From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4B7F0C433E0 for ; Wed, 1 Jul 2020 02:47:53 +0000 (UTC) Received: from shelob.surriel.com (shelob.surriel.com [96.67.55.147]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 04FE7206EB for ; Wed, 1 Jul 2020 02:47:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="RZtRsZCs" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 04FE7206EB Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kernelnewbies-bounces@kernelnewbies.org Received: from localhost ([::1] helo=shelob.surriel.com) by shelob.surriel.com with esmtp (Exim 4.94) (envelope-from ) id 1jqSmK-0008LJ-3U; Tue, 30 Jun 2020 22:47:16 -0400 Received: from mail-qt1-x82f.google.com ([2607:f8b0:4864:20::82f]) by shelob.surriel.com with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.94) (envelope-from ) id 1jqSmH-0008LD-2x for Kernelnewbies@kernelnewbies.org; Tue, 30 Jun 2020 22:47:13 -0400 Received: by mail-qt1-x82f.google.com with SMTP id u17so17378605qtq.1 for ; Tue, 30 Jun 2020 19:47:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=65Lb9qUYvL+TtRCJQNaCYe75zyZB0A/F6ddO/rGUvVs=; b=RZtRsZCs1NDJAch4MibIDogGxCGQvAVPwfIHcrRuJIotG6759I+5sb5Nw6ONu/13sf cfXTsZsL7tUU5zzksQrfhbsLFcJ5GaJD0xyU9ROGwFZ7dvl7Z+zI/Qn/Zf5PpUlxy5wY bO8+faJL4CmxZIfgJpAcADgax9RAkisuXhyVoU3jKKzPWNvcvPvFolBkn7+ua1YYB941 XDrVhcCEDGRz2PSSfliQBQvLeNvrbXf7TA2CxY4EGJXycCtmyxhYuQTkgv00k78x6KDZ Jv+OVeks56wS9/VLYufFbE67AHxkaXo/nMOjc+yMzGfiERNDWHzATH+DcEUoBzs0vm2i MFoQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=65Lb9qUYvL+TtRCJQNaCYe75zyZB0A/F6ddO/rGUvVs=; b=W7aJRfFIL9kkWmOfzvf2blipy74S2w+lyTo8w5Zmvldz0xbDORq880dUQts5/JrMfh VbFOCUPsC3YWbqa7EOFMeknq6ySdrFJTbxpeDuIezAqKXBDLUu64uczC5B9GjXmfCysD GyLv2+NCud7LbdEzVNYicgFhBngn/2GKJ8feeT91V3M9VuibxfY2cQ+VDoK4JdUVRW3b KTFaeshI9BDNFii4knx/DNNnw6tOLXjn22QDB/p1xBFVxTeQk4LPkgZBewcpxmVBF3Yx eBxJGm6I7gf1wW2SQbqqRpP/cWiGHfeG+hTjWqbrI/zJC0lOWI5HVjKObSgVIk6jFKfR zfhw== X-Gm-Message-State: AOAM531WkI5zdO/S67lu4KIROfEa67BXhiEyPuqNZRGNkVBAUUf8rqwf Yjn2n1MHFNd9r4IujxM+cofqncYWbAfPuz7m99g= X-Google-Smtp-Source: ABdhPJx+prB+JwxfK9FgPokdDAhqqWoWVFK/HRqfv5FRHMJYn/18hANIOuZJZB6wV8CO60y/O6o8mNdqKUidA/8fbDE= X-Received: by 2002:ac8:172e:: with SMTP id w43mr12978532qtj.8.1593571630514; Tue, 30 Jun 2020 19:47:10 -0700 (PDT) MIME-Version: 1.0 From: =?UTF-8?B?5a2Z5LiW6b6ZIHN1bnNoaWxvbmc=?= Date: Wed, 1 Jul 2020 10:46:59 +0800 Message-ID: Subject: How do you investigate the cause of total hang? Is there some information that I should pay attention to in order to get some hint? To: linux-kernel@vger.kernel.org, Kernelnewbies@kernelnewbies.org X-BeenThere: kernelnewbies@kernelnewbies.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Learn about the Linux kernel List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kernelnewbies-bounces@kernelnewbies.org Hi, list My x86 machine(linux4.19) sometimes hangs, suddenly not responding in any way to the mouse or the keyboard. How can I investigate why it hung up? Is there extra information I can find for a clue? Is there anything less drastic than power-off to get some kind of action, if only some limited shell or just beeps, but might give a clue? Thank you for your attention to this matter. _______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies