From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@freedesktop.org
Subject: [Bug 29726] New: New CRTC ID query breaks Radeon DRM in Zaphod mode
Date: Sat, 21 Aug 2010 08:36:54 -0700 (PDT)
Message-ID:
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Return-path:
Received: from annarchy.freedesktop.org (annarchy.freedesktop.org
[131.252.210.176])
by gabe.freedesktop.org (Postfix) with ESMTP id 518C49E9BB
for ;
Sat, 21 Aug 2010 08:36:54 -0700 (PDT)
List-Unsubscribe: ,
List-Archive:
List-Post:
List-Help:
List-Subscribe: ,
Sender: dri-devel-bounces+sf-dri-devel=m.gmane.org@lists.freedesktop.org
Errors-To: dri-devel-bounces+sf-dri-devel=m.gmane.org@lists.freedesktop.org
To: dri-devel@lists.freedesktop.org
List-Id: dri-devel@lists.freedesktop.org
https://bugs.freedesktop.org/show_bug.cgi?id=29726
Summary: New CRTC ID query breaks Radeon DRM in Zaphod mode
Product: DRI
Version: unspecified
Platform: x86-64 (AMD64)
OS/Version: Linux (All)
Status: NEW
Severity: normal
Priority: medium
Component: DRM/Radeon
AssignedTo: dri-devel@lists.freedesktop.org
ReportedBy: chewi@aura-online.co.uk
Created an attachment (id=38044)
--> (https://bugs.freedesktop.org/attachment.cgi?id=38044)
Patch against 2.6.35.3 to remove the offending code
Since upgrading from 2.6.34, programs such as Neverball and MythTV have only
updated the screen while moving the mouse or pressing keys. I managed to bisect
the kernel back to the infamous commit
bc35afdb182d4c48c889fe27ba7a5d7ea0c8194d, along with its related fix
0baf2d8fe43fdd81faa30e65ff71785c99c78520. These add support for querying the
hardware CRTC ID. I knew straight away that this was probably related to me
using Zaphod mode and a test with a single screen did indeed make the problem
go away. There was still the occasional flicker though, which may or may not be
related. I don't get any flickering with the code removed (see attached patch)
while using Zaphod mode.
I knew it was probably related to Zaphod mode because I know that the CRTCs
play a key role there but beyond that, I'm not sure what the problem is. I
don't know exactly what this code is used for.
I probably should have tested two screens without Zaphod mode but my wife will
kill me if I restart the machine again. ;) I'm guessing that isn't affected
because it's a very common setup.
--
Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.