From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from lpsc-mail.in2p3.fr (lpsc-mail.in2p3.fr [134.158.40.8]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 550ACB7D94 for ; Tue, 11 May 2010 17:07:45 +1000 (EST) Received: from LPSC0173W (lpsc0173w.in2p3.fr [134.158.40.173]) by lpsc-mail.in2p3.fr (8.13.1/8.13.1/In2p3) with SMTP id o4B6Jm6h019392 for ; Tue, 11 May 2010 08:19:49 +0200 Message-ID: <44001372909D4EAD8181655EEA5E416C@LPSC0173W> From: "Guillaume Dargaud" To: Subject: Curious serial slowdown Date: Tue, 11 May 2010 08:18:25 +0200 MIME-Version: 1.0 Content-Type: multipart/signed; protocol="application/x-pkcs7-signature"; micalg=SHA1; boundary="----=_NextPart_000_003A_01CAF0E2.87C41450" List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , This is a multi-part message in MIME format. ------=_NextPart_000_003A_01CAF0E2.87C41450 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit Hello all, I'm looking for hints on a curious problem. I have a working kernel on a custom embedded device and it works fine. We came up with a variation of the device with a few hardware changes, one of them being the number of serial ports that goes from 4 to 2. In order to save time I tried my current kernel. When I boot the custom bootlader behaves the same, then the kernel boot behaves the same, but then once usermode is reached (the message "init started: BusyBox..."), the new card console display crawls to a halt (about one character per second instead of 115000 bauds !!!). But the card goes at normal speed as an ssh connection shows. So my question is: is it caused by the fact that there are 2 missing serial ports ? Will making a new kernel with the correct hardware definition solve it ? -- Guillaume Dargaud http://www.gdargaud.net/ ------=_NextPart_000_003A_01CAF0E2.87C41450 Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIILjTCCA2Qw ggJMoAMCAQICAQAwDQYJKoZIhvcNAQEEBQAwKzELMAkGA1UEBhMCRlIxDTALBgNVBAoTBENOUlMx DTALBgNVBAMTBENOUlMwHhcNMDEwNDI3MDU0NDM2WhcNMjEwNDIyMDU0NDM2WjArMQswCQYDVQQG EwJGUjENMAsGA1UEChMEQ05SUzENMAsGA1UEAxMEQ05SUzCCASIwDQYJKoZIhvcNAQEBBQADggEP ADCCAQoCggEBAN13q/Hq/Hi1FKHcd2JWl4wvt1TCTFSm1H0iR3t0qffjrXxVshTwSF2YjwK9khG2 iE/EFfVvWFv3ibUn6q+g/KCOiIaPnyS2kE4k3GfQT49+Vi0bKAdysRdnoA7bQk7DfLQloviMBLGp gl2Mj9SDe+6qn9fS2/ZbbsKBENaaq12IHDbKBWRoS4uewFCUI/22KLWvXaTdpsXT2FcrPvi1usTY /xIiXyRpB2LkNEoId8owu+zT7XWQaKKMcXIn3hUmLCUhhCqeVxiBciO9Zh8P47e9F9oSuhlU9Bwt 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