Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161029AbVKPXwf (ORCPT ); Wed, 16 Nov 2005 18:52:35 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1161030AbVKPXwf (ORCPT ); Wed, 16 Nov 2005 18:52:35 -0500 Received: from mailfe04.tele2.fr ([212.247.154.108]:7379 "EHLO swip.net") by vger.kernel.org with ESMTP id S1161029AbVKPXwe (ORCPT ); Wed, 16 Nov 2005 18:52:34 -0500 X-T2-Posting-ID: dCnToGxhL58ot4EWY8b+QGwMembwLoz1X2yB7MdtIiA= Date: Thu, 17 Nov 2005 00:52:16 +0100 From: Samuel Thibault To: Jason Dravet Cc: 7eggert@gmx.de, adaplas@gmail.com, torvalds@osdl.org, akpm@osdl.org, davej@redhat.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH] vgacon: Workaround for resize bug in some chipsets Message-ID: <20051116235216.GB7573@bouh.residence.ens-lyon.fr> Mail-Followup-To: Samuel Thibault , Jason Dravet , 7eggert@gmx.de, adaplas@gmail.com, torvalds@osdl.org, akpm@osdl.org, davej@redhat.com, linux-kernel@vger.kernel.org References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.9i-nntp Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1021 Lines: 33 Hi, The following patch should correct the issue: When doublescan mode is in use, scanlines must be doubled. Signed-off-by: Samuel Thibault --- drivers/video/console/vgacon.c.orig 2005-11-17 00:40:02.000000000 +0100 +++ drivers/video/console/vgacon.c 2005-11-17 00:42:27.000000000 +0100 @@ -502,10 +502,16 @@ { unsigned long flags; unsigned int scanlines = height * c->vc_font.height; - u8 scanlines_lo, r7, vsync_end, mode; + u8 scanlines_lo, r7, vsync_end, mode, max_scan; spin_lock_irqsave(&vga_lock, flags); + outb_p(VGA_CRTC_MAX_SCAN, vga_video_port_reg); + max_scan = inb_p(vga_video_port_val); + + if (max_scan & 0x80) + scanlines <<= 1; + outb_p(VGA_CRTC_MODE, vga_video_port_reg); mode = inb_p(vga_video_port_val); - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/