I had same problem in Ubuntu 16.04.3. But not frequent. It was happening when I play HD video. But now after installing Ubuntu 18.04 the same problem even when browsing. Its too frequent.
I have tried to reinstall Intel-microcode, bumblebee, xorg video drivers. No improvement.
The system don't crash even show error message in dmesg and journalctl.
aravind@comp:~$ lspci
00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v6/7th Gen Core Processor Host Bridge/DRAM Registers (rev 02)
00:02.0 VGA compatible controller: Intel Corporation HD Graphics 620 (rev 02)
00:14.0 USB controller: Intel Corporation Sunrise Point-LP USB 3.0 xHCI Controller (rev 21)
00:14.2 Signal processing controller: Intel Corporation Sunrise Point-LP Thermal subsystem (rev 21)
00:15.0 Signal processing controller: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #0 (rev 21)
00:16.0 Communication controller: Intel Corporation Sunrise Point-LP CSME HECI #1 (rev 21)
00:17.0 SATA controller: Intel Corporation Sunrise Point-LP SATA Controller [AHCI mode] (rev 21)
00:1c.0 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port (rev f1)
00:1d.0 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #9 (rev f1)
00:1d.2 PCI bridge: Intel Corporation Device 9d1a (rev f1)
00:1d.3 PCI bridge: Intel Corporation Device 9d1b (rev f1)
00:1f.0 ISA bridge: Intel Corporation Sunrise Point-LP LPC Controller (rev 21)
00:1f.2 Memory controller: Intel Corporation Sunrise Point-LP PMC (rev 21)
00:1f.3 Audio device: Intel Corporation Sunrise Point-LP HD Audio (rev 21)
00:1f.4 SMBus: Intel Corporation Sunrise Point-LP SMBus (rev 21)
01:00.0 3D controller: NVIDIA Corporation Device 179c (rev ff)
03:00.0 Network controller: Qualcomm Atheros QCA9377 802.11ac Wireless Network Adapter (rev 31)
04:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTL8411B PCI Express Card Reader (rev 01)
04:00.1 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 12)
aravind@comp:~$ sudo lshw
[sudo] password for aravind:
comp
description: Notebook
product: Aspire E5-575G (Aspire E5-575G_115F_1.25)
vendor: Acer
version: V1.25
serial: NXGDWSI034717145457600
width: 64 bits
capabilities: smbios-3.0 dmi-3.0 smp vsyscall32
configuration: chassis=notebook family=KBL sku=Aspire E5-575G_115F_1.25 uuid=BB9943DA-A143-49C0-8D00-A81E84883CFD
*-core
description: Motherboard
product: Ironman_SK
vendor: Acer
physical id: 0
version: V1.25
serial: NBGD411006717145457600
slot: Type2 - Board Chassis Location
*-firmware
description: BIOS
vendor: Insyde Corp.
physical id: 0
version: V1.25
date: 03/03/2017
size: 128KiB
capacity: 4544KiB
capabilities: pci upgrade shadowing cdboot bootselect edd int13floppynec int13floppytoshiba int13floppy360 int13floppy1200 int13floppy720 int13floppy2880 int9keyboard int10video acpi usb biosbootspecification uefi
*-cpu
description: CPU
product: Intel(R) Core(TM) i5-7200U CPU @ 2.50GHz
vendor: Intel Corp.
physical id: 4
bus info: cpu@0
version: Intel(R) Core(TM) i5-7200U CPU @ 2.50GHz
serial: To Be Filled By O.E.M.
