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Thread: Ubuntu 21.04 and 20.04 randomly reboots on my PC

  1. #1
    Join Date
    May 2022
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    5

    Ubuntu 21.04 and 20.04 randomly reboots on my PC

    My PC with installed Ubuntu 20.04 keeps rebooting.
    Before 20.04 LTS I had Ubuntu 21.04, which had the same issue, which is why I decided to install previous version.
    I tried to ground it in the office. It didn't help. One day, I even took it home from the office, I connected it at home with another power cable. It still rebooted several times. So, probably, it is not static electricity causing reboots.
    I tried to run it without video card. It kept rebooting.
    I inserted RAMs into different sockets. It kept rebooting.
    I plugged my PC into UPS. The same.
    I brought it to the service. They tested my PC for two days. They experienced same problem. Their checked hardware, said that it was ok. Installed windows on the same SSD, and there was no reboots with it. Then they somehow upgraded my Ubuntu. I am not sure what they did. But after that, they say, they did not experienced rebooting. However, when I brought it to the office it rebooted again.
    I have 32 Gb of RAM, I had 2 Gb of swap which I increased an hour ago to 16 Gb, but it didn't solve problem with reboots. I have a NVIDIA P106-100 graphic card with 6Gb memory.
    Time between reboots is random it can be 2 minutes or 12 hours. I am newbie in Linux, so, please, tell me what commands I should execute to provide you with needed information. Thanks for your help and time!

    lshw -sanitize prints:

