A side effect is observed. After the fresh installation with the safe graphics mode, the system cannot boot into the desktop. It shows a black screen with the screen afterimage. ## Some ERRORs on the dmesg ## [ 4.395661] Adding 2097148k swap on /swapfile. Priority:-2 extents:6 across:2260988k SSFS [ 4.400734] systemd[1]: Activated swap /swapfile. [ 4.400774] systemd[1]: Reached target Swap. [ 4.485206] systemd[1]: Started Journal Service. [ 4.492408] systemd-journald[983]: Received client request to flush runtime journal. [ 4.781984] ioatdma: Intel(R) QuickData Technology Driver 5.00 [ 4.782280] ioatdma 0000:00:04.0: enabling device (0004 -> 0006) [ 4.797068] ioatdma 0000:00:04.1: enabling device (0004 -> 0006) [ 4.812829] ioatdma 0000:00:04.2: enabling device (0004 -> 0006) [ 4.829266] ioatdma 0000:00:04.3: enabling device (0004 -> 0006) [ 4.842555] ioatdma 0000:00:04.4: enabling device (0004 -> 0006) [ 4.856022] ioatdma 0000:00:04.5: enabling device (0004 -> 0006) [ 4.869067] ioatdma 0000:00:04.6: enabling device (0004 -> 0006) [ 4.882814] ioatdma 0000:00:04.7: enabling device (0004 -> 0006) [ 4.895948] ioatdma 0000:80:04.0: enabling device (0004 -> 0006) [ 4.914060] ioatdma 0000:80:04.1: enabling device (0004 -> 0006) [ 4.927259] ioatdma 0000:80:04.2: enabling device (0004 -> 0006) [ 4.938517] ioatdma 0000:80:04.3: enabling device (0004 -> 0006) [ 4.950204] ioatdma 0000:80:04.4: enabling device (0004 -> 0006) [ 4.961583] ioatdma 0000:80:04.5: enabling device (0004 -> 0006) [ 4.976231] ioatdma 0000:80:04.6: enabling device (0004 -> 0006) [ 4.985987] RAPL PMU: API unit is 2^-32 Joules, 2 fixed counters, 655360 ms ovfl timer [ 4.985988] RAPL PMU: hw unit of domain package 2^-14 Joules [ 4.985989] RAPL PMU: hw unit of domain dram 2^-16 Joules [ 4.989200] ioatdma 0000:80:04.7: enabling device (0004 -> 0006) [ 5.014957] cryptd: max_cpu_qlen set to 1000 [ 5.024763] AVX2 version of gcm_enc/dec engaged. [ 5.024764] AES CTR mode by8 optimization enabled [ 5.061518] checking generic (a0000000 870000) vs hw (a0000000 10000000) [ 5.061520] fb0: switching to nouveaufb from EFI VGA [ 5.061852] Console: switching to colour dummy device 80x25 [ 5.062143] nouveau 0000:3b:00.0: NVIDIA TU102 (162000a1) [ 5.129544] nouveau 0000:3b:00.0: bios: version 90.02.30.00.02 [ 5.130601] nouveau 0000:3b:00.0: fb: 24576 MiB GDDR6 [ 5.171088] snd_hda_intel 0000:00:1f.3: enabling device (0140 -> 0142) [ 5.171464] snd_hda_intel 0000:3b:00.1: enabling device (0140 -> 0142) [ 5.171507] snd_hda_intel 0000:3b:00.1: Disabling MSI [ 5.171562] snd_hda_intel 0000:3b:00.1: Handle vga_switcheroo audio client [ 5.171635] [TTM] Zone kernel: Available graphics memory: 49303280 KiB [ 5.171636] [TTM] Zone dma32: Available graphics memory: 2097152 KiB [ 5.171637] [TTM] Initializing pool allocator [ 5.171649] [TTM] Initializing DMA pool allocator [ 5.171666] nouveau 0000:3b:00.0: DRM: VRAM: 24576 MiB [ 5.171667] nouveau 0000:3b:00.0: DRM: GART: 536870912 MiB [ 5.171670] nouveau 0000:3b:00.0: DRM: BIT table 'A' not found [ 