From mboxrd@z Thu Jan 1 00:00:00 1970 From: johnohagan Subject: Re: 3.0.0-1-rt-amd64: Suspend hangs Date: Thu, 6 Oct 2011 02:01:52 +1100 Message-ID: <20111006020152.e7b0c625e5cc4c707a601420@johnohagan.com> References: <20110930010128.ede515e66ed1a331ad625a2a@johnohagan.com> <20111003191452.GK6949@pengutronix.de> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: linux-rt-users@vger.kernel.org, Jonathan Nieder , Thomas Gleixner To: Uwe =?UTF-8?B?S2xlaW5lLUvDtm5pZw==?= Return-path: Received: from razor.vivawebhost.com ([173.237.190.106]:35059 "EHLO razor.vivawebhost.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757554Ab1JEPCB (ORCPT ); Wed, 5 Oct 2011 11:02:01 -0400 In-Reply-To: <20111003191452.GK6949@pengutronix.de> Sender: linux-rt-users-owner@vger.kernel.org List-ID: On Mon, 3 Oct 2011 21:14:52 +0200 Uwe Kleine-K=C3=B6nig wrote: > Hello John, >=20 > On Fri, Sep 30, 2011 at 01:01:28AM +1000, johnohagan wrote: > > Running Debian testing on an HP Mini 5102 with non-RT kernel, > > suspend to ram, suspend to disk and resume work as expected. With > > the RT kernels from both testing and Sid, attempting to suspend may > > result in a lock-up, with a blank screen and high fan operation. > > Keyboard and Sysrq keys are unresponsive and a hard shutdown is > > necessary. This happens randomly AFAIKT, of the order of half the > > time, possibly more often if larger programs are running, but still > > occurs in single-user mode. > >=20 > > I ran the tests using /sys/power/pm_test described here: > > https://raw.github.com/torvalds/linux/master/Documentation/power/ba= sic-pm-debugging.txt > >=20 > > The freeze occurs with pm_test set to "processors", but not with > > "platform".=20 > Can you please test the following two things: >=20 > - Can you reproduce with the kernel parameter: >=20 > maxcpus=3D1 Aha! When booted this way, I can't reproduce the problem. Suspend works= =2E > ? > - Does onlining/offlining of the 2nd cpu work reliably? That is: >=20 > echo 0 > /sys/devices/system/cpu/cpu1/online > echo 1 > /sys/devices/system/cpu/cpu1/online I can successfully execute those commands without error, but as my lapt= op has only one cpu, I'm not sure what that means. > Best regards > Uwe >=20 > --=20 > Pengutronix e.K. | Uwe > Kleine-K=C3=B6nig | Industrial Linux Solutions > | http://www.pengutronix.de/ | -- To unsubscribe from this list: send the line "unsubscribe linux-rt-user= s" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html