slot: U3E1
size: 799MHz
capacity: 4005MHz
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=2 enabledcores=2 threads=4
*-cache:0
description: L1 cache
physical id: 5
slot: L1 Cache
size: 128KiB
capacity: 128KiB
capabilities: synchronous internal write-back unified
configuration: level=1
*-cache:1
description: L2 cache
physical id: 6
slot: L2 Cache
size: 512KiB
capacity: 512KiB
capabilities: synchronous internal write-back unified
configuration: level=2
*-cache:2
description: L3 cache
physical id: 7
slot: L3 Cache
size: 3MiB
capacity: 3MiB
capabilities: synchronous internal write-back unified
configuration: level=3
*-memory
description: System Memory
physical id: d
slot: System board or motherboard
size: 8GiB
*-bank:0
description: SODIMM DDR4 Synchronous 2133 MHz (0.5 ns)
product: AO1P21FC4R1-B2MS
vendor: Fujitsu
physical id: 0
serial: 7F0E0200
slot: ChannelA-DIMM0
size: 4GiB
width: 64 bits
clock: 2133MHz (0.5ns)
*-bank:1
description: [empty]
physical id: 1
slot: ChannelA-DIMM1
*-bank:2
description: SODIMM DDR4 Synchronous 2133 MHz (0.5 ns)
product: V01D4S84GB5285282133
vendor: 0000
physical id: 2
serial: 00000000
slot: ChannelB-DIMM0
size: 4GiB
width: 64 bits
clock: 2133MHz (0.5ns)
*-bank:3
description: [empty]
physical id: 3
slot: ChannelB-DIMM1
*-pci
description: Host bridge
product: Intel Corporation
vendor: Intel Corporation
physical id: 100
bus info: pci@0000:00:00.0
version: 02
width: 32 bits
clock: 33MHz
*-display
description: VGA compatible controller
product: Intel Corporation
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 02
width: 64 bits
clock: 33MHz
capabilities: pciexpress msi pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:130 memory:b2000000-b2ffffff memory:c0000000-cfffffff ioport:5000(size=64) memory:c0000-dffff
*-usb
description: USB controller
product: Sunrise Point-LP USB 3.0 xHCI Controller
vendor: Intel Corporation
physical id: 14
bus info: pci@0000:00:14.0
version: 21
width: 64 bits
clock: 33MHz
capabilities: pm msi xhci bus_master cap_list
configuration: driver=xhci_hcd latency=0
resources: irq:126 memory:b4500000-b450ffff
*-usbhost:0
product: xHCI Host Controller
vendor: Linux 4.15.0-34-generic xhci-hcd
physical id: 0
bus info: usb@1
logical name: usb1
version: 4.15
capabilities: usb-2.00
configuration: driver=hub slots=12 speed=480Mbit/s
*-usb:0
description: Mouse
product: USB Optical Mouse
vendor: PixArt
physical id: 1
bus info: usb@1:1
version: 1.00
capabilities: usb-2.00
configuration: driver=usbhid maxpower=100mA speed=2Mbit/s
*-usb:1
description: Bluetooth wireless interface
vendor: Lite-On Technology Corp.
physical id: 5
bus info: usb@1:5
version: 0.01
capabilities: bluetooth usb-2.01
configuration: driver=btusb maxpower=100mA speed=12Mbit/s
*-usb:2
description: Video
product: HD WebCam
vendor: Generic
physical id: 7
bus info: usb@1:7
version: 0.07
serial: 200901010001
capabilities: usb-2.00
configuration: driver=uvcvideo maxpower=500mA speed=480Mbit/s
*-usbhost:1
product: xHCI Host Controller
vendor: Linux 4.15.0-34-generic xhci-hcd
physical id: 1
bus info: usb@2
logical name: usb2
version: 4.15
capabilities: usb-3.00
configuration: driver=hub slots=6 speed=5000Mbit/s
*-generic:0
description: Signal processing controller
product: Sunrise Point-LP Thermal subsystem
vendor: Intel Corporation
physical id: 14.2
bus info: pci@0000:00:14.2
version: 21
width: 64 bits
clock: 33MHz
capabilities: pm msi bus_master cap_list
configuration: driver=intel_pch_thermal latency=0
resources: irq:18 memory:b452a000-b452afff
*-generic:1
description: Signal processing controller
product: Sunrise Point-LP Serial IO I2C Controller #0
