From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@freedesktop.org Subject: [Bug 65963] screen goes blank, Linux hangs - Radeon 7870, Gallium, Glamor Date: Sat, 30 Aug 2014 18:45:45 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0467634360==" Return-path: Received: from culpepper.freedesktop.org (unknown [131.252.210.165]) by gabe.freedesktop.org (Postfix) with ESMTP id E3C406E22C for ; Sat, 30 Aug 2014 11:45:44 -0700 (PDT) In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: dri-devel@lists.freedesktop.org List-Id: dri-devel@lists.freedesktop.org --===============0467634360== Content-Type: multipart/alternative; boundary="1409424344.fc341.31433"; charset="us-ascii" --1409424344.fc341.31433 Date: Sat, 30 Aug 2014 18:45:44 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" https://bugs.freedesktop.org/show_bug.cgi?id=65963 --- Comment #21 from paul.woegerer@gmail.com --- (In reply to comment #20) > (In reply to comment #19) > > @Damian, I had the same problems. My configuration is similar to yours: > > Radeon 7870, Linux 3.16.1, xorg 1.16, MESA 10.3 RC1 (fedora f21 branch). > > > > After consulting https://wiki.archlinux.org/index.php/ATI it tried adding > > radeon.dpm=0 to my kernel command line as a workaround. It solved the > > problem. No more lockups. The system is now stable with the above > > configuration. Clearly this has something to do with the powermanagement > > changes in MESA and the kernel (there were no lockups with earlier versions > > of MESA) > > There is no power management code in mesa. Power management is completely > self-contained in the kernel. If you are not getting lockups with dpm > enabled and an older version of mesa, it may be a mesa issue. Hmm, sounds like newer versions of MESA trigger a dormant power management issue in the radeon kernel driver (with certain Pitcairn hardware) ...just speculating. It's a while ago thus I can't tell the exact version of kernel and MESA when I first observed the behavior. All I can say for sure is that now since using radeon.dpm=0 I did not experience a single lockup anymore (which is good enough for me). Is there a way to build the radeon kernel driver with some additional debugging/logging that could help you to understand what's going on ? -- You are receiving this mail because: You are the assignee for the bug. --1409424344.fc341.31433 Date: Sat, 30 Aug 2014 18:45:44 +0000 MIME-Version: 1.0 Content-Type: text/html; charset="UTF-8"

Comment # 21 on bug 65963 from 
(In reply to comment #20)
> (In reply to comment #19)
> > @Damian, I had the same problems. My configuration is similar to yours:
> > Radeon 7870, Linux 3.16.1, xorg 1.16, MESA 10.3 RC1 (fedora f21 branch).
> > 
> > After consulting https://wiki.archlinux.org/index.php/ATI it tried adding
> > radeon.dpm=0 to my kernel command line as a workaround. It solved the
> > problem. No more lockups. The system is now stable with the above
> > configuration. Clearly this has something to do with the powermanagement
> > changes in MESA and the kernel (there were no lockups with earlier versions
> > of MESA)
> 
> There is no power management code in mesa.  Power management is completely
> self-contained in the kernel.  If you are not getting lockups with dpm
> enabled and an older version of mesa, it may be a mesa issue.

Hmm, sounds like newer versions of MESA trigger a dormant power management
issue in the radeon kernel driver (with certain Pitcairn hardware) ...just
speculating.

It's a while ago thus I can't tell the exact version of kernel and MESA when I
first observed the behavior. All I can say for sure is that now since using
radeon.dpm=0 I did not experience a single lockup anymore (which is good enough
for me).

Is there a way to build the radeon kernel driver with some additional
debugging/logging that could help you to understand what's going on ?

You are receiving this mail because:
  • You are the assignee for the bug.
--1409424344.fc341.31433-- --===============0467634360== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/dri-devel --===============0467634360==--