get a black screen occasionally

unicorn

unicorn

I get a black screen occasionally
dmesg
Code: 
Copyright (c) 1992-2021 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
    The Regents of the University of California. All rights reserved.
FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 13.2-RELEASE-p1 GENERIC amd64
FreeBSD clang version 14.0.5 (https://github.com/llvm/llvm-project.git llvmorg-14.0.5-0-gc12386ae247c)
VT(efifb): resolution 800x600
module_register: cannot register tmpfs from kernel; already loaded from tmpfs.ko
Module tmpfs failed to register: 17
CPU: Intel(R) Core(TM) i7-3537U CPU @ 2.00GHz (2494.49-MHz K8-class CPU)
  Origin="GenuineIntel"  Id=0x306a9  Family=0x6  Model=0x3a  Stepping=9
  Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
  Features2=0x7fbae3bf<SSE3,PCLMULQDQ,DTES64,MON,DS_CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,TSCDLT,AESNI,XSAVE,OSXSAVE,AVX,F16C,RDRAND>
  AMD Features=0x28100800<SYSCALL,NX,RDTSCP,LM>
  AMD Features2=0x1<LAHF>
  Structured Extended Features=0x281<FSGSBASE,SMEP,ERMS>
  XSAVE Features=0x1<XSAVEOPT>
  VT-x: (disabled in BIOS) PAT,HLT,MTF,PAUSE,EPT,UG,VPID
  TSC: P-state invariant, performance statistics
real memory  = 8589934592 (8192 MB)
avail memory = 7166799872 (6834 MB)
Event timer "LAPIC" quality 600
ACPI APIC Table: <ALASKA A M I>
FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs
FreeBSD/SMP: 1 package(s) x 2 core(s) x 2 hardware threads
random: registering fast source Intel Secure Key RNG
random: fast provider: "Intel Secure Key RNG"
random: unblocking device.
ioapic0 <Version 2.0> irqs 0-23
Launching APs: 1 3 2
Cuse v0.1.37 @ /dev/cuse
random: entropy device external interface
kbd1 at kbdmux0
efirtc0: <EFI Realtime Clock>
efirtc0: registered as a time-of-day clock, resolution 1.000000s
smbios0: <System Management BIOS> at iomem 0xf04c0-0xf04de
smbios0: Version: 2.7, BCD Revision: 2.7
aesni0: <AES-CBC,AES-CCM,AES-GCM,AES-ICM,AES-XTS>
acpi0: <ALASKA A M I>
acpi0: Power Button (fixed)
cpu0: <ACPI CPU> on acpi0
hpet0: <High Precision Event Timer> iomem 0xfed00000-0xfed003ff on acpi0
Timecounter "HPET" frequency 14318180 Hz quality 950
Event timer "HPET" frequency 14318180 Hz quality 550
Event timer "HPET1" frequency 14318180 Hz quality 440
Event timer "HPET2" frequency 14318180 Hz quality 440
Event timer "HPET3" frequency 14318180 Hz quality 440
Event timer "HPET4" frequency 14318180 Hz quality 440
atrtc0: <AT realtime clock> port 0x70-0x77 irq 8 on acpi0
atrtc0: Warning: Couldn't map I/O.