    Code:
    Computer
        description: Desktop Computer
        product: System Product Name (SKU)
        vendor: System manufacturer
        version: System Version
        serial: [REMOVED]
        width: 64 bits
        capabilities: smbios-3.1.1 dmi-3.1.1 smp vsyscall32
        configuration: boot=normal chassis=desktop family=To be filled by O.E.M. sku=SKU uuid=[REMOVED]
      *-core
           description: Motherboard
           product: PRIME B365M-K
           vendor: ASUSTeK COMPUTER INC.
           physical id: 0
           version: Rev X.0x
           serial: [REMOVED]
           slot: Default string
         *-firmware
              description: BIOS
              vendor: American Megatrends Inc.
              physical id: 0
              version: 1202
              date: 08/01/2019
              size: 64KiB
              capacity: 16MiB
              capabilities: pci apm upgrade shadowing cdboot bootselect socketedrom edd int13floppy1200 int13floppy720 int13floppy2880 int5printscreen int9keyboard int14serial int17printer acpi usb biosbootspecification uefi
         *-memory
              description: System Memory
              physical id: 3c
              slot: System board or motherboard
              size: 32GiB
            *-bank:0
                 description: DIMM DDR4 Synchronous Unbuffered (Unregistered) 2400 MHz (0.4 ns)
                 product: TEAMGROUP-UD4-2400
                 vendor: Team Group Inc.
                 physical id: 0
                 serial: [REMOVED]
                 slot: ChannelA-DIMM1
                 size: 16GiB
                 width: 64 bits
                 clock: 2400MHz (0.4ns)
            *-bank:1
                 description: DIMM DDR4 Synchronous Unbuffered (Unregistered) 2400 MHz (0.4 ns)
                 product: TEAMGROUP-UD4-2400
                 vendor: Team Group Inc.
                 physical id: 1
                 serial: [REMOVED]
                 slot: ChannelB-DIMM1
                 size: 16GiB
                 width: 64 bits
                 clock: 2400MHz (0.4ns)
         *-cache:0
              description: L1 cache
              physical id: 40
              slot: L1 Cache
              size: 512KiB
              capacity: 512KiB
              capabilities: synchronous internal write-back unified
              configuration: level=1
         *-cache:1
              description: L2 cache
              physical id: 41
              slot: L2 Cache
              size: 2MiB
              capacity: 2MiB
              capabilities: synchronous internal write-back unified
              configuration: level=2
         *-cache:2
              description: L3 cache
              physical id: 42
              slot: L3 Cache
              size: 12MiB
              capacity: 12MiB
              capabilities: synchronous internal write-back unified
              configuration: level=3
         *-cpu
              description: CPU
              product: Intel(R) Core(TM) i7-9700K CPU @ 3.60GHz
              vendor: Intel Corp.
              physical id: 43
              bus info: cpu@0
              version: Intel(R) Core(TM) i7-9700K CPU @ 3.60GHz
              serial: [REMOVED]
              slot: LGA1151
              size: 4542MHz
              capacity: 4900MHz
              width: 64 bits
              clock: 100MHz
              capabilities: lm 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 x86-64 constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl smx 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 ssbd ibrs ibpb stibp ibrs_enhanced 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 md_clear flush_l1d arch_capabilities cpufreq
              configuration: cores=8 enabledcores=8 threads=8
         *-pci
              description: Host bridge
              product: 8th/9th Gen Core 8-core Desktop Processor Host Bridge/DRAM Registers [Coffee Lake S]
              vendor: Intel Corporation
              physical id: 100
              bus info: pci@0000:00:00.0
              version: 0d
              width: 32 bits
              clock: 33MHz
              configuration: driver=skl_uncore
              resources: irq:0
            *-pci:0
                 description: PCI bridge
                 product: 6th-10th Gen Core Processor PCIe Controller (x16)
                 vendor: Intel Corporation
                 physical id: 1
                 bus info: pci@0000:00:01.0
                 version: 0d
                 width: 32 bits
                 clock: 33MHz
                 capabilities: pci pm msi pciexpress normal_decode bus_master cap_list
                 configuration: driver=pcieport
                 resources: irq:120 memory:f6000000-f6ffffff ioport:e0000000(size=301989888)
               *-display
                    description: 3D controller
                    product: GP106 [P106-100]
                    vendor: NVIDIA Corporation
                    physical id: 0
                    bus info: pci@0000:01:00.0
                    version: a1
                    width: 64 bits
                    clock: 33MHz
                    capabilities: pm msi pciexpress bus_master cap_list
                    configuration: driver=nvidia latency=0
                    resources: irq:140 memory:f6000000-f6ffffff memory:e0000000-efffffff memory:f0000000-f1ffffff
            *-display
                 description: VGA compatible controller
                 product: CoffeeLake-S GT2 [UHD Graphics 630]
                 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:138 memory:f5000000-f5ffffff memory:d0000000-dfffffff ioport:f000(size=64) memory:c0000-dffff
            *-usb
                 description: USB controller
                 product: 200 Series/Z370 Chipset Family USB 3.0 xHCI Controller
                 vendor: Intel Corporation
                 physical id: 14
                 bus info: pci@0000:00:14.0
                 version: 00
                 width: 64 bits
                 clock: 33MHz
                 capabilities: pm msi xhci bus_master cap_list
                 configuration: driver=xhci_hcd latency=0
                 resources: irq:125 memory:f7210000-f721ffff
               *-usbhost:0
