From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f49.google.com (mail-pa0-f49.google.com [209.85.220.49]) by kanga.kvack.org (Postfix) with ESMTP id 657166B0005 for ; Tue, 9 Feb 2016 15:20:17 -0500 (EST) Received: by mail-pa0-f49.google.com with SMTP id ho8so96506345pac.2 for ; Tue, 09 Feb 2016 12:20:17 -0800 (PST) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org. [140.211.169.12]) by mx.google.com with ESMTPS id y4si29318646par.45.2016.02.09.12.20.16 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 09 Feb 2016 12:20:16 -0800 (PST) Date: Tue, 9 Feb 2016 12:20:15 -0800 From: Andrew Morton Subject: Re: [Bug 112211] New: ATI Radeon Graphics not rendering correctly Message-Id: <20160209122015.71a63bd2d7ee34599fb79e9e@linux-foundation.org> In-Reply-To: References: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: smf.linux@ntlworld.com Cc: bugzilla-daemon@bugzilla.kernel.org, Dan Williams , linux-mm@kvack.org (switched to email. Please respond via emailed reply-to-all, not via the bugzilla web interface). On Tue, 09 Feb 2016 08:41:39 +0000 bugzilla-daemon@bugzilla.kernel.org wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=112211 > > Bug ID: 112211 > Summary: ATI Radeon Graphics not rendering correctly > Product: Memory Management > Version: 2.5 > Kernel Version: Linux 4.5-rc3 > Hardware: IA-32 > OS: Linux > Tree: Mainline > Status: NEW > Severity: normal > Priority: P1 > Component: Page Allocator > Assignee: akpm@linux-foundation.org > Reporter: smf.linux@ntlworld.com > Regression: No > > On testing linux 4.5-rc( 1,2 and 3) I have found that my display is not > rendered correctly on starting the X server. My screen is mainly black with > portions of the desktop appearing from time to time. I initially raised this > with the DRM/Radeon team: > > https://bugs.freedesktop.org/show_bug.cgi?id=93998 > > On investigation a bisect identified the following commit as the source of my > problem: > > 01c8f1c44b83a0825b573e7c723b033cece37b86 is the first bad commit > commit 01c8f1c44b83a0825b573e7c723b033cece37b86 > Author: Dan Williams > Date: Fri Jan 15 16:56:40 2016 -0800 > > mm, dax, gpu: convert vm_insert_mixed to pfn_t > > Convert the raw unsigned long 'pfn' argument to pfn_t for the purpose of > evaluating the PFN_MAP and PFN_DEV flags. When both are set it triggers > _PAGE_DEVMAP to be set in the resulting pte. > > There are no functional changes to the gpu drivers as a result of this > conversion. > > Signed-off-by: Dan Williams > Cc: Dave Hansen > Cc: David Airlie > Signed-off-by: Andrew Morton > Signed-off-by: Linus Torvalds > > The problem is present on two AMD/ATI systems I have tried but is absent from > my Intel based laptop. All my systems are 32 bit LFS builds. > > I did try to contact Dan Williams but I am not sure that my e-mail got through, > can anyone suggest a way forward please ? > Does your kernel include commit 03fc2da63b9a33dce784a2075c7e068bb97cbf69 Author: Dan Williams Date: Tue Jan 26 09:48:05 2016 -0800 mm: fix pfn_t to page conversion in vm_insert_mixed -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org