external monitor not detected

xrandr does not detect external monitor with ubuntu 18.
It stopped suddenly.
Ran bug report tool.
i look for atatching gz file

nvidia-bug-report.log.gz (1.05 MB)

Hi dgang,

May I know what’s your platform and BSP version?
Please provide more information then we can have suggestions.

Thanks

update: when i changed the screen manager from gdm3 to lightdm and used the latest nvidia driver it started to work.
But here are all details of my computer
~ uname -a
Linux david-Inspiron-15-7000-Gaming 4.18.0-13-generic #14-Ubuntu SMP Wed Dec 5 09:04:24 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

sudo lshw
david-inspiron-15-7000-gaming
description: Notebook
product: Inspiron 15 7000 Gaming (0798)
vendor: Dell Inc.
serial: 1NVKJ22
width: 64 bits
capabilities: smbios-3.0 dmi-3.0 smp vsyscall32
configuration: boot=normal chassis=docking family=Inspiron sku=0798 uuid=44454C4C-4E00-1056-804B-B1C04F4A3232
*-core
description: Motherboard
product: 065C71
vendor: Dell Inc.
physical id: 0
version: A00
serial: /1NVKJ22/CN1296674E0093/
*-firmware
description: BIOS
vendor: Dell Inc.
physical id: 0
version: 1.8.1
date: 08/15/2018
size: 64KiB
capacity: 15MiB
capabilities: pci pnp upgrade shadowing cdboot bootselect edd int13floppynec int13floppy1200 int13floppy720 int13floppy2880 int5printscreen int9keyboard int14serial int17printer acpi usb smartbattery biosbootspecification netboot uefi
*-memory
description: System Memory
physical id: 44
slot: System board or motherboard
size: 32GiB
*-bank:0
description: SODIMM DDR4 Synchronous 2400 MHz (0.4 ns)
product: HMA82GS6AFR8N-UH
vendor: SK Hynix
physical id: 0
serial: 41D8D406
slot: DIMM A
size: 16GiB
width: 64 bits
clock: 2400MHz (0.4ns)
*-bank:1
description: SODIMM DDR4 Synchronous 2667 MHz (0.4 ns)
product: 16ATF2G64HZ-2G6E1
vendor: Micron
physical id: 1
serial: 1E90A20B
slot: DIMM B
size: 16GiB
width: 64 bits
clock: 2667MHz (0.4ns)
*-cache:0
description: L1 cache
physical id: 48
slot: L1 Cache
size: 256KiB
capacity: 256KiB
capabilities: synchronous internal write-back unified
configuration: level=1
*-cache:1
description: L2 cache
physical id: 49
slot: L2 Cache
size: 1MiB
capacity: 1MiB
capabilities: synchronous internal write-back unified
configuration: level=2
*-cache:2
description: L3 cache
physical id: 4a
slot: L3 Cache
size: 6MiB
capacity: 6MiB
capabilities: synchronous internal write-back unified
configuration: level=3
*-cpu
description: CPU
product: Intel® Core™ i7-7700HQ CPU @ 2.80GHz
vendor: Intel Corp.
physical id: 4b
bus info: cpu@0
version: Intel® Core™ i7-7700HQ CPU @ 2.80GHz
serial: To Be Filled By O.E.M.
slot: U3E1
size: 3527MHz
capacity: 3800MHz
width: 64 bits
clock: 100MHz
capabilities: x86-64 fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf tsc_known_freq pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb invpcid_single pti ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid mpx rdseed adx smap clflushopt intel_pt xsaveopt xsavec xgetbv1 xsaves dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp flush_l1d cpufreq
configuration: cores=4 enabledcores=4 threads=8
*-pci
description: Host bridge
product: Xeon E3-1200 v6/7th Gen Core Processor Host Bridge/DRAM Registers
vendor: Intel Corporation
physical id: 100
bus info: pci@0000:00:00.0
version: 05
width: 32 bits
clock: 33MHz
*-pci:0
description: PCI bridge
product: Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor PCIe Controller (x16)
vendor: Intel Corporation
physical id: 1
bus info: pci@0000:00:01.0
version: 05
width: 32 bits
clock: 33MHz
capabilities: pci pm msi pciexpress normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:16 ioport:e000(size=4096) memory:de000000-df0fffff ioport:c0000000(size=301989888)
*-display
