NetBSD Problem Report #46243

From www@NetBSD.org  Thu Mar 22 10:22:45 2012
Return-Path: <www@NetBSD.org>
Received: from mail.netbsd.org (mail.netbsd.org [149.20.53.66])
	by www.NetBSD.org (Postfix) with ESMTP id E4E4E63E3D8
	for <gnats-bugs@gnats.NetBSD.org>; Thu, 22 Mar 2012 10:22:44 +0000 (UTC)
Message-Id: <20120322102244.582BC63E3D7@www.NetBSD.org>
Date: Thu, 22 Mar 2012 10:22:44 +0000 (UTC)
From: akosela@andykosela.com
Reply-To: akosela@andykosela.com
To: gnats-bugs@NetBSD.org
Subject: i386: scrollback buffer dissappears and is not consistent
X-Send-Pr-Version: www-1.0

>Number:         46243
>Category:       kern
>Synopsis:       i386: scrollback buffer dissappears and is not consistent
>Confidential:   no
>Severity:       non-critical
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Mar 22 10:25:00 +0000 2012
>Last-Modified:  Sun Mar 25 15:35:01 +0000 2012
>Originator:     Andy Kosela
>Release:        NetBSD 5.1.2
>Organization:
>Environment:
NetBSD zoltar.lan 5.1.2 NetBSD 5.1.2 (ZOLTAR) #0: Thu Mar 22 11:08:17 CET 2012  root@zoltar.lan:/usr/src/sys/arch/i386/compile/ZOLTAR i386
>Description:
Custom kernel compiled -- GENERIC with added:

options WSDISPLAY_SCROLLBACK_LINES=200

Platform: i386
Scrollback in all virtual consoles behaves very strange.  It starts with 200 lines of scrollback buffer, then after issuing a few commands at the prompt seems to get smaller and provides only 50-75 lines of scrollback buffer.  When changing virtual console to the next one it seems to dissappear entirely.

This bug is also easily reproducible on 6.0-BETA.
>How-To-Repeat:

>Fix:

>Audit-Trail:
From: Michael <macallan@netbsd.org>
To: gnats-bugs@netbsd.org
Cc: 
Subject: re: kern/46243
Date: Sat, 24 Mar 2012 17:35:27 -0400

 This sounds more like a bug in the vga driver than anything else. As  
 far as I can tell it doesn't even look at WSDISPLAY_SCROLLBACK_LINES
 ( assuming that's what you're using since you didn't include much  
 useful info )

From: Andy Kosela <akosela@andykosela.com>
To: gnats-bugs@netbsd.org
Cc: macallan@netbsd.org
Subject: Re: kern/46243
Date: Sun, 25 Mar 2012 17:34:36 +0200

 On Sat, Mar 24, 2012 at 10:40 PM, Michael <macallan@netbsd.org> wrote:
 > =A0This sounds more like a bug in the vga driver than anything else. As
 > =A0far as I can tell it doesn't even look at WSDISPLAY_SCROLLBACK_LINES
 > =A0( assuming that's what you're using since you didn't include much
 > =A0useful info )

 I'm using the standard vga text mode (80x25).  Tested it both on the
 physical i386 box and in virtualbox -- same behavior.  Can you
 elaborate more on "it doesn't even look at
 WSDISPLAY_SCROLLBACK_LINES"?  Then how to pass correctly that option
 so that it is recognized?

 I can provide you any more info you want to further debug it.  It's
 pretty easily reproducible on standard vga text mode on *any* PC
 hardware.

 --Andy

Home	PR Database Search