From owner-freebsd-x11@freebsd.org Fri Jul 1 11:03:30 2016 Return-Path: Delivered-To: freebsd-x11@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id BB36CB8E58B for ; Fri, 1 Jul 2016 11:03:30 +0000 (UTC) (envelope-from gljennjohn@gmail.com) Received: from mail-wm0-x22d.google.com (mail-wm0-x22d.google.com [IPv6:2a00:1450:400c:c09::22d]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4FC19246C for ; Fri, 1 Jul 2016 11:03:30 +0000 (UTC) (envelope-from gljennjohn@gmail.com) Received: by mail-wm0-x22d.google.com with SMTP id f126so21839568wma.1 for ; Fri, 01 Jul 2016 04:03:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=date:from:to:cc:subject:message-id:in-reply-to:references:reply-to :mime-version:content-transfer-encoding; bh=iMqt+Z6hcKYHqXap2dLCiabhkvWe2YPMXfy7EhKkwjs=; b=WbTJxEpjvstQytSyzLHd8wZnCVt/AKWUeMInrqSNDUvp+RHkLb8dM8rs7ImuRUQMIE rA0dYJKXYl6SdkAnajHB6diomh7o/xc7th3ypJuWJCi/85qZznis6+bGuzz5IVxH+Jc1 5zYgF9z9h2a4mPsn2gvcDwmtV2vx6DaQS5g2MhJQSTcsE+3m9qgjzaUhh4Pv+F9jgwvA 4zoYFq6yDKYqeOpexBrnZlZcgkyYSI+M8S490mlC4HiwCMiCCUQO2RX9+qF7DRJ7qR3H uAzLa4+/CQL1fIroZOuSlmB1w5XexmRxUjknXXJwtqZA1GTiap3Sxb1cMK8GQVw4+ITD hdkg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:date:from:to:cc:subject:message-id:in-reply-to :references:reply-to:mime-version:content-transfer-encoding; bh=iMqt+Z6hcKYHqXap2dLCiabhkvWe2YPMXfy7EhKkwjs=; b=OYQjeNGM0UFLbcfjUZSRNJ4aw49ahP3WrRh0FgJQmUB9GKjK3s8WtWfBl5+cX56rxq oxBT16YK2+yEeFYW7RyBQpvR2zc0E+ay1Z5W+qPhTzfN+iBcPT747XvUcfPE8e5THuV9 +MrKVTM294tZeN9wPnxAN4KykFtljCOIUp4i181+RA+54cjr80vopbdLRKVcH9iKT1ob ey+6CaKg6/sOSN1PJ78PEqT0U4sLk+hMeJEHKd9jHua5ntwTqaaQcOlmU2bMX5vNKvkl tjNRiJQjoF8BMTAGyWxJ/4pB5ElejAgTVbx3jyY7/KLoDEiGp3fkQwM1XSnhjGJAANas q3iQ== X-Gm-Message-State: ALyK8tIc6KtjDx8GYD5UthwgppEYE8CiR+d/n044NLL3we+Df7Q/lRiA4wEsM/mRg82AHQ== X-Received: by 10.28.176.129 with SMTP id z123mr30146305wme.99.1467371008673; Fri, 01 Jul 2016 04:03:28 -0700 (PDT) Received: from ernst.home (p578E20D8.dip0.t-ipconnect.de. [87.142.32.216]) by smtp.gmail.com with ESMTPSA id v70sm112822wmf.18.2016.07.01.04.03.26 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 01 Jul 2016 04:03:27 -0700 (PDT) Date: Fri, 1 Jul 2016 12:53:03 +0200 From: Gary Jennejohn To: Pete Wright Cc: freebsd-x11@freebsd.org Subject: Re: Debugging System Lockup Message-ID: <20160701125303.35f2c59a@ernst.home> In-Reply-To: <2893a3f4-7c49-85a0-1dd1-6c61e337c0db@nomadlogic.org> References: <2893a3f4-7c49-85a0-1dd1-6c61e337c0db@nomadlogic.org> Reply-To: gljennjohn@gmail.com X-Mailer: Claws Mail 3.13.2 (GTK+ 2.24.29; amd64-portbld-freebsd11.0) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-x11@freebsd.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: X11 on FreeBSD -- maintaining and support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 01 Jul 2016 11:03:30 -0000 On Thu, 30 Jun 2016 16:02:30 -0700 Pete Wright wrote: > Hi All, > I've been working with mmacy on testing the new i915kms support on > skylake. I've got a stubborn bug where I am able to trigger a hard-lock > of my system requiring a manual power-off/power-on to get it back in > working order. Unfortunately, I have not been able to get any debugging > information out of this system when this happens - no core, backtrace in > dmesg buffer, etc. > > I was hoping someone on this list has had experience in debugging > situations like this and could offer some tips for trying to get useful > info out of this crash. I was going to configure my system to use > dcons(4) - but this system does not have a fireware device, so that > seems to rule out that avenue. So any input would be really appreciated! > Serial console? Should even work well enough using a FTDI adapter. -- Gary Jennejohn