description: VGA compatible controller
product: GP107M [GeForce GTX 1050 Ti Mobile]
vendor: NVIDIA Corporation
physical id: 0
bus info: pci@0000:01:00.0
version: a1
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress vga_controller bus_master cap_list rom
configuration: driver=nvidia latency=0
resources: irq:129 memory:de000000-deffffff memory:c0000000-cfffffff memory:d0000000-d1ffffff ioport:e000(size=128) memory:df000000-df07ffff
*-display
description: VGA compatible controller
product: Intel Corporation
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 04
width: 64 bits
clock: 33MHz
capabilities: pciexpress msi pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:127 memory:dd000000-ddffffff memory:b0000000-bfffffff ioport:f000(size=64) memory:c0000-dffff
*-generic:0
description: Signal processing controller
product: Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem
vendor: Intel Corporation
physical id: 4
bus info: pci@0000:00:04.0
version: 05
width: 64 bits
clock: 33MHz
capabilities: msi pm cap_list
configuration: driver=proc_thermal latency=0
resources: irq:16 memory:df320000-df327fff
*-usb
description: USB controller
product: 100 Series/C230 Series Chipset Family USB 3.0 xHCI Controller
vendor: Intel Corporation
physical id: 14
bus info: pci@0000:00:14.0
version: 31
width: 64 bits
clock: 33MHz
capabilities: pm msi xhci bus_master cap_list
configuration: driver=xhci_hcd latency=0
resources: irq:122 memory:df310000-df31ffff
*-generic:1
description: Signal processing controller
product: 100 Series/C230 Series Chipset Family Thermal Subsystem
vendor: Intel Corporation
physical id: 14.2
bus info: pci@0000:00:14.2
version: 31
width: 64 bits
clock: 33MHz
capabilities: pm msi cap_list
configuration: driver=intel_pch_thermal latency=0
resources: irq:18 memory:df338000-df338fff
*-generic:2
description: Signal processing controller
product: 100 Series/C230 Series Chipset Family Serial IO I2C Controller #0
vendor: Intel Corporation
physical id: 15
bus info: pci@0000:00:15.0
version: 31
width: 64 bits
clock: 33MHz
capabilities: pm bus_master cap_list
configuration: driver=intel-lpss latency=0
resources: irq:16 memory:df337000-df337fff
*-generic:3
description: Signal processing controller
product: 100 Series/C230 Series Chipset Family Serial IO I2C Controller #1
vendor: Intel Corporation
physical id: 15.1
bus info: pci@0000:00:15.1
version: 31
width: 64 bits
clock: 33MHz
capabilities: pm bus_master cap_list
configuration: driver=intel-lpss latency=0
resources: irq:17 memory:df336000-df336fff
*-communication
description: Communication controller
product: 100 Series/C230 Series Chipset Family MEI Controller #1
vendor: Intel Corporation
physical id: 16
bus info: pci@0000:00:16.0
version: 31
width: 64 bits
clock: 33MHz
capabilities: pm msi bus_master cap_list
configuration: driver=mei_me latency=0
resources: irq:125 memory:df335000-df335fff
*-storage
description: RAID bus controller
product: 82801 Mobile SATA Controller [RAID mode]
vendor: Intel Corporation
physical id: 17
bus info: pci@0000:00:17.0
version: 31
width: 32 bits
clock: 66MHz
capabilities: storage msi pm bus_master cap_list
configuration: driver=ahci latency=0
resources: irq:123 memory:df330000-df331fff memory:df334000-df3340ff ioport:f090(size=8) ioport:f080(size=4) ioport:f060(size=32) memory:df333000-df3337ff
*-pci:1
description: PCI bridge
product: 100 Series/C230 Series Chipset Family PCI Express Root Port #5
vendor: Intel Corporation
physical id: 1c
bus info: pci@0000:00:1c.0
version: f1
width: 32 bits
clock: 33MHz
capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:16 ioport:d000(size=4096) memory:df200000-df2fffff
*-network
description: Ethernet interface
product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:02:00.0
logical name: enp2s0
version: 15
serial: 64:00:6a:fb:de:ff
size: 10Mbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl8168h-2_0.0.2 02/26/15 latency=0 link=no multicast=yes port=MII speed=10Mbit/s
resources: irq:16 ioport:d000(size=256) memory:df204000-df204fff memory:df200000-df203fff
*-pci:2
description: PCI bridge
product: 100 Series/C230 Series Chipset Family PCI Express Root Port #6
vendor: Intel Corporation
physical id: 1c.5
bus info: pci@0000:00:1c.5
version: f1
width: 32 bits
clock: 33MHz
capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:17 memory:df100000-df1fffff
*-network
description: Wireless interface
product: Wireless 3165
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:03:00.0
logical name: wlp3s0
version: 79
serial: 3c:f8:62:d6:54:16
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=4.18.0-13-generic firmware=29.1044073957.0 ip=192.168.10.77 latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: irq:126 memory:df100000-df101fff
*-isa
description: ISA bridge
product: HM175 Chipset LPC/eSPI Controller
vendor: Intel Corporation
physical id: 1f
bus info: pci@0000:00:1f.0
version: 31
width: 32 bits
clock: 33MHz
capabilities: isa bus_master
configuration: latency=0
*-memory UNCLAIMED
description: Memory controller
product: 100 Series/C230 Series Chipset Family Power Management Controller
vendor: Intel Corporation
physical id: 1f.2
bus info: pci@0000:00:1f.2
version: 31
width: 32 bits
clock: 33MHz (30.3ns)
configuration: latency=0
resources: memory:df32c000-df32ffff
*-multimedia
description: Audio device
product: CM238 HD Audio Controller
vendor: Intel Corporation
physical id: 1f.3
bus info: pci@0000:00:1f.3
version: 31
width: 64 bits
clock: 33MHz
capabilities: pm msi bus_master cap_list
configuration: driver=snd_hda_intel latency=32
resources: irq:128 memory:df328000-df32bfff memory:df300000-df30ffff
*-serial
description: SMBus
product: 100 Series/C230 Series Chipset Family SMBus
vendor: Intel Corporation
physical id: 1f.4
bus info: pci@0000:00:1f.4
version: 31
width: 64 bits
clock: 33MHz
configuration: driver=i801_smbus latency=0
resources: irq:16 memory:df332000-df3320ff ioport:f040(size=32)
*-scsi:0
physical id: 1
logical name: scsi0
capabilities: emulated
*-disk
description: ATA Disk
product: SanDisk X400 M.2
physical id: 0.0.0
bus info: scsi@0:0.0.0
logical name: /dev/sda
version: 0012
serial: 170384802397
size: 119GiB (128GB)
capabilities: gpt-1.00 partitioned partitioned:gpt
configuration: ansiversion=5 guid=eeff63e3-8a03-4f50-98a3-d32de96e0a83 logicalsectorsize=512 sectorsize=512
*-volume:0
description: Windows FAT volume
vendor: MSDOS5.0
physical id: 1
bus info: scsi@0:0.0.0,1
logical name: /dev/sda1
logical name: /boot/efi
version: FAT32
serial: 14f4-0afc
size: 495MiB
capacity: 499MiB
capabilities: boot precious readonly hidden nomount fat initialized
configuration: FATs=2 filesystem=fat label=ESP mount.fstype=vfat mount.options=rw,relatime,fmask=0077,dmask=0077,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro name=EFI system partition state=mounted
*-volume:1
description: reserved partition
vendor: Windows
physical id: 2
bus info: scsi@0:0.0.0,2
logical name: /dev/sda2
serial: 3f41f4ca-82b2-4c66-af99-093acd90942f
capacity: 127MiB
capabilities: nofs precious readonly hidden nomount
configuration: name=Microsoft reserved partition
*-volume:2
description: Windows NTFS volume
vendor: Windows
physical id: 3
bus info: scsi@0:0.0.0,3
logical name: /dev/sda3
version: 3.1
serial: d0977966-048e-0b4b-a66d-398b8234417b
size: 107GiB
capacity: 107GiB
capabilities: ntfs initialized
configuration: clustersize=4096 created=2017-04-14 14:12:57 filesystem=ntfs label=OS name=Basic data partition state=clean
*-volume:3