                    product: xHCI Host Controller
                    vendor: Linux 5.13.0-40-generic xhci-hcd
                    physical id: 0
                    bus info: usb@1
                    logical name: usb1
                    version: 5.13
                    capabilities: usb-2.00
                    configuration: driver=hub slots=16 speed=480Mbit/s
                  *-usb:0
                       description: Keyboard
                       product: USB Receiver
                       vendor: Logitech
                       physical id: 7
                       bus info: usb@1:7
                       version: 39.06
                       capabilities: usb-2.00
                       configuration: driver=usbhid maxpower=98mA speed=12Mbit/s
                  *-usb:1
                       description: Mouse
                       product: USB Receiver
                       vendor: Logitech
                       physical id: 8
                       bus info: usb@1:8
                       version: 2.01
                       capabilities: usb-2.00
                       configuration: driver=usbhid maxpower=98mA speed=12Mbit/s
               *-usbhost:1
                    product: xHCI Host Controller
                    vendor: Linux 5.13.0-40-generic xhci-hcd
                    physical id: 1
                    bus info: usb@2
                    logical name: usb2
                    version: 5.13
                    capabilities: usb-3.00
                    configuration: driver=hub slots=8 speed=5000Mbit/s
            *-communication
                 description: Communication controller
                 product: 200 Series PCH CSME HECI #1
                 vendor: Intel Corporation
                 physical id: 16
                 bus info: pci@0000:00:16.0
                 version: 00
                 width: 64 bits
                 clock: 33MHz
                 capabilities: pm msi bus_master cap_list
                 configuration: driver=mei_me latency=0
                 resources: irq:137 memory:f722d000-f722dfff
            *-sata
                 description: SATA controller
                 product: 200 Series PCH SATA controller [AHCI mode]
                 vendor: Intel Corporation
                 physical id: 17
                 bus info: pci@0000:00:17.0
                 version: 00
                 width: 32 bits
                 clock: 66MHz
                 capabilities: sata msi pm ahci_1.0 bus_master cap_list
                 configuration: driver=ahci latency=0
                 resources: irq:126 memory:f7228000-f7229fff memory:f722c000-f722c0ff ioport:f090(size=8) ioport:f080(size=4) ioport:f060(size=32) memory:f722b000-f722b7ff
            *-pci:1
                 description: PCI bridge
                 product: 200 Series PCH PCI Express Root Port #19
                 vendor: Intel Corporation
                 physical id: 1b
                 bus info: pci@0000:00:1b.0
                 version: f0
                 width: 32 bits
                 clock: 33MHz
                 capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
                 configuration: driver=pcieport
                 resources: irq:121 ioport:2000(size=4096) memory:b8000000-b81fffff ioport:b8200000(size=2097152)
            *-pci:2
                 description: PCI bridge
                 product: 200 Series PCH PCI Express Root Port #3
                 vendor: Intel Corporation
                 physical id: 1c
                 bus info: pci@0000:00:1c.0
                 version: f0
                 width: 32 bits
                 clock: 33MHz
                 capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
                 configuration: driver=pcieport
                 resources: irq:122 ioport:3000(size=4096) memory:b8400000-b85fffff ioport:b8600000(size=2097152)
            *-pci:3
                 description: PCI bridge
                 product: 200 Series PCH PCI Express Root Port #8
                 vendor: Intel Corporation
                 physical id: 1c.7
                 bus info: pci@0000:00:1c.7
                 version: f0
                 width: 32 bits
                 clock: 33MHz
                 capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
                 configuration: driver=pcieport
                 resources: irq:123 ioport:e000(size=4096) memory:f7100000-f71fffff
               *-network
                    description: Ethernet interface
                    product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
                    vendor: Realtek Semiconductor Co., Ltd.
                    physical id: 0
                    bus info: pci@0000:04:00.0
                    logical name: enp4s0
                    version: 15
                    serial: [REMOVED]
                    size: 100Mbit/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-fd autonegotiation
                    configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=5.13.0-40-generic duplex=full firmware=rtl8168h-2_0.0.2 02/26/15 ip=[REMOVED] latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s
                    resources: irq:19 ioport:e000(size=256) memory:f7104000-f7104fff memory:f7100000-f7103fff
            *-pci:4
                 description: PCI bridge
                 product: 200 Series PCH PCI Express Root Port #9
                 vendor: Intel Corporation
                 physical id: 1d
                 bus info: pci@0000:00:1d.0
                 version: f0
                 width: 32 bits
                 clock: 33MHz
                 capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
                 configuration: driver=pcieport
                 resources: irq:124 memory:f7000000-f70fffff
               *-storage
                    description: Non-Volatile memory controller
                    product: NVMe SSD Controller 980
                    vendor: Samsung Electronics Co Ltd
                    physical id: 0
                    bus info: pci@0000:05:00.0
                    version: 00
                    width: 64 bits
                    clock: 33MHz
                    capabilities: storage pm msi pciexpress msix nvm_express bus_master cap_list