atrtc0: registered as a time-of-day clock, resolution 1.000000s
Event timer "RTC" frequency 32768 Hz quality 0
attimer0: <AT timer> port 0x40-0x43,0x50-0x53 irq 0 on acpi0
Timecounter "i8254" frequency 1193182 Hz quality 0
Event timer "i8254" frequency 1193182 Hz quality 100
Timecounter "ACPI-fast" frequency 3579545 Hz quality 900
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x408-0x40b on acpi0
acpi_ec0: <Embedded Controller: GPE 0x16> port 0x62,0x66 on acpi0
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
pci0: <ACPI PCI bus> on pcib0
vgapci0: <VGA-compatible display> port 0xf000-0xf03f mem 0xf7800000-0xf7bfffff,0xc0000000-0xdfffffff irq 16 at device 2.0 on pci0
vgapci0: Boot video device
xhci0: <Intel Panther Point USB 3.0 controller> mem 0xf7d00000-0xf7d0ffff irq 16 at device 20.0 on pci0
xhci0: 32 bytes context size, 64-bit DMA
xhci0: Port routing mask set to 0xffffffff
usbus0 on xhci0
usbus0: 5.0Gbps Super Speed USB v3.0
pci0: <simple comms> at device 22.0 (no driver attached)
ehci0: <Intel Panther Point USB 2.0 controller> mem 0xf7d18000-0xf7d183ff irq 16 at device 26.0 on pci0
usbus1: EHCI version 1.0
usbus1 on ehci0
usbus1: 480Mbps High Speed USB v2.0
hdac0: <Intel Panther Point HDA Controller> mem 0xf7d10000-0xf7d13fff irq 22 at device 27.0 on pci0
pcib1: <ACPI PCI-PCI bridge> irq 16 at device 28.0 on pci0
pci1: <ACPI PCI bus> on pcib1
re0: <RealTek 810xE PCIe 10/100baseTX> port 0xe000-0xe0ff mem 0xe0004000-0xe0004fff,0xe0000000-0xe0003fff irq 16 at device 0.0 on pci1
re0: Using 1 MSI-X message
re0: ASPM disabled
re0: Chip rev. 0x40800000
re0: MAC rev. 0x00400000
miibus0: <MII bus> on re0
rlphy0: <RTL8201E 10/100 media interface> PHY 1 on miibus0
rlphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto, auto-flow
re0: Using defaults for TSO: 65518/35/2048
re0: Ethernet address: 00:e0:4c:b6:c9:ac
re0: netmap queues/slots: TX 1/256, RX 1/256
pcib2: <ACPI PCI-PCI bridge> irq 17 at device 28.1 on pci0
pci2: <ACPI PCI bus> on pcib2
pci2: <network> at device 0.0 (no driver attached)
ehci1: <Intel Panther Point USB 2.0 controller> mem 0xf7d17000-0xf7d173ff irq 23 at device 29.0 on pci0
usbus2: EHCI version 1.0
usbus2 on ehci1
usbus2: 480Mbps High Speed USB v2.0
isab0: <PCI-ISA bridge> at device 31.0 on pci0
isa0: <ISA bus> on isab0
ahci0: <Intel Panther Point AHCI SATA controller> port 0xf0b0-0xf0b7,0xf0a0-0xf0a3,0xf090-0xf097,0xf080-0xf083,0xf060-0xf07f mem 0xf7d16000-0xf7d167ff irq 19 at device 31.2 on pci0
ahci0: AHCI v1.30 with 6 3Gbps ports, Port Multiplier not supported
ahcich2: <AHCI channel> at channel 2 on ahci0
ahcich4: <AHCI channel> at channel 4 on ahci0
ahciem0: <AHCI enclosure management bridge> on ahci0
acpi_button0: <Power Button> on acpi0
acpi_button1: <Sleep Button> on acpi0
acpi_tz0: <Thermal Zone> on acpi0
acpi_tz1: <Thermal Zone> on acpi0
atkbdc0: <Keyboard controller (i8042)> port 0x60,0x64 irq 1 on acpi0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
kbd0 at atkbd0
atkbd0: [GIANT-LOCKED]
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: [GIANT-LOCKED]
WARNING: Device "psm" is Giant locked and may be deleted before FreeBSD 14.0.
psm0: model IntelliMouse, device ID 3
battery0: <ACPI Control Method Battery> on acpi0
acpi_acad0: <AC Adapter> on acpi0
acpi_lid0: <Control Method Lid Switch> on acpi0
coretemp0: <CPU On-Die Thermal Sensors> on cpu0
est0: <Enhanced SpeedStep Frequency Control> on cpu0
module_register_init: MOD_LOAD (tmpfs, 0xffffffff80cd4380, 0xffffffff818f7080) error 17
Timecounter "TSC-low" frequency 1247167238 Hz quality 1000
Timecounters tick every 1.000 msec
hdacc0: <Realtek ALC662 rev1 HDA CODEC> at cad 0 on hdac0
hdaa0: <Realtek ALC662 rev1 Audio Function Group> at nid 1 on hdacc0
pcm0: <Realtek ALC662 rev1 (Analog)> at nid 27 and 25 on hdaa0
pcm1: <Realtek ALC662 rev1 (Left Analog Mic)> at nid 24 on hdaa0
hdacc1: <Intel Panther Point HDA CODEC> at cad 3 on hdac0
hdaa1: <Intel Panther Point Audio Function Group> at nid 1 on hdacc1
pcm2: <Intel Panther Point (HDMI/DP 8ch)> at nid 6 on hdaa1
sysctl_unregister_oid: failed(22) to unregister sysctl(tmpfs)
ugen2.1: <Intel EHCI root HUB> at usbus2
ugen0.1: <Intel XHCI root HUB> at usbus0
uhub0 on usbus2
uhub0: <Intel EHCI root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus2
ugen1.1: <Intel EHCI root HUB> at usbus1
uhub1 on usbus0
uhub1: <Intel XHCI root HUB, class 9/0, rev 3.00/1.00, addr 1> on usbus0
uhub2 on usbus1
uhub2: <Intel EHCI root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus1
Trying to mount root from ufs:/dev/da0p2 [rw]...