description: Windows NTFS volume
vendor: Windows
physical id: 4
bus info: scsi@0:0.0.0,4
logical name: /dev/sda4
version: 3.1
serial: 8a45-776c
size: 439MiB
capacity: 449MiB
capabilities: boot precious readonly hidden nomount ntfs initialized
configuration: clustersize=4096 created=2017-04-14 15:18:48 filesystem=ntfs label=WINRETOOLS modified_by_chkdsk=true mounted_on_nt4=true resize_log_file=true state=dirty upgrade_on_mount=true
*-volume:4
description: Windows NTFS volume
vendor: Windows
physical id: 5
bus info: scsi@0:0.0.0,5
logical name: /dev/sda5
version: 3.1
serial: 2646-6c35
size: 10GiB
capacity: 10GiB
capabilities: boot precious readonly hidden nomount ntfs initialized
configuration: clustersize=4096 created=2017-04-14 15:18:49 filesystem=ntfs label=Image modified_by_chkdsk=true mounted_on_nt4=true resize_log_file=true state=dirty upgrade_on_mount=true
*-scsi:1
physical id: 2
logical name: scsi1
capabilities: emulated
*-disk
description: ATA Disk
product: ST1000LM035-1RK1
vendor: Seagate
physical id: 0.0.0
bus info: scsi@1:0.0.0
logical name: /dev/sdb
version: SDM1
serial: WDE6JSNH
size: 931GiB (1TB)
capabilities: gpt-1.00 partitioned partitioned:gpt
configuration: ansiversion=5 guid=7b11cf7e-0f52-4767-bea9-cb631b32fbdf logicalsectorsize=512 sectorsize=4096
*-volume:0
description: reserved partition
vendor: Windows
physical id: 1
bus info: scsi@1:0.0.0,1
logical name: /dev/sdb1
serial: b0cc7db6-7152-4865-a3a8-e05d781c3086
capacity: 127MiB
capabilities: nofs
configuration: name=Microsoft reserved partition
*-volume:1
description: Windows NTFS volume
vendor: Windows
physical id: 2
bus info: scsi@1:0.0.0,2
logical name: /dev/sdb2
version: 3.1
serial: ec716125-2020-5541-ab78-94b3b320184a
size: 468GiB
capacity: 468GiB
capabilities: ntfs initialized
configuration: clustersize=4096 created=2017-04-14 14:13:10 filesystem=ntfs label=DATA modified_by_chkdsk=true mounted_on_nt4=true name=Basic data partition resize_log_file=true state=dirty upgrade_on_mount=true
*-volume:2
description: Windows FAT volume
vendor: mkfs.fat
physical id: 3
bus info: scsi@1:0.0.0,3
logical name: /dev/sdb3
version: FAT32
serial: e7a7-5b74
size: 503MiB
capacity: 512MiB
capabilities: boot fat initialized
configuration: FATs=2 filesystem=fat name=EFI System Partition
*-volume:3
description: EXT4 volume
vendor: Linux
physical id: 4
bus info: scsi@1:0.0.0,4
logical name: /dev/sdb4
logical name: /
version: 1.0
serial: 4e639705-76b7-4855-8c00-7536ecc45a71
size: 447GiB
capabilities: journaled extended_attributes large_files huge_files dir_nlink recover extents ext4 ext2 initialized
configuration: created=2017-09-17 16:54:02 filesystem=ext4 lastmountpoint=/ modified=2018-12-24 17:55:49 mount.fstype=ext4 mount.options=rw,relatime,errors=remount-ro mounted=2018-12-24 17:55:56 state=mounted
*-volume:4
description: Linux swap volume
vendor: Linux
physical id: 5
bus info: scsi@1:0.0.0,5
logical name: /dev/sdb5
version: 1
serial: 851470dd-a6fb-430e-b3f5-ed2052d755a2
size: 15GiB
capacity: 15GiB
capabilities: nofs swap initialized
configuration: filesystem=swap pagesize=4095
*-battery
product: DELL 71JF452
vendor: SMP
physical id: 1
version: 02/28/2017
serial: 08C2
slot: Sys. Battery Bay
capacity: 73990mWh
configuration: voltage=11.4V
*-network:0
description: Ethernet interface
physical id: 2
logical name: docker0
serial: 02:42:b6:73:93:c5
capabilities: ethernet physical
configuration: broadcast=yes driver=bridge driverversion=2.3 firmware=N/A ip=172.17.0.1 link=no multicast=yes
*-network:1
description: Ethernet interface
physical id: 3
logical name: br-c91515d488be
serial: 02:42:cc:20:20:a6
capabilities: ethernet physical
configuration: broadcast=yes driver=bridge driverversion=2.3 firmware=N/A ip=172.18.0.1 link=no multicast=yes