xorg-x11-6.8.2-1.FC3.13 appears to not like multiprocessors

From: Seth Alford (setha_at_aracnet.com)
Date: 03/31/05

  • Next message: Mark Weaver: "Re: top posting, HTML posting and "the closer"" 
    Date: Wed, 30 Mar 2005 19:28:28 -0800
To: fedora-list@redhat.com

    I have a dual processor Dell Precision 650. As of today, X will freezes
    shortly after it starts, but, only with the second processor enabled. If
    I go into the BIOS, and disable the second processor, then X works. If I
    re-enable the second processor, X freezes again.

    Two things happened today.

    1. I opened up the machine and blew out all of the dust. I could have jostled
        something and caused the second processor to break.

    2. This morning up2date installed a new version of xorg software:

    [Wed Mar 30 07:13:27 2005] up2date installing packages: ['foomatic-3.0.2-13.3', 'krb5-devel-1.3.6-5', 'krb5-libs-1.3.6-5', 'krb5-workstation-1.3.6-5', 'telnet-0.17-32.FC3.2', 'xorg-x11-6.8.2-1.FC3.13', 'xorg-x11-Mesa-libGL-6.8.2-1.FC3.13', 'xorg-x11-Mesa-libGLU-6.8.2-1.FC3.13', 'xorg-x11-Xdmx-6.8.2-1.FC3.13', 'xorg-x11-Xnest-6.8.2-1.FC3.13', 'xorg-x11-Xvfb-6.8.2-1.FC3.13', 'xorg-x11-deprecated-libs-6.8.2-1.FC3.13', 'xorg-x11-deprecated-libs-devel-6.8.2-1.FC3.13', 'xorg-x11-devel-6.8.2-1.FC3.13', 'xorg-x11-doc-6.8.2-1.FC3.13', 'xorg-x11-font-utils-6.8.2-1.FC3.13', 'xorg-x11-libs-6.8.2-1.FC3.13', 'xorg-x11-sdk-6.8.2-1.FC3.13', 'xorg-x11-tools-6.8.2-1.FC3.13', 'xorg-x11-twm-6.8.2-1.FC3.13', 'xorg-x11-xauth-6.8.2-1.FC3.13', 'xorg-x11-xdm-6.8.2-1.FC3.13', 'xorg-x11-xfs-6.8.2-1.FC3.13']

    In the process of diagnoising this problem I logged in on several of the
    control-alt-FN alternative screens, while the second processor was enabled.
    I was able to run multiple du processes, and the machine didn't freeze.
    So I don't think that I broke processor 2.

    I hit upon the idea of trying to disable the second processor because I had
    seen references to X freezes on this list. One suggestion to fix it was to
    disable hyperthreading, which simlates having a second processor. I tried
    that. It worked. But now I only have half of my available processors
    running. Yes, most of the time, surfing the web, I wouldn't notice it.
    But when I'm doing multiple tar -j's for a backup, I will.

    So here are my questions:

    1. Anyone else running FC3 on a dual processor? Are you seeing this problem?
    2. Would this be better reported here, or to xorg? Does xorg mind having
        bugs submitted against xorg packages with a "FC3" as part of the package
        name? Or are they going to tell me something like "Oh, those packages
        were modified by the Fedora project. We won't do anything about this
        problem until you show us that it happened with our unadulterated packages."
    3. Does it matter that the bogomips on the second processor are not equal
        to the bogomips on the first processor? (I would include the 2 different
        numbers here, but /proc/cpuinfo is only telling me about the first
        processor, since the second processor is diabled in BIOS.)
    4. How to go back to the previous xorg release? Get it from the fedora
        web page?

    Thanks,

    --Seth Alford
    setha@aracnet.com 

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