vendor: Intel Corporation
physical id: 15
bus info: pci@0000:00:15.0
version: 21
width: 64 bits
clock: 33MHz
capabilities: pm bus_master cap_list
configuration: driver=intel-lpss latency=0
resources: irq:16 memory:b452b000-b452bfff
*-communication
description: Communication controller
product: Sunrise Point-LP CSME HECI #1
vendor: Intel Corporation
physical id: 16
bus info: pci@0000:00:16.0
version: 21
width: 64 bits
clock: 33MHz
capabilities: pm msi bus_master cap_list
configuration: driver=mei_me latency=0
resources: irq:131 memory:b452c000-b452cfff
*-storage
description: SATA controller
product: Sunrise Point-LP SATA Controller [AHCI mode]
vendor: Intel Corporation
physical id: 17
bus info: pci@0000:00:17.0
version: 21
width: 32 bits
clock: 66MHz
capabilities: storage msi pm ahci_1.0 bus_master cap_list
configuration: driver=ahci latency=0
resources: irq:127 memory:b4528000-b4529fff memory:b452f000-b452f0ff ioport:5080(size=8) ioport:5088(size=4) ioport:5060(size=32) memory:b452d000-b452d7ff
*-pci:0
description: PCI bridge
product: Intel Corporation
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:122 ioport:4000(size=4096) memory:b3000000-b40fffff ioport:a0000000(size=301989888)
*-generic UNCLAIMED
description: Unassigned class
product: Illegal Vendor ID
vendor: Illegal Vendor ID
physical id: 0
bus info: pci@0000:01:00.0
version: ff
width: 32 bits
clock: 66MHz
capabilities: bus_master vga_palette cap_list
configuration: latency=255 maxlatency=255 mingnt=255
resources: memory:b3000000-b3ffffff memory:a0000000-afffffff memory:b0000000-b1ffffff ioport:4000(size=128) memory:b4000000-b407ffff
*-pci:1
description: PCI bridge
product: Sunrise Point-LP PCI Express Root Port #9
vendor: Intel Corporation
physical id: 1d
bus info: pci@0000:00:1d.0
version: f1
width: 32 bits
clock: 33MHz
capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:123 ioport:6000(size=4096) memory:90100000-902fffff ioport:90300000(size=2097152)
*-pci:2
description: PCI bridge
product: Intel Corporation
vendor: Intel Corporation
physical id: 1d.2
bus info: pci@0000:00:1d.2
version: f1
width: 32 bits
clock: 33MHz
capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:124 memory:b4200000-b43fffff
*-network
description: Wireless interface
product: QCA9377 802.11ac Wireless Network Adapter
vendor: Qualcomm Atheros
physical id: 0
bus info: pci@0000:03:00.0
logical name: wlp3s0
version: 31
serial: 3c:a0:67:c1:05:d9
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=ath10k_pci driverversion=4.15.0-34-generic firmware=WLAN.TF.1.0-00002-QCATFSWPZ-5 ip=192.168.0.105 latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: irq:132 memory:b4200000-b43fffff
*-pci:3
description: PCI bridge
product: Intel Corporation
vendor: Intel Corporation
physical id: 1d.3
bus info: pci@0000:00:1d.3
version: f1
width: 32 bits
clock: 33MHz
capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:125 ioport:3000(size=4096) memory:b4400000-b44fffff
*-generic
description: Unassigned class
product: RTL8411B PCI Express Card Reader
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:04:00.0
version: 01
width: 32 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list rom
configuration: driver=rtsx_pci latency=0
resources: irq:129 memory:b4405000-b4405fff memory:b4410000-b441ffff
*-network
description: Ethernet interface
product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0.1
bus info: pci@0000:04:00.1
logical name: enp4s0f1
version: 12
serial: a8:1e:84:88:3c:fd
size: 10Mbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd 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=rtl8411-2_0.0.1 07/08/13 latency=0 link=no multicast=yes port=MII speed=10Mbit/s