                    configuration: driver=nvme latency=0
                    resources: irq:16 memory:f7000000-f7003fff
                  *-nvme0
                       description: NVMe device
                       product: Samsung SSD 980 500GB
                       physical id: 0
                       logical name: /dev/nvme0
                       version: 1B4QFXO7
                       serial: [REMOVED]
                       configuration: nqn=nqn.1994-11.com.samsung:nvme:980M.2:S64DNF0R605945R state=live
                     *-namespace
                          description: NVMe namespace
                          physical id: 1
                          logical name: /dev/nvme0n1
                          size: 465GiB (500GB)
                          capabilities: gpt-1.00 partitioned partitioned:gpt
                          configuration: guid=17ae2fda-7e88-4f3d-9939-1f5319ff1680 logicalsectorsize=512 sectorsize=512
                        *-volume:0
                             description: Windows FAT volume
                             vendor: mkfs.fat
                             physical id: 1
                             logical name: /dev/nvme0n1p1
                             logical name: /boot/efi
                             version: FAT32
                             serial: [REMOVED]
                             size: 510MiB
                             capacity: 511MiB
                             capabilities: boot fat initialized
                             configuration: FATs=2 filesystem=fat 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: EXT4 volume
                             vendor: Linux
                             physical id: 2
                             logical name: /dev/nvme0n1p2
                             logical name: /
                             version: 1.0
                             serial: [REMOVED]
                             size: 465GiB
                             capabilities: journaled extended_attributes large_files huge_files dir_nlink recover 64bit extents ext4 ext2 initialized
                             configuration: created=2022-04-13 19:46:09 filesystem=ext4 lastmountpoint=/ modified=2022-05-02 22:01:34 mount.fstype=ext4 mount.options=rw,relatime,errors=remount-ro,stripe=32 mounted=2022-05-02 22:01:35 state=mounted
            *-isa
                 description: ISA bridge
                 product: Intel Corporation
                 vendor: Intel Corporation
                 physical id: 1f
                 bus info: pci@0000:00:1f.0
                 version: 00
                 width: 32 bits
                 clock: 33MHz
                 capabilities: isa bus_master
                 configuration: latency=0
            *-memory UNCLAIMED
                 description: Memory controller
                 product: 200 Series/Z370 Chipset Family Power Management Controller
                 vendor: Intel Corporation
                 physical id: 1f.2
                 bus info: pci@0000:00:1f.2
                 version: 00
                 width: 32 bits
                 clock: 33MHz (30.3ns)
                 configuration: latency=0
                 resources: memory:f7224000-f7227fff
            *-multimedia
                 description: Audio device
                 product: 200 Series PCH HD Audio
                 vendor: Intel Corporation
                 physical id: 1f.3
                 bus info: pci@0000:00:1f.3
                 version: 00
                 width: 64 bits
                 clock: 33MHz
                 capabilities: pm msi bus_master cap_list
                 configuration: driver=snd_hda_intel latency=32
                 resources: irq:139 memory:f7220000-f7223fff memory:f7200000-f720ffff
            *-serial
                 description: SMBus
                 product: 200 Series/Z370 Chipset Family SMBus Controller
                 vendor: Intel Corporation
                 physical id: 1f.4
                 bus info: pci@0000:00:1f.4
                 version: 00
                 width: 64 bits
                 clock: 33MHz
                 configuration: driver=i801_smbus latency=0
                 resources: irq:16 memory:f722a000-f722a0ff ioport:f040(size=32)
         *-pnp00:00
              product: PnP device PNP0c02
              physical id: 1
              capabilities: pnp
              configuration: driver=system
         *-pnp00:01
              product: PnP device PNP0501
              physical id: 2
              capabilities: pnp
              configuration: driver=serial
         *-pnp00:02
              product: PnP device PNP0c02
              physical id: 3
              capabilities: pnp
              configuration: driver=system
         *-pnp00:03
              product: PnP device PNP0c02
              physical id: 4
              capabilities: pnp
              configuration: driver=system
         *-pnp00:04
              product: PnP device PNP0b00
              physical id: 5
              capabilities: pnp
              configuration: driver=rtc_cmos
         *-pnp00:05
              product: PnP device INT3f0d
              physical id: 6
              capabilities: pnp
              configuration: driver=system
         *-pnp00:06
              product: PnP device PNP0c02
              physical id: 7
              capabilities: pnp
              configuration: driver=system
         *-pnp00:07
              product: PnP device PNP0c02
              physical id: 8
              capabilities: pnp
              configuration: driver=system
         *-pnp00:08
              product: PnP device PNP0c02
              physical id: 9
              capabilities: pnp
              configuration: driver=system
         *-pnp00:09
              product: PnP device PNP0c02
              physical id: a
              capabilities: pnp
              configuration: driver=system
      *-power UNCLAIMED
           description: To Be Filled By O.E.M.
           product: To Be Filled By O.E.M.
           vendor: To Be Filled By O.E.M.
           physical id: 1
           version: To Be Filled By O.E.M.
           serial: [REMOVED]
           capacity: 32768mWh

