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I am experiencing random freezes in Ubuntu. I went through several fixes proposed (checking nvidia drivers, etc..) but no solution. I bumped into Ubuntu 17.04 Freezing Issue and tried to change the crypttab. I followed the instruction but upon opening with Gedit or nano the file was empty. Could this be the issue?

EDIT: The computer was assembled by me. With:

MSI 1151 Z170A Krait Gaming 3X Motherboard
Intel I7-6700K 1151 Skylake 8MB Cache 4.00 GHz Processor
Crucial Ballistix Sport LT 64GB set 16GBx4 DDR4 2400 288pin whit RAM
Nvidia GeForce GT610

The driver from nvidia I installed is the 340.135 so I am not using the Xorg nouveau stuff.

Also I changed GRUB to include

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash intel_idle.max_cstate=1"

blkid:

/dev/sda1: UUID="5AAD-028F" TYPE="vfat" PARTLABEL="EFI System Partition" PARTUUID="39bd6592-a9af-4cba-bc68-0bcc9a860d9c"
/dev/sda2: UUID="6832cbef-4ee4-422d-9424-fbb307ed1ec1" TYPE="ext4" PARTUUID="7a631023-db65-417f-ad30-039a619320ac"
/dev/sdb1: UUID="7c3e97ec-2fc4-42df-801f-6dff9dec4ee6" TYPE="ext4" PARTUUID="1113ee0c-6451-4762-a15d-bafe9a9c80ed"

/etc/fstab:

# /etc/fstab: static file system information.
# Use 'blkid' to print the universally unique identifier for a device; this may be used with UUID= as a more robust way to name devices that works even if disks are added and removed. See fstab(5).
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
# / was on /dev/sda2 during installation
UUID=6832cbef-4ee4-422d-9424-fbb307ed1ec1 /               ext4    errors=remount-ro 0       1
# /boot/efi was on /dev/sda1 during installation
UUID=5AAD-028F  /boot/efi       vfat    umask=0077      0       1
# /home was on /dev/sdb1 during installation
UUID=7c3e97ec-2fc4-42df-801f-6dff9dec4ee6 /home           ext4    defaults        0       2
/swapfile 
                                none            swap    sw              0       0
UUID=5AAD-028F  /boot/efi   vfat    defaults    0   1

free -h:

              total        used        free      shared  buff/cache   available
Mem:            62G        1.1G         60G        135M        812M         61G
Swap:          2.0G          0B        2.0G

swapon -s:

Filename                Type        Size    Used    Priority
/swapfile                               file        2097148 0   -1

lshw:

  *-firmware                
       description: BIOS
       vendor: American Megatrends Inc.
       physical id: 0
       version: 2.70
       date: 10/17/2016
       size: 64KiB
       capacity: 15MiB
       capabilities: pci 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: 64GiB
     *-bank:0
          description: DIMM DDR4 Synchronous 2133 MHz (0.5 ns)
          product: BLS16G4D240FSC.16FAD
          vendor: 859B
          physical id: 0
          serial: A01EE062
          slot: ChannelA-DIMM0
          size: 16GiB
          width: 64 bits
          clock: 2133MHz (0.5ns)
     *-bank:1
          description: DIMM DDR4 Synchronous 2133 MHz (0.5 ns)
          product: KHX2400C14D4/16G
          vendor: Kingston
          physical id: 1
          serial: A82A51FA
          slot: ChannelA-DIMM1
          size: 16GiB
          width: 64 bits
          clock: 2133MHz (0.5ns)
     *-bank:2
          description: DIMM DDR4 Synchronous 2133 MHz (0.5 ns)
          product: BLS16G4D240FSC.16FAD
          vendor: 859B
          physical id: 2
          serial: A01EE17E
          slot: ChannelB-DIMM0
          size: 16GiB
          width: 64 bits
          clock: 2133MHz (0.5ns)
     *-bank:3
          description: DIMM DDR4 Synchronous 2133 MHz (0.5 ns)
          product: KHX2400C14D4/16G
          vendor: Kingston
          physical id: 3
          serial: A12A5202
          slot: ChannelB-DIMM1
          size: 16GiB
          width: 64 bits
          clock: 2133MHz (0.5ns)
  *-cache:0
       description: L1 cache
       physical id: 42
       slot: L1 Cache
       size: 256KiB
       capacity: 256KiB
       capabilities: synchronous internal write-back unified
       configuration: level=1
  *-cache:1
       description: L2 cache
       physical id: 43
       slot: L2 Cache
       size: 1MiB
       capacity: 1MiB
       capabilities: synchronous internal write-back unified
       configuration: level=2
  *-cache:2
       description: L3 cache
       physical id: 44
       slot: L3 Cache
       size: 8MiB
       capacity: 8MiB
       capabilities: synchronous internal write-back unified
       configuration: level=3
  *-memory UNCLAIMED
       description: Memory controller
       product: Sunrise Point-H PMC
       vendor: Intel Corporation
       physical id: 1f.2
       bus info: pci@0000:00:1f.2
       version: 31
       width: 32 bits
       clock: 33MHz (30.3ns)
       capabilities: bus_master
       configuration: latency=0
       resources: memory:dd444000-dd447fff
David Foerster
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Neco
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2 Answers2

