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Thread: Random System Freezing in Ubuntu 18.04.1 LTS

  1. #21
    Join Date
    Dec 2018
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    Re: Random System Freezing in Ubuntu 18.04.1 LTS

    *Update*

    I have rolled back to the original BIOS and have my PC back finally but still with the random system lockups / freezing. Someonebody I thought on this thread mentioned tweaking some CPU or memory settings in UEFI. I wish I could find it.

  2. #22
    Join Date
    Dec 2018
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    Re: Random System Freezing in Ubuntu 18.04.1 LTS

    Quote Originally Posted by CatKiller View Post
    Ctrl-Alt-Del wouldn't have done anything, anyway. Possibly it might trigger the logout dialogue, depending on which keyboard shortcuts you've set. The safe restart key combination that you're after is holding down Alt and pressing the SysRq key (which is normally also the Print Screen key - you might also need the Shift key) and then, in turn, R E I S U B (busier backwards, to help you remember). Leave a few seconds between each letter.

    You've really not given us much to work with at all. Since you haven't said that it's triggered by any particular activity, I'm going to assume that it happens on idle. I'm also going to assume that your hardware is adequate and is properly configured.

    Go into your BIOS and bump up the VCore a notch. You'll probably have to set the VCore to Normal rather than Auto, and then you'll want the smallest positive offset you can give it. This will hopefully stop the processor voltage dropping too low when it enters an idle state, which might otherwise cause it to hang.

    If that doesn't help, you'll need to provide more details about what's happening when your system hangs.
    Ok I think I will try this next.

  3. #23
    Join Date
    Dec 2018
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    Question Re: Still Random System Freezing in Ubuntu 18.04.2 LTS

    *UPDATE*

    So I have tweaked my RAM speed in motherboard settings. The memory is G.Skill Aegis DDR4 3000 16GB. I've changed the speed down to 2400 and then up to 2800 after finding out that my motherboard might not sync well at the 3000 speed that my ram made for. I'm still encountering random OS freezes. I'm not tweaking the bios for now as my previous attempts rendered my OS un-bootable. I'm still not clear on changing Vcore settings in Motherboard settings. Could this be a graphics driver problem? I'm seeing others with similar problems in this version of Ubuntu.


    Motherboard: AsRock AB350Pro4
    CPU: AMD Ryzen 5 2400G w/ Vega 11 graphics

  4. #24
    Join Date
    Aug 2019
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    1

    Re: Random System Freezing in Ubuntu 18.04.1 LTS

    I have basically the same hardware: a new pc build with a Ryzen 5 2400 cpu w/ integrated Radon Vega 11 graphics, a 500gb SSD, and 32gb of RAM.

    I get random freezes that I can only get out of by doing a hard reboot (REISUB doesn't seem to work). It happens on various applications ). I thought it might be the Chrome browser, but it happens with other apps. There is nothing in /var/logs around the crash times and I don't see any kernel issue in dmesg. The freezes don't seem to happen after a particular amount of time (i.e. it varies). The freezes only happen when I'm using the computer (i.e. not when it is idle).

    I'm wondering if it's not the graphic card, but since it is integrated I'm not sure where to go from here.

  5. #25
    Topsiho's Avatar
    Topsiho is offline Grande Half-n-Half Cinnamon Ubuntu
    Join Date
    Oct 2005
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    Holland
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    Distro
    Ubuntu 16.04 Xenial Xerus

    Re: Random System Freezing in Ubuntu 18.04.1 LTS

    If you suspect your integrated graphics card, you can circumvent it by adding a spare, or cheap, additional graphics card and then see what happens.

    Greetz from Topsiho

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