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F. Addari
Asked: 2020-11-25 07:52:50 +0800 CST

Ubuntu 20.04 random freezes

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I am experiencing weird freeze of Ubuntu 20.04. I cannot move the cursor, audio stops and I have to hard reboot with the power button. I have a Dell Inspiron 15 7501 (+8GB ram installed by myself) since a month or so, and I installed Ubuntu 20.04 with Win10 Home in dual boot as soon as I received the laptop. Everything in Win10 works fine, and also on Ubuntu since yesterday. I have not installed anything in the past few days.

Initially It happened 3 times when having 1 Mozilla tab with Overleaf, some pdfs (2 or 3) and a python3 shell used as a calculator, running nothing. The fourth time I had 3 Mozilla tab and 1 pdf.

I already tried to increase the swap memory from 2Gb to 8Gb as suggested here Ubuntu 20.04 random freeze ups but it didn't work. I post here the link to the system log files retrieved with the command cat /var/log/syslog of the third and fourth freeze:

3rd - https://drive.google.com/file/d/14mukUNN1VoGJjiKXhw29WHauxNjkjspY/view?usp=sharing

4th - https://drive.google.com/file/d/1CBTFliwg8RA96UpeMGsGuuJ3ZBKBdM73/view?usp=sharing

Sorry for the google drive link, I have no idea on how to share this kind of terminal output in a simple way.

Thank you for your help

Francesco

Edit as requested:

free -h
              total        used        free      shared  buff/cache   available
Mem:           15Gi       1,5Gi        12Gi       220Mi       1,4Gi        13Gi
Swap:         8,0Gi          0B       8,0Gi

sysctl vm.swappiness
vm.swappiness = 60

sudo lshw -C memory

PCI (sysfs)  
  *-firmware                
       description: BIOS
       vendor: Dell Inc.
       physical id: 0
       version: 1.3.0
       date: 08/18/2020
       size: 1MiB
       capacity: 24MiB
       capabilities: pci pnp upgrade shadowing cdboot bootselect edd int5printscreen int9keyboard int14serial int17printer acpi usb smartbattery biosbootspecification netboot uefi
  *-cache:0
       description: L1 cache
       physical id: 700
       slot: L1 Cache
       size: 256KiB
       capacity: 256KiB
       capabilities: synchronous internal write-back unified
       configuration: level=1
  *-cache:1
       description: L2 cache
       physical id: 701
       slot: L2 Cache
       size: 1MiB
       capacity: 1MiB
       capabilities: synchronous internal write-back unified
       configuration: level=2
  *-cache:2
       description: L3 cache
       physical id: 702
       slot: L3 Cache
       size: 8MiB
       capacity: 8MiB
       capabilities: synchronous internal write-back unified
       configuration: level=3
  *-memory
       description: System Memory
       physical id: 1000
       slot: System board or motherboard
       size: 16GiB
     *-bank:0
          description: SODIMM DDR4 Synchronous 3200 MHz (0,3 ns)
          vendor: 000000003180
          physical id: 0
          serial: 00000000
          slot: Motherboard
          size: 8GiB
          width: 64 bits
          clock: 3200MHz (0.3ns)
     *-bank:1
          description: SODIMM DDR4 Synchronous 3200 MHz (0,3 ns)
          product: CT8G4SFRA32A.C4FE
          vendor: 859B00000000
          physical id: 1
          serial: E3742A1E
          slot: DIMM B
          size: 8GiB
          width: 64 bits
          clock: 3200MHz (0.3ns)
  *-memory UNCLAIMED
       description: RAM memory
       product: Comet Lake PCH Shared SRAM
       vendor: Intel Corporation
       physical id: 14.2
       bus info: pci@0000:00:14.2
       version: 00
       width: 64 bits
       clock: 33MHz (30.3ns)
       capabilities: pm cap_list
       configuration: latency=0
       resources: iomemory:600-5ff iomemory:600-5ff memory:6023120000-6023121fff memory:6023128000-6023128fff

grep -i swap /etc/fstab
/swapfile                                 none            swap    sw              0       0

ls -al /var/crash
totale 4028
drwxrwsrwt  2 root      whoopsie    4096 nov 24 18:45 .
drwxr-xr-x 14 root      root        4096 lug 31 18:35 ..
-rw-r-----  1 francesco whoopsie 4108506 nov 24 18:45 _usr_bin_seahorse.1000.crash
-rw-r--r--  1 francesco whoopsie       0 nov 24 18:45 _usr_bin_seahorse.1000.upload
-rw-------  1 whoopsie  whoopsie      37 nov 24 18:45 _usr_bin_seahorse.1000.uploaded

sudo dmidecode -s bios-version
1.3.0
inspiron freeze dell 20.04

1 Answers

  1. BIOS

    Dell Inspiron 15 7501

    You have BIOS 1.3.0.

    There's a newer BIOS available, version 1.4.1, dated Sept 30, 2020, and can be downloaded here.

    Note: Verify that I have the correct web page for your model #.

    Note: Have good backups before updating the BIOS.

    memory

    Go to https://www.memtest86.com/ 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.

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