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DW Blackjack Cube-LX Freezing Fix

DW Blackjack® Cube-LX Freezing Fix


Affected Roles:  Administrator, Owner

Related Digital Watchdog VMS Apps:  DW Spectrum

Complexity:  Medium to High

Software Version:  DW Spectrum v4.0 or higher; Ubuntu OS 16.04

Last Edit:  July 24, 2020


DW Blackjack® (Linux) Crashing

When DW Spectrum® IPVMS or a DW Blackjack® Cube-LX encounters freezing issues or crashing issues, the problem is typically a result of CPU overages or OS related problems. However, you may be able to use the method covered by this article to resolve your problem.

This article will outline a possible troubleshooting method using the Linux Command Line for resolving Operating System (OS) crashes or freezing. 

Note:  This method should only be used after verifying that the setup is within the DW Spectrum Server’s specifications (no more than 16 cameras 2.1MP/1080p @30fps, with medium recording quality) and confirming that the DW Spectrum Client is not open and causing CPU overages.

Note: For issues regarding your DW Spectrum desktop client freezing, check out Using A DW Spectrum Server As A Client.

Symptoms Include:

  • Need to manually reboot the DW Spectrum Server to regain access
  • HDD/SSD errors occur in DW Spectrum
  • Ubuntu 16.04 keeps crashing or freezing

Supported/Affected Devices:

  • DW Blackjack® Cube (Ubuntu/Linux OS)

Using the Linux Command Line

To use this troubleshooting method:

  1. Open the Terminal (CTRL+ALT+T) and log in as the Super User with the following commands:
    1. sudo su (then press Enter on your keyboard)
    2. admin (then press Enter on your keyboard)
    3. sudo nano /etc/default/grub (then press Enter on your keyboard)

Note:  Linux commands are case sensitive.  Be sure that you are not adding extra spaces and follow the commands as outlined in this article.

  1. The GNU Editor will display and allow you to edit the GRUB configuration.  Change the corresponding line as outlined below:
    1. GRUB_CMDLINE_LINUX_DEFAULT=”quiet splash intel_idle.max_cstate=1”

  1. To save the changes:
    1. Use CTRL+X on your keyboard
    2. Press the Y key on your keyboard (to confirm the modified buffer)
    3. Press the Enter key on your keyboard

  1. The Terminal will display again.

Enter the command, update-grub , then press the Enter key on your keyboard.

  1. Reboot the DW Blackjack® Cube-LX.

Once the unit has finished rebooting, open the Terminal (CTRL+ALT+T) and repeat Step 1.

    1. sudo su (then press Enter on your keyboard)
    2. admin (then press Enter on your keyboard)
    3. sudo nano /etc/default/grub (then press Enter on your keyboard)

Confirm that the change to the GRUB (Grand Unified Bootloader), from Step 2 was saved successfully.  If so, you may exit the Terminal.

Note:  If the OS freezing or crashing issues persist, please contact Digital Watchdog Technical Support for further assistance.

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  • 25-Jul-2020