From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750864AbWDEDrH (ORCPT ); Tue, 4 Apr 2006 23:47:07 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751094AbWDEDrG (ORCPT ); Tue, 4 Apr 2006 23:47:06 -0400 Received: from mga01.intel.com ([192.55.52.88]:35994 "EHLO fmsmga101-1.fm.intel.com") by vger.kernel.org with ESMTP id S1750864AbWDEDrF (ORCPT ); Tue, 4 Apr 2006 23:47:05 -0400 X-IronPort-AV: i="4.03,165,1141632000"; d="scan'208"; a="20040441:sNHT16378950" Subject: Re: 2.6.17-rc1-mm1 From: Zou Nan hai To: "Luck, Tony" Cc: Andrew Morton , LKML , linux-ia64@vger.kernel.org In-Reply-To: <20060404233851.GA6411@agluck-lia64.sc.intel.com> References: <20060404014504.564bf45a.akpm@osdl.org> <20060404233851.GA6411@agluck-lia64.sc.intel.com> Content-Type: text/plain Organization: Message-Id: <1144202706.3197.11.camel@linux-znh> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.2.2 (1.2.2-4) Date: 05 Apr 2006 10:05:06 +0800 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2006-04-05 at 07:38, Luck, Tony wrote: > On Tue, Apr 04, 2006 at 01:45:04AM -0700, Andrew Morton wrote: > > - VGA on ia64 is broken - the screen comes up blank. But ia64 otherwise > > seems to work OK. I didn't have time to investigate. > > Broken in base 2.6.17-rc1 too :-( VGA comes up and prints a > few messages, and then goes wonky and dies. Comparing > what I _think_ I saw with the dmesg output, it appears to > die here: > The wild VGA comes from the patch which changed ioremap. Now ioremap would not remap memory to region 6 unless that memory is marked as EFI_MEMORY_UC by EFI. Unfortunately on the Tiger Machine, VGA ram base was marked as EFI_MEMORY_WB instead of EFI_MEMORY_UC... So you can see the problem disappear if change VGA_MAP_MEM to use ioremap_nocache. But I am not quite sure if we can fully trust EFI on this attribute. Zou Nan hai