5.171673] nouveau 0000:3b:00.0: DRM: BIT table 'L' not found [ 5.171674] nouveau 0000:3b:00.0: DRM: TMDS table version 2.0 [ 5.171675] nouveau 0000:3b:00.0: DRM: DCB version 4.1 [ 5.171677] nouveau 0000:3b:00.0: DRM: DCB outp 00: 02800f66 04600020 [ 5.171678] nouveau 0000:3b:00.0: DRM: DCB outp 01: 02000f62 00020020 [ 5.171679] nouveau 0000:3b:00.0: DRM: DCB outp 02: 02811f56 04600010 [ 5.171680] nouveau 0000:3b:00.0: DRM: DCB outp 03: 02011f52 00020010 [ 5.171681] nouveau 0000:3b:00.0: DRM: DCB outp 04: 04822f76 04600010 [ 5.171682] nouveau 0000:3b:00.0: DRM: DCB outp 05: 04022f72 00020010 [ 5.171682] nouveau 0000:3b:00.0: DRM: DCB outp 06: 04833f86 04600020 [ 5.171683] nouveau 0000:3b:00.0: DRM: DCB outp 08: 01844f36 04600010 [ 5.171684] nouveau 0000:3b:00.0: DRM: DCB outp 09: 01044f32 00020010 [ 5.171685] nouveau 0000:3b:00.0: DRM: DCB conn 00: 00020046 [ 5.171686] nouveau 0000:3b:00.0: DRM: DCB conn 01: 00010146 [ 5.171686] nouveau 0000:3b:00.0: DRM: DCB conn 02: 01000246 [ 5.171687] nouveau 0000:3b:00.0: DRM: DCB conn 03: 02000371 [ 5.171688] nouveau 0000:3b:00.0: DRM: DCB conn 04: 00001446 [ 5.171689] nouveau 0000:3b:00.0: DRM: DCB conn 05: 00000560 [ 5.171935] nouveau 0000:3b:00.0: DRM: failed to create kernel channel, -22 [ 5.172095] nouveau 0000:3b:00.0: DRM: MM: using COPY for buffer copies [ 5.192681] snd_hda_codec_realtek hdaudioC0D0: autoconfig for ALC662 rev3: line_outs=1 (0x14/0x0/0x0/0x0/0x0) type:line [ 5.192683] snd_hda_codec_realtek hdaudioC0D0: speaker_outs=1 (0x15/0x0/0x0/0x0/0x0) [ 5.192684] snd_hda_codec_realtek hdaudioC0D0: hp_outs=1 (0x1b/0x0/0x0/0x0/0x0) [ 5.192685] snd_hda_codec_realtek hdaudioC0D0: mono: mono_out=0x0 [ 5.192685] snd_hda_codec_realtek hdaudioC0D0: inputs: [ 5.192686] snd_hda_codec_realtek hdaudioC0D0: Front Mic=0x19 [ 5.192687] snd_hda_codec_realtek hdaudioC0D0: Rear Mic=0x18 [ 5.192688] snd_hda_codec_realtek hdaudioC0D0: Line=0x1a [ 5.203347] input: HDA Intel PCH Front Mic as /devices/pci0000:00/0000:00:1f.3/sound/card0/input6 [ 5.203402] input: HDA Intel PCH Rear Mic as /devices/pci0000:00/0000:00:1f.3/sound/card0/input7 [ 5.203443] input: HDA Intel PCH Line as /devices/pci0000:00/0000:00:1f.3/sound/card0/input8 [ 5.203483] input: HDA Intel PCH Line Out as /devices/pci0000:00/0000:00:1f.3/sound/card0/input9 [ 5.203515] input: HDA Intel PCH Front Headphone as /devices/pci0000:00/0000:00:1f.3/sound/card0/input10 [ 5.263804] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013). [ 5.263805] [drm] Driver supports precise vblank timestamp query. [ 5.383022] EDAC MC0: Giving out device to module skx_edac controller Skylake Socket#0 IMC#0: DEV 0000:3a:0a.0 (INTERRUPT) [ 5.383055] EDAC MC1: Giving out device to module skx_edac controller Skylake Socket#0 IMC#1: DEV 0000:3a:0c.0 (INTERRUPT) [ 5.383093] EDAC MC2: Giving out device to module skx_edac controller Skylake Socket#1 IMC#0: DEV 0000:ae:0a.0 (INTERRUPT) [ 5.383143] EDAC MC3: Giving out device to module skx_edac controller Skylake Socket#1 IMC#1: DEV 0000:ae:0c.0 (INTERRUPT) [ 5.475708] intel_rapl_common: Found RAPL domain package [ 5.475717] intel_rapl_common: Found RAPL domain dram [ 5.475718] intel_rapl_common: DRAM domain energy unit 15300pj [ 5.476857] intel_rapl_common: Found RAPL domain package [ 5.476861] intel_rapl_common: Found RAPL domain dram [ 5.476863] intel_rapl_common: DRAM domain energy unit 15300pj [ 5.527048] nouveau 0000:3b:00.0: DRM: allocated 1920x1080 fb: 0x200000, bo 00000000fcf3b1cf [ 5.539708] fbcon: nouveaudrmfb (fb0) is primary device [ 5.539773] Console: switching to colour frame buffer device 240x67 [ 5.539811] nouveau 0000:3b:00.0: fb0: nouveaudrmfb frame buffer device [ 5.603792] [drm] Initialized nouveau 1.3.1 20120801 for 0000:3b:00.0 on minor 0 [ 5.724209] nouveau 0000:3b:00.0: disp: chid 1 stat 00005080 reason 5 [INVALID_STATE] mthd 0200 data 00000001 code 0000002e [ 5.724214] nouveau 0000:3b:00.0: disp: Window 1: [ 5.724216] nouveau 0000:3b:00.0: disp: 0200: fbe7dfbf -> 00000001 [ 5.724219] nouveau 0000:3b:00.0: disp: 020c: 00000000 [ 5.724222] nouveau 0000:3b:00.0: disp: 0210: 00000000 [ 5.724224] nouveau 0000:3b:00.0: disp: 0214: 00000000 [ 5.724227] nouveau 0000:3b:00.0: disp: 0218: 00000000 [ 5.724229] nouveau 0000:3b:00.0: disp: 021c: 00000000 -> f0000000 [ 5.724232] nouveau 0000:3b:00.0: disp: 0220: 00000000 -> 00000060 [ 5.724234] nouveau 0000:3b:00.0: disp: 0224: 04380780 [ 5.724237] nouveau 0000:3b:00.0: disp: 0228: 00000010 [ 5.724239] nouveau 0000:3b:00.0: disp: 022c: 000000cf [ 5.724241] nouveau 0000:3b:00.0: disp: 0230: 00000080 -> 00000078 [ 5.724244] nouveau 0000:3b:00.0: disp: 0234: 00000000 [ 5.724246] nouveau 0000:3b:00.0: disp: 0238: 00000000 [ 5.724249] nouveau 0000:3b:00.0: disp: 0240: 45564144 -> fb000000 [ 5.724251] nouveau 0000:3b:00.0: disp: 0244: 00000000 [ 5.724254] nouveau 0000:3b:00.0: disp: 0248: 00000000 [ 5.724256] nouveau 0000:3b:00.0: disp: 024c: 00000000 [ 5.724258] nouveau 0000:3b:00.0: disp: 0250: 00000000 [ 5.724261] nouveau 0000:3b:00.0: disp: 0254: 00000000 [ 5.724263] nouveau 0000:3b:00.0: disp: 0260: 00000000 -> 00002000 [ 5.724266] nouveau 0000:3b:00.0: disp: 0264: 00000000 [ 5.724268] nouveau 0000:3b:00.0: disp: 0268: 00000000 [ 5.724270] nouveau 0000:3b:00.0: disp: 026c: 00000000 [ 5.724273] nouveau 0000:3b:00.0: disp: 0270: 00000000 [ 5.724276] nouveau 0000:3b:00.0: disp: 0274: 00000000 [ 5.724278] nouveau 0000:3b:00.0: disp: 0280: 00000000 [ 5.724281] nouveau 0000:3b:00.0: disp: 0284: 00000000 [ 5.724283] nouveau 0000:3b:00.0: disp: 0288: 00000000 [ 5.724285] nouveau 0000:3b:00.0: disp: 028c: 00000000 [ 5.724288] nouveau 0000:3b:00.0: disp: 0290: 00000000 [ 5.724290] nouveau 0000:3b:00.0: disp: 0298: 04380780 [ 5.724293] nouveau 0000:3b:00.0: disp: 029c: 00000000 [ 5.724295] nouveau 0000:3b:00.0: disp: 02a0: 00000000 [ 5.724297] nouveau 0000:3b:00.0: disp: 02a4: 04380780 [ 5.724300] nouveau 0000:3b:00.0: disp: 02a8: 00000011 [ 5.724302] nouveau 0000:3b:00.0: disp: 02ac: 00000000 [ 5.724305] nouveau 0000:3b:00.0: disp: 02b0: 00000000 [ 5.724307] nouveau 0000:3b:00.0: disp: 02b4: 00000000 [ 5.724309] nouveau 0000:3b:00.0: disp: 02b8: 00000000 [ 5.724312] nouveau 0000:3b:00.0: disp: 02bc: 00000000 [ 5.724314] nouveau 0000:3b:00.0: disp: 02c0: 00000000 [ 5.724317] nouveau 0000:3b:00.0: disp: 02c4: 00000000 [ 5.724319] nouveau 0000:3b:00.0: disp: 02c8: 00000000 [ 5.724321] nouveau 0000:3b:00.0: disp: 02cc: 00000000 [ 5.724324] nouveau 0000:3b:00.0: disp: 02d0: 00000000 [ 5.724326] nouveau 0000:3b:00.0: disp: 02d4: 00000000 [ 5.724328] nouveau 0000:3b:00.0: disp: 02d8: 00000000 [ 5.724331] nouveau 0000:3b:00.0: disp: 02dc: 00000000 [ 5.724333] nouveau 0000:3b:00.0: disp: 02e0: 00000000 [ 5.724336] nouveau 0000:3b:00.0: disp: 02e4: 00000000 [ 5.724338] nouveau 0000:3b:00.0: disp: 02e8: 00000000 [ 5.724341] nouveau 0000:3b:00.0: disp: 02ec: 00010000 -> 00000ff0 [ 5.724343] nouveau 0000:3b:00.0: disp: 02f0: 00000000 -> 000000ff [ 5.724345] nouveau 0000:3b:00.0: disp: 02f4: 00000001 -> 00007722 [ 5.724348] nouveau 0000:3b:00.0: disp: 02f8: 00000000 -> ffff0000 [ 5.724350] nouveau 0000:3b:00.0: disp: 02fc: 00000000 -> ffff0000 [ 5.724353] nouveau 0000:3b:00.0: disp: 0300: 00000000 -> ffff0000 [ 5.724355] nouveau 0000:3b:00.0: disp: 0304: 00000000 -> ffff0000 [ 5.724358] nouveau 0000:3b:00.0: disp: 0308: 00000000 -> 00000001 [ 5.724360] nouveau 0000:3b:00.0: disp: 0310: 00000000 [ 5.724363] nouveau 0000:3b:00.0: disp: 0314: 00000000 [ 5.724365] nouveau 0000:3b:00.0: disp: 0318: 00000000 [ 5.724368] nouveau 0000:3b:00.0: disp: 031c: 00000000 [ 5.724370] nouveau 0000:3b:00.0: disp: 0320: 00000000 [ 5.724373] nouveau 0000:3b:00.0: disp: 0324: 00000000 [ 5.724375] nouveau 0000:3b:00.0: disp: 0328: 00000000 [ 5.724377] nouveau 0000:3b:00.0: disp: 032c: 00000000 [ 5.724380] nouveau 0000:3b:00.0: disp: 033c: 00000000 [ 5.724382] nouveau 0000:3b:00.0: disp: 0340: 00000000 [ 5.724385] nouveau 0000:3b:00.0: disp: 0344: 00000000 [ 5.724387] nouveau 0000:3b:00.0: disp: 0348: 00000000 [ 5.724389] nouveau 0000:3b:00.0: disp: 034c: 00000000 [ 5.724392] nouveau 0000:3b:00.0: disp: 0350: 00000000 [ 5.724394] nouveau 0000:3b:00.0: disp: 0354: 00000000 [ 5.724396] nouveau 0000:3b:00.0: disp: 0358: 00000000 [ 5.724399] nouveau 0000:3b:00.0: disp: 0364: 00001300 [ 5.724401] nouveau 0000:3b:00.0: disp: 0368: 00000002 [ 5.724404] nouveau 0000:3b:00.0: disp: 036c: 00000000 [ 5.724406] nouveau 0000:3b:00.0: disp: 0370: 00000001 [ 5.724408] nouveau 0000:3b:00.0: disp: 0374: 00000001 [ 5.724411] nouveau 0000:3b:00.0: disp: 0380: 00000000 [ 5.729550] audit: type=1400 audit(1596615250.533:2): apparmor="STATUS" operation="profile_load" profile="unconfined" name="libreoffice-senddoc" pid=1475 comm="apparmor_parser" [ 5.729587] audit: type=1400 audit(1596615250.533:3): apparmor="STATUS" operation="profile_load" profile="unconfined" name="libreoffice-xpdfimport" pid=1477 comm="apparmor_parser" [ 5.729898] audit: type=1400 audit(1596615250.533:4): apparmor="STATUS" operation="profile_load" profile="unconfined" name="lsb_release" pid=1485 comm="apparmor_parser" [ 5.730046] audit: type=1400 