resources: irq:19 ioport:3000(size=256) memory:b4404000-b4404fff memory:b4400000-b4403fff
*-isa
description: ISA bridge
product: Intel Corporation
vendor: Intel Corporation
physical id: 1f
bus info: pci@0000:00:1f.0
version: 21
width: 32 bits
clock: 33MHz
capabilities: isa bus_master
configuration: latency=0
*-memory UNCLAIMED
description: Memory controller
product: Sunrise Point-LP PMC
vendor: Intel Corporation
physical id: 1f.2
bus info: pci@0000:00:1f.2
version: 21
width: 32 bits
clock: 33MHz (30.3ns)
capabilities: bus_master
configuration: latency=0
resources: memory:b4524000-b4527fff
*-multimedia
description: Audio device
product: Intel Corporation
vendor: Intel Corporation
physical id: 1f.3
bus info: pci@0000:00:1f.3
version: 21
width: 64 bits
clock: 33MHz
capabilities: pm msi bus_master cap_list
configuration: driver=snd_hda_intel latency=32
resources: irq:133 memory:b4520000-b4523fff memory:b4510000-b451ffff
*-serial UNCLAIMED
description: SMBus
product: Sunrise Point-LP SMBus
vendor: Intel Corporation
physical id: 1f.4
bus info: pci@0000:00:1f.4
version: 21
width: 64 bits
clock: 33MHz
configuration: latency=0
resources: memory:b452e000-b452e0ff ioport:5040(size=32)
*-scsi:0
physical id: 1
logical name: scsi0
capabilities: emulated
*-disk
description: ATA Disk
product: ST1000LM035-1RK1
vendor: Seagate
physical id: 0.0.0
bus info: scsi@0:0.0.0
logical name: /dev/sda
version: ACM1
serial: WDE2XTM0
size: 931GiB (1TB)
capabilities: gpt-1.00 partitioned partitioned:gpt
configuration: ansiversion=5 guid=6376fc0c-9935-4ecd-ad18-259def4aed3a logicalsectorsize=512 sectorsize=4096
*-volume:0
description: BIOS Boot partition
vendor: EFI
physical id: 1
bus info: scsi@0:0.0.0,1
logical name: /dev/sda1
serial: c64347eb-fa4e-4326-b09f-dc1f8b5a96e6
capacity: 9764MiB
capabilities: nofs
*-volume:1
description: Linux swap volume
vendor: Linux
physical id: 2
bus info: scsi@0:0.0.0,2
logical name: /dev/sda2
version: 1
serial: af233857-e919-4cbf-ab84-f09b9f7d6635
size: 9763MiB
capacity: 9765MiB
capabilities: nofs swap initialized
configuration: filesystem=swap pagesize=4095
*-volume:2
description: EXT4 volume
vendor: Linux
physical id: 3
bus info: scsi@0:0.0.0,3
logical name: /dev/sda3
logical name: /
version: 1.0
serial: 24c65739-051c-489c-8021-ceba239a1286
size: 66GiB
capabilities: journaled extended_attributes large_files huge_files dir_nlink recover extents ext4 ext2 initialized
configuration: created=2018-04-01 06:18:41 filesystem=ext4 lastmountpoint=/ modified=2018-09-30 18:05:05 mount.fstype=ext4 mount.options=rw,relatime,errors=remount-ro,data=ordered mounted=2018-09-30 18:05:11 state=mounted
*-volume:3
description: EXT4 volume
vendor: Linux
physical id: 4
bus info: scsi@0:0.0.0,4
logical name: /dev/sda4
logical name: /home
version: 1.0
serial: 06b04e10-0ca8-48e5-a65d-18d8f54f39f8
size: 846GiB
capabilities: journaled extended_attributes large_files huge_files dir_nlink recover extents ext4 ext2 initialized
configuration: created=2017-08-04 19:22:46 filesystem=ext4 lastmountpoint=/home modified=2018-09-30 18:05:44 mount.fstype=ext4 mount.options=rw,relatime,data=ordered mounted=2018-09-30 18:05:44 state=mounted
*-scsi:1
physical id: 2
logical name: scsi1
capabilities: emulated
*-cdrom
description: DVD-RAM writer
product: DVD A DA8AESH
vendor: Slimtype
physical id: 0.0.0
bus info: scsi@1:0.0.0
logical name: /dev/cdrom
logical name: /dev/cdrw
logical name: /dev/dvd
logical name: /dev/dvdrw
logical name: /dev/sr0
version: XA11
capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ram