    Last edited by aermak-am; May 2nd, 2022 at 07:18 PM. Reason: typo

  2. #2
    Join Date
    Jul 2005
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    I think I'm here! Maybe?
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    Distro
    Xubuntu 24.04 Noble Numbat

    Re: Ubuntu 21.04 and 20.04 randomly reboots on my PC

    I wonder if you have a temperature problem with the machine; overheating is sometimes the cause of random unannounced reboots.

    Alternatively, the hardware that can also cause this problem is a bad power supply unit so that is something that should be checked, though I have no idea how you can do that.
    Do you know if this was part of the checking that was done by your service people?

  3. #3
    Join Date
    Mar 2010
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    Squidbilly-Land
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    Hidden!
    Distro
    Ubuntu

    Re: Ubuntu 21.04 and 20.04 randomly reboots on my PC

    It could be anything. Did you swap different RAM? Test the RAM for at least 3 day?
    Do the system logs provide any hints? Kernel issues? Stack traces?

    BTW, there is little need to have more than 4.1G of swap for any system that doesn't hibernate. Extra would only be used when you load the system well beyond what it can handle and as the system slows down, you'll feel that happening and can take corrective steps - like closing the bloated browser and fat email program.

    For example:
    Code:
    $ free -mh
                  total        used        free      shared  buff/cache   available
    Mem:            31G         13G         13G        100M        4.1G         17G
    Swap:          4.3G        1.2M        4.3G

  4. #4
    Join Date
    May 2022
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    5

    Re: Ubuntu 21.04 and 20.04 randomly reboots on my PC

    Thanks for advice! I doubt that overheating is a problem, since there is little dust inside a corpus. Psensor shows that hardware temperature is no more than 35 degrees.

    I doubt competence of my service provider, but they said that they checked power supply unit.

    Might it be somewhat related to BIOS?

  5. #5
    Join Date
    May 2022
    Beans
    5

    Re: Ubuntu 21.04 and 20.04 randomly reboots on my PC

    I tried to change ram sockets, work with 1 ram unit in different sockets. It didn't help. There were reboots. I didn't find anything worrisome in logs. Though, I am not proficient in reading them and extract clues from there, so I might easily missed something important.

  6. #6
    Join Date
    Mar 2010
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    Squidbilly-Land
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    Distro
    Ubuntu

    Re: Ubuntu 21.04 and 20.04 randomly reboots on my PC

    When searching logs (I don't "read" them), I look for some keywords - error, warning, stack, refused, rejected. Be certain to search case insensitive. After finding those terms, I'll jump to a few lines above that in the specific log file to see if it might be related. I'll look at the timestamps - anything within 1-2 seconds could be related.

    PCs get short circuits sometimes. These can be caused by accident scraping or dust. Inside data centers, they carefully filter all the air and ensure the airflow is out of the systems with clean, filtered, air at the intake of the racks. There's a real problem with systems shorting. https://www.akcp.com/blog/how-data-c...contamination/ At home, the best we can do is to use foam filters on air intakes for our PCs, clean those yearly and for the smaller particles that get inside the case, vacuum those out yearly. If you see any dust around slots in a case or on the fans, it is passed time to clean the entire machine.

    I used to live in a place that had dust storms. Huge red clouds could be seen from miles away - it was a flat area. No matter how tightly we'd close up the 80 yr old building, that dust would still find a way inside. It was a mess.

    People with furry pets can have a terrible dander issue. I have dry skin and flake it off too. I keep a hand vacuum with a little brush to keep the dust off everything.

  7. #7
    Join Date
    May 2022
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    5

    Re: Ubuntu 21.04 and 20.04 randomly reboots on my PC

    I installed ubuntu 18.04 and it stopped rebooting. Any ideas why?

    EDIT: Nevermind. It still reboots. Though rarely.
    Last edited by aermak-am; May 5th, 2022 at 06:21 PM. Reason: Corrected information

  8. #8
    Join Date
    Jul 2005
    Beans
    106

    Re: Ubuntu 21.04 and 20.04 randomly reboots on my PC

    Most likelly it's a hardware problem. Installing various OSes won't fix it.

  9. #9
    Join Date
    Oct 2005
    Location
    Lab, Slovakia
    Beans
    10,804

    Re: Ubuntu 21.04 and 20.04 randomly reboots on my PC

    I would boot it it with install media and leave it running. The install system is very conservative and simple. If it still reboots, then you very probably do have a HW problem.

  10. #10
    Join Date
    May 2022
    Beans
    5

    Re: Ubuntu 21.04 and 20.04 randomly reboots on my PC

    Thanks to everyone! After replacement of motherboard the problem has gone.
    Last edited by aermak-am; May 30th, 2022 at 12:49 PM. Reason: Edited the cause of problem.

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