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I am getting Kernel panic Ubuntu 20.04 when trying to shutdown. Reboot somehow goes through. Tried shutdown using init 0 or from the GUI yielding same result. image here https://i.redd.it/a2w2rlci1mw41.jpg. How to troubleshoot this error message sudo lshw -C memory

*-firmware                
       description: BIOS
       vendor: Alienware
       physical id: 0
       version: 1.0.21
       date: 02/25/2020
       size: 64KiB
       capacity: 16MiB
       capabilities: pci pnp upgrade shadowing cdboot bootselect edd int13floppy1200 int13floppy720 int13floppy2880 int5printscreen int14serial int17printer acpi usb biosbootspecification netboot uefi
  *-memory
       description: System Memory
       physical id: 2d
       slot: System board or motherboard
       size: 32GiB
     *-bank:0
          description: DIMM DDR4 Synchronous Unbuffered (Unregistered) 2666 MHz (0.4 ns)
          product: KHX2666C16/16G
          vendor: 00002B0C0000
          physical id: 0
          serial: 11298D68
          slot: ChannelA-DIMM0
          size: 16GiB
          width: 64 bits
          clock: 2666MHz (0.4ns)
     *-bank:1
          description: DIMM [empty]
          physical id: 1
          slot: ChannelA-DIMM1
     *-bank:2
          description: DIMM DDR4 Synchronous Unbuffered (Unregistered) 2666 MHz (0.4 ns)
          product: KHX2666C16/16G
          vendor: 00002B0C0000
          physical id: 2
          serial: 0B29EE67
          slot: ChannelB-DIMM0
          size: 16GiB
          width: 64 bits
          clock: 2666MHz (0.4ns)
     *-bank:3
          description: DIMM [empty]
          physical id: 3
          slot: ChannelB-DIMM1
  *-cache:0
       description: L1 cache
       physical id: 34
       slot: L1 Cache
       size: 384KiB
       capacity: 384KiB
       capabilities: synchronous internal write-back unified
       configuration: level=1
  *-cache:1
       description: L2 cache
       physical id: 35
       slot: L2 Cache
       size: 1536KiB
       capacity: 1536KiB
       capabilities: synchronous internal write-back unified
       configuration: level=2
  *-cache:2
       description: L3 cache
       physical id: 36
       slot: L3 Cache
       size: 9MiB
       capacity: 9MiB
       capabilities: synchronous internal write-back unified
       configuration: level=3
  *-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:ec100000-ec103fff
  • why reboot works and shutdown does not – Mrinal Bhattacharjee May 3 at 20:48
  • Muc more detail is needed. Is it a fresh install or a modifiesd system? What is the hardware? I can't reproduce it, so the question doesn't conatain any information. – Pilot6 May 3 at 20:49
  • fresh install on dell alienware r7 dual boot. windows is installed on an nvme 256 gb drive. intel i5 8400, 32G ram, 512 GB SSD (the one where ubuntu is installed) nvdia 1050ti asus gpu – Mrinal Bhattacharjee May 3 at 20:50
  • Did you install Nvidia drivers? – Pilot6 May 3 at 20:51
  • for FC32 kernel panic is consistent irrespective of shutdown or reboot. with / without nvdia drivers. in ubuntu the reboot works but why not shutdown. how to troubleshoot further. yet to install nvdia drivers on ubuntu – Mrinal Bhattacharjee May 3 at 20:52
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BIOS

Note: Backup important files before performing a BIOS update.

You have BIOS 1.0.19, and the latest is 1.0.21, and can be downloaded here.

Memory

Go here and download/run their free memtest to test your memory. Get at least one complete pass of all the 4/4 tests to confirm good memory. This may take many hours to complete.

Nvidia

Confirm that you have Nvidia driver 440.82 installed. It can be downloaded here.

SSD

If your SSD is Samsung, in Windows, download their Samsung Magician software and check your firmware. Download it here.

| improve this answer | |
  • 1. Bios update done 2. Shall perfofm the memtest and will tag you 3. nvdia driver details below Graphics: Device-1: Intel UHD Graphics 630 driver: i915 v: kernel Device-2: NVIDIA GP107 [GeForce GTX 1050 Ti] driver: nvidia v: 440.64 Display: x11 server: X.Org 1.20.8 driver: modesetting,nvidia unloaded: fbdev,nouveau,vesa resolution: 2560x1440~60Hz, 2560x1440~60Hz OpenGL: renderer: GeForce GTX 1050 Ti/PCIe/SSE2 v: 4.6.0 NVIDIA 440.64 4. SSD is Fujitsu tried installing on a toshiba HDD same result hence ruling it out. – Mrinal Bhattacharjee May 4 at 4:54
  • @MrinalBhattacharjee It looks like you're a candidate for a newer Nvidia driver. After that, check your shutdown again. Report back. Also... please edit your question and show me sudo lshw -C memory and free -h and sysctl vm.swappiness. – heynnema May 4 at 11:45
  • sudo lshw -C memory – Mrinal Bhattacharjee May 5 at 1:00
  • vm.swappiness = 60 – Mrinal Bhattacharjee May 5 at 1:03
  • free -h total used free shared buff/cache available Mem: 31Gi 3.4Gi 22Gi 618Mi 5.0Gi 26Gi Swap: 2.0Gi 0B 2.0Gi – Mrinal Bhattacharjee May 5 at 1:03

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