From: "H. Peter Anvin" Subject: Re: [2/4] 2.6.23-rc5: known regressions Date: Mon, 03 Sep 2007 14:08:16 +0100 Message-ID: <46DC0740.1030507@zytor.com> References: <46DBD982.3080102@googlemail.com> <46DBDD8B.7040706@googlemail.com> <20070903055114.7f82ef46.akpm@linux-foundation.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Cc: Jeff Chua , michal.k.k.piotrowski@gmail.com, torvalds@linux-foundation.org, linux-kernel@vger.kernel.org, mingo@elte.hu, lists4me@web.de, adaplas@gmail.com, lenb@kernel.org, dth@dth.net, linux-fsdevel@vger.kernel.org, nfs@lists.sourceforge.net, Trond.Myklebust@netapp.com, andrew@digital-domain.net, peter.kovar@gmail.com To: Andrew Morton Return-path: In-Reply-To: <20070903055114.7f82ef46.akpm@linux-foundation.org> Sender: linux-fsdevel-owner@vger.kernel.org List-ID: Andrew Morton wrote: >> On Mon, 3 Sep 2007 20:36:32 +0800 "Jeff Chua" wrote: >> On 9/3/07, Michal Piotrowski wrote: >> >>> Subject : console is messed up after resume from s2ram or switching to console from X >>> References : http://lkml.org/lkml/2007/8/4/6 >>> Last known good : ? >>> Submitter : Jeff Chua >>> Caused-By : ? >>> Handled-By : H. Peter Anvin >>> Antonino A. Daplas >>> Workaround : "s2ram --force --acpi_sleep 1 --vbe_mode" >>> Status : problem is being debugged >> Michal, >> >> Can you please close this case. I'm using the workaround and satisfied with it. > > 2.6.21 was OK, and 2.6.23-rc2 needed a manual workaround? > > That's a regression. Yes, it is. 2.6.21 was OK, but only within a narrow and ill-characterized set of conditions (framebuffer not compiled into the kernel, in particular.) It appears to me that the interaction between STR and video on this system is extremely fragile, to the point that any minor perturbations in the state can break it, and that that is the real underlying problem here. -hpa