Date: Mon, 7 Dec 2015 09:18:15 -0500 From: Alexander Kabaev <kabaev@gmail.com> To: FreeBSD Current <freebsd-current@freebsd.org> Cc: Rick Macklem <rmacklem@uoguelph.ca> 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>
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--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 <rmacklem@uoguelph.ca> 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 <file>", 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--
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