1

I've taken a look at your information. Here are my findings. Your /etc/fstab has errors. Your /etc/default/grub has errors. Lets check if intel-microcode is installed. Run memtest.

To fix /etc/fstab...

In terminal...

gksudo gedit /etc/fstab

Change this:

/boot/efi was on /dev/sda1 during installation
UUID=5AAD-028F /boot/efi vfat umask=0077 0 1

/home was on /dev/sdb1 during installation
UUID=7c3e97ec-2fc4-42df-801f-6dff9dec4ee6 /home ext4 defaults 0 2

/swapfile none swap sw 0 0 UUID=5AAD-028F /boot/efi vfat defaults 0 1

To this:

/boot/efi was on /dev/sda1 during installation
UUID=5AAD-028F /boot/efi vfat umask=0077 0 1
# UUID=5AAD-028F /boot/efi vfat defaults 0 1 # we may use this later

/home was on /dev/sdb1 during installation
UUID=7c3e97ec-2fc4-42df-801f-6dff9dec4ee6 /home ext4 defaults 0 2

/swapfile none swap sw 0 0

To fix /etc/default/grub...

In terminal...

gksudo gedit /etc/default/grub

Change this:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash intel_idle.max_cstate=1"

To this:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

In terminal...

sudo update-grub

sudo apt-get update
sudo apt-get install intel-microcode

Lastly, go to www.memtest86.org and download the free memory test. Run at least one complete pass... more if you have the time.

Update #1:

Memtest failed, as I suspected. Follow the following procedure, BUT FIRST make sure that you've updated the BIOS, as it resolves some memory issues.

To determine which of 4 memory sticks may be defective... (we already know that when all 4 memory sticks are present, memtest fails. BIOS not updated yet).

If the BIOS is updated, run memtest with all 4 memory sticks inserted, and see if it passes one or more times. If it runs fine, then you're done. Congratulations! If memtest errors/crashes/freezes then continue on...

First note the output of sudo lshw -C memory (which you've already done). See where it says "slot: ChannelA-DIMM0"? There is also "slot: ChannelA-DIMM1". And similar for ChannelB.

When memory is properly installed in only one pair, one stick should show in "slot: ChannelA-DIMM0" and the other should show in "slot: ChannelB-DIMM0".

Test #1: Insert only one pair of sticks such that the lshw display shows as in the previous paragraph. Run memtest. If it runs without errors or freezing/crashing, then those two sticks may be good. If memtest fails, then one/both sticks are bad.

Test #2: Now remove those two sticks, and insert the other two sticks into the same slots and run memtest again.

If you have trouble during test #1 or #2, then we'll have to test each memory stick by itself.

Update #2:

Turned out to be dust in the SIMM slots. Memtest is running good now.

heynnema
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-1

I know this answer might seems stupid, but it worked for me with some problem similar to yours. Try opening a terminal and type in:

sudo apt-get autoremove 
sudo apt-get install -f
Eliah Kagan
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Juan Pimentel
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