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  • Unstable system (SOLVED)

    From Grimble@2:250/1 to All on Thu Aug 5 11:48:24 2021
    Got my system back from the supplier recently. Although the information
    under "Engineer Diagnostics" was quite sparse, it included the line "The
    CPU was replaced and full testing completed with no issues". So, duff
    CPU! I took the plunge and re-installed Mageia 8; since the restart, no stability problems.
    --
    Grimble
    Registered Linux User #450547
    Machine 'Bach' running Plasma 5.20.4 on 5.10.52-desktop-1.mga8 kernel.
    Mageia release 8 (Official) for x86_64

    --- MBSE BBS v1.0.7.22 (GNU/Linux-x86_64)
    * Origin: A noiseless patient Spider (2:250/1@fidonet)
  • From faeychild@2:250/1 to All on Thu Aug 5 23:53:36 2021
    On 5/8/21 8:48 pm, Grimble wrote:
    Got my system back from the supplier recently. Although the information under "Engineer Diagnostics" was quite sparse, it included the line "The
    CPU was replaced and full testing completed with no issues". So, duff
    CPU! I took the plunge and re-installed Mageia 8; since the restart, no stability problems.


    I have been reliably informed that it is NEVER the CPU --
    unless it is!!

    :-)

    --
    faeychild
    Running plasmashell 5.20.4 on 5.10.41-desktop-1.mga8 kernel.
    Mageia release 8 (Official) for x86_64 installed via Mageia-8-x86_64-DVD.iso


    --- MBSE BBS v1.0.7.22 (GNU/Linux-x86_64)
    * Origin: A noiseless patient Spider (2:250/1@fidonet)
  • From David W. Hodgins@2:250/1 to All on Fri Aug 6 01:04:47 2021
    On Thu, 05 Aug 2021 18:53:36 -0400, faeychild <faeychild@nomail.afraid.org> wrote:
    On 5/8/21 8:48 pm, Grimble wrote:
    Got my system back from the supplier recently. Although the information
    under "Engineer Diagnostics" was quite sparse, it included the line "The
    CPU was replaced and full testing completed with no issues". So, duff
    CPU! I took the plunge and re-installed Mageia 8; since the restart, no
    stability problems.

    I have been reliably informed that it is NEVER the CPU --
    unless it is!!

    This is the first case I've heard of where a faulty cpu only caused instability rather then simply failing to boot. Makes sense, but has to be pretty rare. Probably the old cpu would have been ok if the speed was forced to be lower in the bios or uefi firmware settings and/or the voltages increased slightly.

    Regards, Dave Hodgins

    --
    Change dwhodgins@nomail.afraid.org to davidwhodgins@teksavvy.com for
    email replies.

    --- MBSE BBS v1.0.7.22 (GNU/Linux-x86_64)
    * Origin: A noiseless patient Spider (2:250/1@fidonet)
  • From faeychild@2:250/1 to All on Fri Aug 6 05:31:41 2021
    On 6/8/21 10:04 am, David W. Hodgins wrote:


    This is the first case I've heard of where a faulty cpu only caused instability
    rather then simply failing to boot. Makes sense, but has to be pretty rare. Probably the old cpu would have been ok if the speed was forced to be
    lower in
    the bios or uefi firmware settings and/or the voltages increased slightly.

    Regards, Dave Hodgins



    I could be educational - with an old motherboard - just to try every
    bios setting to extreme and see what happens

    --
    faeychild
    Running plasmashell 5.20.4 on 5.10.41-desktop-1.mga8 kernel.
    Mageia release 8 (Official) for x86_64 installed via Mageia-8-x86_64-DVD.iso


    --- MBSE BBS v1.0.7.22 (GNU/Linux-x86_64)
    * Origin: A noiseless patient Spider (2:250/1@fidonet)
  • From David W. Hodgins@2:250/1 to All on Fri Aug 6 06:35:18 2021
    On Fri, 06 Aug 2021 00:31:41 -0400, faeychild <faeychild@nomail.afraid.org> wrote:
    On 6/8/21 10:04 am, David W. Hodgins wrote:
    This is the first case I've heard of where a faulty cpu only caused
    instability
    rather then simply failing to boot. Makes sense, but has to be pretty rare. >> Probably the old cpu would have been ok if the speed was forced to be
    lower in
    the bios or uefi firmware settings and/or the voltages increased slightly.

    I could be educational - with an old motherboard - just to try every
    bios setting to extreme and see what happens

    In the past, I used to overclock the cpu. As well as increasing the speed, the voltage had to be increased for the maximum the cpu/mb combo would tolerate.

    Finding that tolerance level was a matter of increasing the speed and voltage to the max, and then decreasing first the cpu speed, then the voltage to find the highest cpu speed that would work, and with the lowest voltage (to minimize extra heat) that speed would work at.

    I found, the cpu either booted, or it didn't. Never encountered a setting where it
    booted, but was unstable. Doesn't surprise me, just never encountered it myself.

    Regards, Dave Hodgins.

    --
    Change dwhodgins@nomail.afraid.org to davidwhodgins@teksavvy.com for
    email replies.

    --- MBSE BBS v1.0.7.22 (GNU/Linux-x86_64)
    * Origin: A noiseless patient Spider (2:250/1@fidonet)
  • From faeychild@2:250/1 to All on Fri Aug 6 23:35:13 2021
    On 6/8/21 3:35 pm, David W. Hodgins wrote:


    I found, the cpu either booted, or it didn't. Never encountered a
    setting where it
    booted, but was unstable. Doesn't surprise me, just never encountered it myself.

    Regards, Dave Hodgins.


    Many years ago I got adventurous and tried to compile a kernel.

    The CPU got red hot and started stepping down the clock slower and slower.
    So I tried lowering core voltage until the system failed to boot.

    Haven't tried since. I have plenty of room for a larger kernel now

    regards
    --
    faeychild
    Running plasmashell 5.20.4 on 5.10.41-desktop-1.mga8 kernel.
    Mageia release 8 (Official) for x86_64 installed via Mageia-8-x86_64-DVD.iso


    --- MBSE BBS v1.0.7.22 (GNU/Linux-x86_64)
    * Origin: A noiseless patient Spider (2:250/1@fidonet)