From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@freedesktop.org Subject: [Bug 56139] [bisected] kernel 3.7.0-rc1 breaks 6950 (boot/grub2 and suspend/resume) (CAYMAN) Date: Mon, 25 Feb 2013 13:57:16 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0035145733==" Return-path: Received: from culpepper.freedesktop.org (unknown [131.252.210.165]) by gabe.freedesktop.org (Postfix) with ESMTP id BD4FBE5D51 for ; Mon, 25 Feb 2013 05:57:16 -0800 (PST) In-Reply-To: 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 --===============0035145733== Content-Type: multipart/alternative; boundary="1361800636.14B8121.5728"; charset="us-ascii" --1361800636.14B8121.5728 Date: Mon, 25 Feb 2013 13:57:16 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" https://bugs.freedesktop.org/show_bug.cgi?id=56139 --- Comment #50 from Alex Deucher --- (In reply to comment #49) > What if the problem is not from this code, but underneath? I'll try to > suspend and resume without having Xorg running. Would that help in any way? If the commit you bisected is actually the culprit, this is an issue with the memory controller and the displays on the GPU. When we reprogram the memory controller we need to stop all the GPU memory clients. We used to disable the display controllers but this caused additional flicker on boot up and caused hangs on some cards. So we switched to the current method which was recommended by the hardware team. This avoids the flicker by just stopping the MC interface in the displays but leaving them enabled and also fixes hangs related to this on a number of chips. Unfortunately, it seems to cause other problems in certain causes. -- You are receiving this mail because: You are the assignee for the bug. --1361800636.14B8121.5728 Date: Mon, 25 Feb 2013 13:57:16 +0000 MIME-Version: 1.0 Content-Type: text/html; charset="UTF-8"

Comment # 50 on bug 56139 from 
(In reply to comment #49)
> What if the problem is not from this code, but underneath? I'll try to
> suspend and resume without having Xorg running. Would that help in any way?

If the commit you bisected is actually the culprit, this is an issue with the
memory controller and the displays on the GPU.  When we reprogram the memory
controller we need to stop all the GPU memory clients.  We used to disable the
display controllers but this caused additional flicker on boot up and caused
hangs on some cards.  So we switched to the current method which was
recommended by the hardware team.  This avoids the flicker by just stopping the
MC interface in the displays but leaving them enabled and also fixes hangs
related to this on a number of chips.  Unfortunately, it seems to cause other
problems in certain causes.

You are receiving this mail because:
  • You are the assignee for the bug.
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