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, 11 Mar 2013 04:41:03 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0459218542==" Return-path: Received: from culpepper.freedesktop.org (unknown [131.252.210.165]) by gabe.freedesktop.org (Postfix) with ESMTP id A0364E60E1 for ; Sun, 10 Mar 2013 21:41:03 -0700 (PDT) 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 --===============0459218542== Content-Type: multipart/alternative; boundary="1362976863.81e41.19720"; charset="us-ascii" --1362976863.81e41.19720 Date: Mon, 11 Mar 2013 04:41:03 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" https://bugs.freedesktop.org/show_bug.cgi?id=56139 --- Comment #51 from Alexandre Demers --- (In reply to comment #50) > (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. Since I had just installed kernel 3.9.0-rc2, I tried a suspend and resume cycle. As expected, it end up frozen (I saw some text from the console, Xorg/Gnome tried to display something, couldn't, reset, couldn't, reset and froze). I then rebooted and limited the runlevel to 2 (no Xorg in the way). >>From the command line, I launched a pm-suspend. Once I woke up my computer, everything was responsive as expected. Does it help in anyway? -- You are receiving this mail because: You are the assignee for the bug. --1362976863.81e41.19720 Date: Mon, 11 Mar 2013 04:41:03 +0000 MIME-Version: 1.0 Content-Type: text/html; charset="UTF-8"

Comment # 51 on bug 56139 from 
(In reply to comment #50)
> (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.

Since I had just installed kernel 3.9.0-rc2, I tried a suspend and resume
cycle. As expected, it end up frozen (I saw some text from the console,
Xorg/Gnome tried to display something, couldn't, reset, couldn't, reset and
froze). I then rebooted and limited the runlevel to 2 (no Xorg in the way).
>>From the command line, I launched a pm-suspend. Once I woke up my computer,
everything was responsive as expected. Does it help in anyway?

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