From owner-freebsd-stable@FreeBSD.ORG Tue Dec 24 15:11:39 2013 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 5F484DF7 for ; Tue, 24 Dec 2013 15:11:39 +0000 (UTC) Received: from mail.ijs.si (mail.ijs.si [IPv6:2001:1470:ff80::25]) by mx1.freebsd.org (Postfix) with ESMTP id 1019C17B9 for ; Tue, 24 Dec 2013 15:11:38 +0000 (UTC) Received: from amavis-proxy-ori.ijs.si (localhost [IPv6:::1]) by mail.ijs.si (Postfix) with ESMTP id 3dpgr8738NzGN52 for ; Tue, 24 Dec 2013 16:11:36 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ijs.si; h= message-id:content-transfer-encoding:content-type:content-type :mime-version:in-reply-to:references:user-agent:date:date :subject:subject:organization:from:from:received:received :received; s=jakla2; t=1387897895; x=1390489896; bh=HospjZT2hWSU prQ4uicqNg0szQkg54ZXCUeIkDBcUSI=; b=F7gkGZOd+IoNskuhV6MKCjiYH/OT UV3ZMmtz1Y529Q1qsPvKP2Ca1MD15Ak8oYylgswtf0j2ioM83qXmC4GLrvkDi2ed GEjAwoauo60Rykk5v/s0DcOZ+GfhwTloxLZQlhIGi5vcWQT1+E2R6xlktXCTvwZX d0nfnZGGw0Unh1o= X-Virus-Scanned: amavisd-new at ijs.si Received: from mail.ijs.si ([IPv6:::1]) by amavis-proxy-ori.ijs.si (mail.ijs.si [IPv6:::1]) (amavisd-new, port 10012) with ESMTP id Kro0ktk3U4Tm for ; Tue, 24 Dec 2013 16:11:35 +0100 (CET) Received: from mildred.ijs.si (mailbox.ijs.si [IPv6:2001:1470:ff80::143:1]) by mail.ijs.si (Postfix) with ESMTP for ; Tue, 24 Dec 2013 16:11:34 +0100 (CET) Received: from neli.ijs.si (neli.ijs.si [IPv6:2001:1470:ff80:88:21c:c0ff:feb1:8c91]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mildred.ijs.si (Postfix) with ESMTPSA id C2FD397D for ; Tue, 24 Dec 2013 16:11:34 +0100 (CET) From: Mark Martinec Organization: J. Stefan Institute To: FreeBSD Stable Mailing List Subject: Re: Graphical console in stable/10 stuck on heavy writing Date: Tue, 24 Dec 2013 16:11:33 +0100 User-Agent: KMail/1.13.7 (FreeBSD/9.2-STABLE; KDE/4.10.5; amd64; ; ) References: <52B78808.1090802@ijs.si> In-Reply-To: MIME-Version: 1.0 Content-Type: Text/Plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Message-Id: <201312241611.33886.Mark.Martinec+freebsd@ijs.si> X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 24 Dec 2013 15:11:39 -0000 Adrian Chadd writes: > I see this when the kernel is outputting debugging .. the console can > quickly lock up exactly how you describe. I've never figured out why > though. :( Thanks for confirming. I opened a PR misc/185156 http://www.freebsd.org/cgi/query-pr.cgi?pr=185156 Mark > On 22 December 2013 16:47, Mark Martinec wrote: > > FreeBSD amd64, recent stable/10: > > > > When running some task on a graphical console window > > and that task writes lots of output to a console, the > > console gets stuck after some time (like 20 minutes), > > output stops, keyboard appears unresponsive, alt-ctrl-Fn > > is unable to switch consoles - but the machine seems > > otherwise sane: I can log in over ssh, file system and > > processes are healthy, CPU not busy. > > > > This was first noticed trying to rebuild kde from > > ports in a console window. Same happened when bulk > > updating packages from a remote site and the pkg update > > was busily writing its output to a console. > > > > The same heavy tasks (e.g. ports rebuild) can run > > just fine in an ssh session, or in a konsole / xterm. > > > > As a final proof, I tried a perl one-liner which > > writes a line (a count and some text) ten times per > > second: it manages to screw up the console window > > in about 6 minutes. > > > > Interestingly, while the console output is stuck > > and I blindly type a command on a keyboard (no echo), > > then run a shutdown from another (ssh) session, > > the console output gets unstuck during shutdown, > > rapidly displays the missing lines, including the > > echo of a command typed blindly previously, along > > with its output. > > > > Btw, this never happened on this machine while it was > > running 9.2 or older versions. > > > > Anybody seen this or can reproduce it? > > Mark