audit(1596615250.533:5): apparmor="STATUS" operation="profile_load" profile="unconfined" name="nvidia_modprobe" pid=1484 comm="apparmor_parser" [ 5.730048] audit: type=1400 audit(1596615250.533:6): apparmor="STATUS" operation="profile_load" profile="unconfined" name="nvidia_modprobe//kmod" pid=1484 comm="apparmor_parser" [ 5.730425] audit: type=1400 audit(1596615250.533:7): apparmor="STATUS" operation="profile_load" profile="unconfined" name="ippusbxd" pid=1478 comm="apparmor_parser" [ 5.730459] audit: type=1400 audit(1596615250.533:8): apparmor="STATUS" operation="profile_load" profile="unconfined" name="libreoffice-oopslash" pid=1479 comm="apparmor_parser" [ 5.730542] audit: type=1400 audit(1596615250.533:9): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/lib/snapd/snap-confine" pid=1483 comm="apparmor_parser" [ 5.730545] audit: type=1400 audit(1596615250.533:10): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/lib/snapd/snap-confine//mount-namespace-capture-helper" pid=1483 comm="apparmor_parser" [ 6.020370] input: HDA NVidia HDMI/DP,pcm=3 as /devices/pci0000:3a/0000:3a:00.0/0000:3b:00.1/sound/card1/input11 [ 6.020414] input: HDA NVidia HDMI/DP,pcm=7 as /devices/pci0000:3a/0000:3a:00.0/0000:3b:00.1/sound/card1/input12 [ 6.020452] input: HDA NVidia HDMI/DP,pcm=8 as /devices/pci0000:3a/0000:3a:00.0/0000:3b:00.1/sound/card1/input13 [ 6.020487] input: HDA NVidia HDMI/DP,pcm=9 as /devices/pci0000:3a/0000:3a:00.0/0000:3b:00.1/sound/card1/input14 [ 7.723797] nouveau 0000:3b:00.0: DRM: core notifier timeout [ 9.723799] nouveau 0000:3b:00.0: DRM: wndw-0: timeout [ 11.962431] nouveau 0000:3b:00.0: DRM: core notifier timeout [ 13.962532] nouveau 0000:3b:00.0: DRM: wndw-0: timeout [ 14.584854] kauditd_printk_skb: 25 callbacks suppressed [ 14.584856] audit: type=1400 audit(1596615259.389:36): apparmor="DENIED" operation="capable" profile="/usr/sbin/cups-browsed" pid=1665 comm="cups-browsed" capability=23 capname="sys_nice" [ 16.796147] rfkill: input handler disabled [ 17.780142] igb 0000:02:00.0 eno1: igb: eno1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX [ 17.887912] IPv6: ADDRCONF(NETDEV_CHANGE): eno1: link becomes ready [ 19.238609] nouveau 0000:3b:00.0: DRM: wndw-0: timeout [ 21.292150] nouveau 0000:3b:00.0: DRM: wndw-0: timeout [ 23.292266] nouveau 0000:3b:00.0: DRM: core notifier timeout [ 25.363608] nouveau 0000:3b:00.0: DRM: wndw-0: timeout [ 33.259537] nouveau 0000:3b:00.0: DRM: wndw-0: timeout [ 35.274150] nouveau 0000:3b:00.0: DRM: wndw-0: timeout [ 57.528019] nouveau 0000:3b:00.0: DRM: wndw-0: timeout [ 117.540393] nouveau 0000:3b:00.0: DRM: wndw-0: timeout [ 177.543917] nouveau 0000:3b:00.0: DRM: wndw-0: timeout [ 237.541938] nouveau 0000:3b:00.0: DRM: wndw-0: timeout [ 297.543633] nouveau 0000:3b:00.0: DRM: wndw-0: timeout [ 319.381331] nouveau 0000:3b:00.0: DRM: wndw-0: timeout [ 321.393453] nouveau 0000:3b:00.0: DRM: core notifier timeout [ 323.393457] nouveau 0000:3b:00.0: DRM: wndw-0: timeout [ 325.394449] nouveau 0000:3b:00.0: DRM: core notifier timeout