ses0 at ahciem0 bus 0 scbus2 target 0 lun 0
ses0: <AHCI SGPIO Enclosure 2.00 0001> SEMB S-E-S 2.00 device
ses0: SEMB SES Device
ada0 at ahcich2 bus 0 scbus0 target 0 lun 0
ada0: <BR 64GB R0427A0> ACS-2 ATA SATA 3.x device
ada0: Serial Number R0504A00000000000834
ada0: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 512bytes)
ada0: Command Queueing enabled
ada0: 57241MB (117231408 512 byte sectors)
ses0: ada0,pass0 in 'Slot 02', SATA Slot: scbus0 target 0
ses0: cd0,pass1 in 'Slot 04', SATA Slot: scbus1 target 0
cd0 at ahcich4 bus 0 scbus1 target 0 lun 0
cd0: <hp DVDRW  DA8AESH XH6M> Removable CD-ROM SCSI device
cd0: Serial Number 666748900531
cd0: 150.000MB/s transfers (SATA 1.x, UDMA6, ATAPI 12bytes, PIO 8192bytes)
cd0: Attempt to query device size failed: NOT READY, Medium not present - tray closed
uhub1: 8 ports with 8 removable, self powered
ugen0.2: <VIA Labs, Inc. USB2.0 Hub> at usbus0
uhub3 on uhub1
uhub3: <VIA Labs, Inc. USB2.0 Hub, class 9/0, rev 2.10/90.23, addr 1> on usbus0
uhub3: MTT enabled
uhub2: 2 ports with 2 removable, self powered
uhub0: 2 ports with 2 removable, self powered
Root mount waiting for: usbus0 usbus1 usbus2
ugen1.2: <vendor 0x8087 product 0x0024> at usbus1
uhub4 on uhub2
uhub4: <vendor 0x8087 product 0x0024, class 9/0, rev 2.00/0.00, addr 2> on usbus1
ugen2.2: <vendor 0x8087 product 0x0024> at usbus2
uhub5 on uhub0
uhub5: <vendor 0x8087 product 0x0024, class 9/0, rev 2.00/0.00, addr 2> on usbus2
Root mount waiting for: usbus0 usbus1 usbus2
uhub4: 6 ports with 6 removable, self powered
uhub3: 4 ports with 4 removable, self powered
uhub5: 8 ports with 8 removable, self powered
ugen1.3: <GenesysLogic Technology Co., Ltd. USB2.0 UVC PC Camera> at usbus1
Root mount waiting for: usbus0
ugen0.3: <vendor 0x4e53 USB OPTICAL MOUSE> at usbus0
ukbd0 on uhub3
ukbd0: <vendor 0x4e53 USB OPTICAL MOUSE, class 0/0, rev 1.10/1.00, addr 2> on usbus0
kbd2 at ukbd0
ugen0.4: <SIGMACHIP USB Keyboard> at usbus0
ukbd1 on uhub3
ukbd1: <SIGMACHIP USB Keyboard, class 0/0, rev 1.10/1.50, addr 3> on usbus0
kbd3 at ukbd1
Root mount waiting for: usbus0
ugen0.5: <vendor 0x0a12 CSR8510 A10> at usbus0
ugen0.6: <VIA Labs, Inc. USB3.0 Hub> at usbus0
uhub6 on uhub1
uhub6: <VIA Labs, Inc. USB3.0 Hub, class 9/0, rev 3.10/90.23, addr 5> on usbus0
Root mount waiting for: usbus0
Root mount waiting for: usbus0
uhub6: 4 ports with 4 removable, self powered
Root mount waiting for: usbus0
usb_msc_auto_quirk: UQ_MSC_NO_GETMAXLUN set for USB mass storage device VLI manufacture String VLI Product String (0x2109:0x0711)
ugen0.7: <VLI manufacture String VLI Product String> at usbus0
umass0 on uhub6
umass0: <VLI manufacture String VLI Product String, class 0/0, rev 3.00/1.44, addr 6> on usbus0
umass0:  SCSI over Bulk-Only; quirks = 0x0100
umass0:3:0: Attached to scbus3
(probe0:umass-sim0:0:0:0): REPORT LUNS. CDB: a0 00 00 00 00 00 00 00 00 10 00 00