configuration: ansiversion=5 status=nodisc
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: xorg 1:7.7+19ubuntu7.1
ProcVersionSignature: Ubuntu 4.15.0-34.37-generic 4.15.18
Uname: Linux 4.15.0-34-generic x86_64
.tmp.unity_support_test.0:
ApportVersion: 2.20.9-0ubuntu7.4
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
Date: Sun Sep 30 22:53:16 2018
DistUpgraded: 2018-08-15 04:15:00,798 ERROR got error from PostInstallScript ./xorg_fix_proprietary.py (g-exec-error-quark: Failed to execute child process "./xorg_fix_proprietary.py" (No such file or directory) (8))
DistroCodename: bionic
DistroVariant: ubuntu
DkmsStatus:
bbswitch, 0.8, 4.15.0-33-generic, x86_64: installed
bbswitch, 0.8, 4.15.0-34-generic, x86_64: installed
virtualbox, 5.2.10, 4.15.0-33-generic, x86_64: installed
virtualbox, 5.2.10, 4.15.0-34-generic, x86_64: installed
GraphicsCard:
Intel Corporation HD Graphics 620 [8086:5916] (rev 02) (prog-if 00 [VGA controller])
Subsystem: Acer Incorporated [ALI] HD Graphics 620 [1025:1094]
InstallationDate: Installed on 2018-04-01 (182 days ago)
InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
Lsusb:
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 0408:a030 Quanta Computer, Inc.
Bus 001 Device 003: ID 04ca:3015 Lite-On Technology Corp.
Bus 001 Device 002: ID 0461:4d0f Primax Electronics, Ltd HP Optical Mouse
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Acer Aspire E5-575G
ProcEnviron:
LANGUAGE=en_IN:en
PATH=(custom, no user)
LANG=en_IN
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-34-generic root=UUID=24c65739-051c-489c-8021-ceba239a1286 ro quiet splash pcie_port_pm=off noresume vt.handoff=1
SourcePackage: xorg
UpgradeStatus: Upgraded to bionic on 2018-08-14 (46 days ago)
dmi.bios.date: 03/03/2017
dmi.bios.vendor: Insyde Corp.
dmi.bios.version: V1.25
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: Ironman_SK
dmi.board.vendor: Acer
dmi.board.version: V1.25
dmi.chassis.type: 10
dmi.chassis.vendor: Chassis Manufacturer
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnInsydeCorp.:bvrV1.25:bd03/03/2017:svnAcer:pnAspireE5-575G:pvrV1.25:rvnAcer:rnIronman_SK:rvrV1.25:cvnChassisManufacturer:ct10:cvrChassisVersion:
dmi.product.family: KBL
dmi.product.name: Aspire E5-575G
dmi.product.version: V1.25
dmi.sys.vendor: Acer
version.compiz: compiz 1:0.9.13.1+18.04.20180302-0ubuntu1
version.libdrm2: libdrm2 2.4.91-2
version.libgl1-mesa-dri: libgl1-mesa-dri 18.0.5-0ubuntu0~18.04.1
version.libgl1-mesa-glx: libgl1-mesa-glx 18.0.5-0ubuntu0~18.04.1
version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.5-1ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.0.1-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20171229-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2
xserver.bootTime: Tue Aug 14 21:31:54 2018
xserver.configfile: default
xserver.errors:
xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.19.6-1ubuntu4~16.04.1
xserver.video_driver: modeset
Thank you for taking the time to report this bug and helping to make Ubuntu better. It sounds like some part of the system has crashed. To help us find the cause of the crash please follow these steps:
1. Look in /var/crash for crash files and if found run:
ubuntu-bug YOURFILE.crash
Then tell us the ID of the newly-created bug.
2. If step 1 failed then look at https:/
3. If step 2 also failed then apply the workaround from bug 994921, reboot, reproduce the crash, and retry step 1.
Please take care to avoid attaching .crash files to bugs as we are unable to process them as file attachments. It would also be a security risk for yourself.