From owner-freebsd-current@freebsd.org Mon Dec 7 14:18:22 2015 Return-Path: Delivered-To: freebsd-current@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 58A259B710B for ; Mon, 7 Dec 2015 14:18:22 +0000 (UTC) (envelope-from kabaev@gmail.com) Received: from mail-qg0-x233.google.com (mail-qg0-x233.google.com [IPv6:2607:f8b0:400d:c04::233]) (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 18FCB19FA for ; Mon, 7 Dec 2015 14:18:22 +0000 (UTC) (envelope-from kabaev@gmail.com) Received: by qgea14 with SMTP id a14so143752517qge.0 for ; Mon, 07 Dec 2015 06:18:21 -0800 (PST) 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 :mime-version:content-type; bh=Em4x5Y/QnoObsNpk/FPDb16Sd6pqlRARlVM43ReaLYs=; b=rGK8DJvZYqCPeeFlv5qnpp++ybfutIYexe8sCWlwJOn5ClSobkLxJKNTjceZ/TFLfz 3JOPWYqmT8P8gAazyJnFvu2c4X3FETOoo40nM0iZg65dToX1f+DtVoeAi9R8ANFR4mGX fvuzJoqT0LEvWoGgwCycsH/gCeUTePqoPyD48dOrK9Zusbx84RfAdTraJ7jafbXK+H2h M2cAYWpRznec75pfVzd4P7GOAJfgJeEAo7Jg/OgNtZDiEh4QHc8IY1S7whqoMm4Aq8R/ Ng++eNP9QtA/+mKZYSpzLdOx7s3gpHtG3yHheQlUoz2v8zj2cunmSNjWfTP3NIHBMqix 8eUg== X-Received: by 10.140.23.83 with SMTP id 77mr36183486qgo.58.1449497901286; Mon, 07 Dec 2015 06:18:21 -0800 (PST) Received: from kan ([2601:18f:802:4680:226:18ff:fe00:232e]) by smtp.gmail.com with ESMTPSA id b108sm11646797qgf.20.2015.12.07.06.18.20 (version=TLSv1/SSLv3 cipher=OTHER); Mon, 07 Dec 2015 06:18:20 -0800 (PST) Date: Mon, 7 Dec 2015 09:18:15 -0500 From: Alexander Kabaev To: FreeBSD Current Cc: Rick Macklem Subject: Re: slow screen updates on laptop console (i386) Message-ID: <20151207091815.16e11a13@kan> In-Reply-To: <900422043.121631608.1449496955386.JavaMail.zimbra@uoguelph.ca> References: <900422043.121631608.1449496955386.JavaMail.zimbra@uoguelph.ca> X-Mailer: Claws Mail 3.13.0 (GTK+ 2.24.28; amd64-portbld-freebsd11.0) MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; boundary="Sig_/.IAaOqOvyaq1OWjKN_Ci73t"; protocol="application/pgp-signature" X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 07 Dec 2015 14:18:22 -0000 --Sig_/.IAaOqOvyaq1OWjKN_Ci73t Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Mon, 7 Dec 2015 09:02:35 -0500 (EST) Rick Macklem wrote: > Hi, >=20 > When running FreeBSD-current on an old i386 laptop, the console > screen is intermittently slow to display output. The hesitations > can be several seconds. > Sometimes it shows up when I'm typing such that it takes seconds > for the characters to echo. > I think it is the display/output side, since I've seen it happen when > doing "more ", where the screen is stuck half way through > displaying the page for a few seconds. >=20 > I don't see any problem when going into the machine remotely and > I don't see the problem on the other laptop I have running > FreeBSD/amd64. >=20 > It has been happening for a while. It occurs on the oldest kernel > I have lying around (r287930, Sep. 17, 2015). >=20 > I've tried the old "sc" driver and it seems to happen less with it, > but it still occurs. >=20 > I'll admit I have no idea what drives doing output for the display > screen. >=20 > Anyone have ideas w.r.t. this? >=20 > Thanks in advance, rick Hi, maybe a stretch, but I would try selecting different eventtimer, if available. Say, I had to select HPET on my old i7 920 to make timeouts run reliably. sysctl kern.eventtimer.timer=3DHPET =20 --=20 Alexander Kabaev --Sig_/.IAaOqOvyaq1OWjKN_Ci73t Content-Type: application/pgp-signature Content-Description: OpenPGP digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQJ8BAEBCgBmBQJWZZUnXxSAAAAAAC4AKGlzc3Vlci1mcHJAbm90YXRpb25zLm9w ZW5wZ3AuZmlmdGhob3JzZW1hbi5uZXRDNUY3RDk5NTk5QjY0MUUxM0M1MTU2OTEw NzEzMjI5OTkyNzkyRTdFAAoJEAcTIpmSeS5+s78P/0j1V52UVyidKGs0G7IkZRAj KPNiwSW8T6T2afPlAlJ+lGwMkqzpW2Ek+TrYRv0KqkrjeFCIhgEJFyGJhgSjlbPy 1uhx7uL8oq4NN73rdzq7CVOmboYZY2zUcZ5Y3dqEE25+32p8j7SH15CdTxtzWceH Svdt1xqlLa4Imzj7bvwJeeqxvGQDnfyp+6WUNjuJiI9ukBgMV7o+gVWTl2lKJPKS nQ5TdlRmDOWI8KbKMJFK6wSGV+Xa7qCR/vfkBI29y4k2UnfrCa0udkZVvADS4YmE +WdTG24Y88KmaLZCirsQ4HsfBgV2X4r/PrH7YhxzD0zX3kcQ93cmMkSPluBaGpQc p5vAsu36AXKlTU/QHLUN8DxriGFk1AOUxTpFNpqExDc2n0lpKQ/RN1EZAF0UaSwM TvR7vY/gSYkP62GBf2ln8+KpI4/vDf8s4hipC03qcAr4kNqdrmTv5eIbqmbdaty7 H2m1WDiaRUlRU3+kL4ugKUZ/TFhEE5PEuD4llXF1hGmqTvUNiJeY0aBkmbKSiC0p ZKjMui/ldUpnirVc8sirpFq9tCtkL2ND+IuQSk+i0L5oXbp5wLGogU/SmthzcdEl eeZSnhf/Gb3qadrhJGwU0PJ51X+tXWDsgubs2LvWCVXScpYaGlcz9Kl1s+2z9ca/ CYxEe/4Rh2e5X6LzOz3K =fw4E -----END PGP SIGNATURE----- --Sig_/.IAaOqOvyaq1OWjKN_Ci73t--