(probe0:umass-sim0:0:0:0): CAM status: SCSI Status Error
(probe0:umass-sim0:0:0:0): SCSI status: Check Condition
(probe0:umass-sim0:0:0:0): SCSI sense: ILLEGAL REQUEST asc:20,0 (Invalid command operation code)
(probe0:umass-sim0:0:0:0): Error 22, Unretryable error
da0 at umass-sim0 bus 0 scbus3 target 0 lun 0
da0: <aigo SSD S500 512GB U080> Fixed Direct Access SPC-4 SCSI device
da0: Serial Number 000000123ACD
da0: 400.000MB/s transfers
da0: 488386MB (1000215212 512 byte sectors)
da0: quirks=0x2<NO_6_BYTE>
WARNING: / was not properly dismounted
WARNING: /: mount pending error: blocks 0 files 1
drmn0: <drmn> on vgapci0
vgapci0: child drmn0 requested pci_enable_io
vgapci0: child drmn0 requested pci_enable_io
[drm] Unable to create a private tmpfs mount, hugepage support will be disabled(-19).
[drm] Got stolen memory base 0x7fa00000, size 0x22000000
drmn0: [drm] *ERROR* Stolen reserved area 0xfffffe007da4b9b8R outside stolen memory 0xfffffe007da4b9a0R
sysctl_warn_reuse: can't re-use a leaf (hw.dri.debug)!
[drm] Initialized i915 1.6.0 20200917 for drmn0 on minor 0
VT: Replacing driver "efifb" with new "fb".
drmn0: [drm] *ERROR* uncleared fifo underrun on pipe A
drmn0: [drm] *ERROR* CPU pipe A FIFO underrun
start FB_INFO:
type=11 height=1080 width=1920 depth=32
pbase=0xc0001000 vbase=0xfffff800c0001000
name=drmn0 flags=0x0 stride=7680 bpp=32
end FB_INFO
ichsmb0: <Intel Panther Point SMBus controller> port 0xf040-0xf05f mem 0xf7d15000-0xf7d150ff irq 18 at device 31.3 on pci0
smbus0: <System Management Bus> on ichsmb0
rtwn0: <Realtek RTL8188EE> port 0xd000-0xd0ff mem 0xf7c00000-0xf7c03fff irq 17 at device 0.0 on pci2
rtwn0: MAC/BB RTL8188EE, RF 6052 1T1R
wlan0: Ethernet address: 00:e0:4c:91:ea:31
lo0: link state changed to UP
re0: link state changed to DOWN
re0: link state changed to UP
ums0 on uhub3
ums0: <vendor 0x4e53 USB OPTICAL MOUSE, class 0/0, rev 1.10/1.00, addr 2> on usbus0
ums0: 5 buttons and [XYZ] coordinates ID=1
uhid0 on uhub3
uhid0: <SIGMACHIP USB Keyboard, class 0/0, rev 1.10/1.50, addr 3> on usbus0
ubt0 on uhub1
ubt0: <vendor 0x0a12 CSR8510 A10, class 224/1, rev 2.00/88.91, addr 4> on usbus0
WARNING: attempt to domain_add(bluetooth) after domainfinalize()
WARNING: attempt to domain_add(netgraph) after domainfinalize()
Security policy loaded: MAC/ntpd (mac_ntpd)
dmseg | grep error
Code: 
module_register_init: MOD_LOAD (tmpfs, 0xffffffff80cd4380, 0xffffffff818f7080) error 17
(probe0:umass-sim0:0:0:0): Error 22, Unretryable error
WARNING: /: mount pending error: blocks 0 files 1
 
My screen occasionally goes blank / black for a few seconds at a time. It's a bit annoying but rare -- maybe once every few months. I only recall one time where it didn't come back. When it happens, there are no errors reported in /var/log/messages.
 
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