Hello Venki, On Fri, Apr 4, 2008 at 6:01 AM, Pallipadi, Venkatesh<venkatesh.pallipadi@xxxxxxxxx> wrote:>>>> >-----Original Message-----> >From: Thomas Renninger [mailto:trenn@xxxxxxx]> >Sent: Thursday, April 03, 2008 2:05 PM> >To: Sanjeev Aditya Naga> >Cc: Andrew Morton; linux-kernel@xxxxxxxxxxxxxxx;> >linux-acpi@xxxxxxxxxxxxxxx; Pallipadi, Venkatesh; Li, Shaohua> >Subject: Re: [>=2.6.23][BUG] Oops on power disconnection> >> >> >On Thu, 2008-04-03 at 21:45 +0530, Sanjeev Aditya Naga wrote:> >> Hello Thomas,> >>> >> On Wed, Apr 2, 2008 at 11:42 PM, Thomas Renninger> ><trenn@xxxxxxx> wrote:> >> >> >> > On Wed, 2008-04-02 at 21:43 +0530, Sanjeev Aditya Naga wrote:> >> > > Hello Thomas,> >> > >> >> > > > Hi,> >> > > >> >> > > >> >> > > > On Wed, 2008-04-02 at 18:38 +0530, Sanjeev Aditya Naga wrote:> >> > > > > Hello Andrew Morton,> >> > > > >> >> > > > > Greetings!> >> > > > >> >> > > > > Thank you for the update. Is there anything I can do> >> > > > > from my side?> >> > > > >> >> > > > > I thought it was a acpi (dsdt) problem. And based on> >> > > > > a tutorial, I have tried to extract, fix,> >recompile the dsdt> >> > > > > and use it with the kernel. But still I have the> >same problem.> >> > > > > Let me know if I shall attach the dsdt (original)> >decompiled> >> > > > > code, if that helps.> >> > > >> >> > > > this could be due a general memory corruption> >problem through ACPICA.> >> > > > If you get different backtraces on reboots even you> >only modified things> >> > > > that do not have to do with the problem, it's> >probably that and related> >> > > > to:> >> > > > http://bugzilla.kernel.org/show_bug.cgi?id=10339> >> > > >> >> > > > You might want to try the latest kernel or the patch> >posted there.> >> > >> >> > > Thank you for the update.> >> > > I have checked the bug and unfortunately its not the> >> > > same issue. Things work absolutely fine, when I'm> >> > > running on AC power. It even displays the exact> >> > > battery (and charging) status to me. It messes up> >> > > when suddenly AC power gets disconnected and> >> > > switches to battery mode (The time when I get Oops).> >> > > The system is still usable after switching to battery> >> > > mode and I still get correct battery stats until its> >> > > completely discharged. However most of the commands> >> > > like kill, poweroff, java doesn't work after the Oops.> >> > The bug is not related to battery, but to AML parsing and> >can therefore> >> > affect anything which is ACPI related.> >> >> >> >> >> > > BTW there is one similarity with the referenced bug.> >> > > If I boot the computer without AC Power, it gives the> >> > > same Oops and stops during booting itself.> >> > >> >> > > I shall try the latest kernel once and shall update you.> >> > That would be great.> >> > If it works, please give the patch there a try, IMO this> >one should see> >> > 2.6.2[34].X stable kernels soon.> >>> >> I have got the lastest kernel 2.6.25-rc8 today. I observed that> >> the referenced patch is already in the kernel. However this didn't> >> solve the problem in question. I get the same Oops on this kernel> >> as well. Find the latest dmesg along with the Oops:> >Ok.> >Maybe best is you document the backtraces/oopses with kernel> >versions at> >bugzilla.kernel.org and add dmesg and acpidump.> >It seems your machine notifies OS that the C-state table changed.> >AFAIK this is rare and there might be a general bug in the> >cpuidle layer> >which I do not know well.> >Best you add Venkatesh and Shaohua Li <shaohua.li@xxxxxxxxx> to CC of> >the bug.> >While the backtrace shows a lot, cpuidle IMO is missing a general debug> >option like in the cpufreq layer.> >I couldn't find a single printk in the whole cpuidle/{cpuidle,sysfs}.c> >files, even on error paths. Also in the cpuidle specific parts of> >drivers/acpi/processor_idle.c some debug printks may help for> >future bug> >reports. It is very hard to guess what happened...> >>> This looks like cpuidle and kobject interaction.> The latest oops looks different from the original one. Latest one is a> warn_on in lib/kref.c:43>> We (Me or Shaohua) will take a deeper look at get back on this. Thank you for the update. Let me know if I can be of any help! Kind Regards,Sanjeev >> Thanks,> Venki>>��.n��������+%������w��{.n�����{�����ܨ}���Ơz�j:+v�����w����ޙ��&�)ߡ�a����z�ޗ���ݢj��w�f
