem falhas. Se você tiver esse bug, tente usar outro DE. Não posso esperar pelo 18.04!