Bug 13781

Created attachment 22361 [details]
lspci for 2.6.31-rc3

Created attachment 22362 [details]
lsusb for 2.6.31-rc3

Created attachment 22363 [details]
syslog errors at resume

seems to be a lock problem that cause the freeze.

Hi, Christian
    From the log in comment #3 it seems that there exists the following warning message in course of hibernation.
    >WARNING: at drivers/base/sys.c:411 sysdev_suspend+0x1f7/0x2b0()
Jul 15 20:13:03 athor kernel: Hardware name: Aspire 1510
Jul 15 20:13:03 athor kernel: Interrupts enabled after cpufreq_suspend+0x0/0x110
    >WARNING: at drivers/base/sys.c:475 sysdev_resume+0x9f/0xb0()
Jul 15 20:13:03 athor kernel: Hardware name: Aspire 1510
Jul 15 20:13:03 athor kernel: Interrupts enabled while resuming system devices

    Will you please confirm whether the issue is S3 or hibernation?
   
    Thanks.

I still do not know exactly the difference between S3 and hibernation.
The laptop is suspended with the following script:

        # Stops network:
        /etc/rc.d/rc.inet1 eth1_stop

        # Flush all data to disk (just in case)
        LD_PRELOAD="" sync

        # Save the system time
        hwclock --systohc --utc

        # Suspend
        echo -n mem > /sys/power/state

        # 2.6.25 does not send lid event at resume:
        rm -rf /var/state/hibernating

        # Restore the system time
        hwclock --hctosys --utc

        # Reset the graphic card
        vbetool post

So it's basically a suspend to ram for me...

Hi, Christian
    Will you please try the debug patch in http://bugzilla.kernel.org/show_bug.cgi?id=13269#C8 and attach the output of dmesg after suspend/resume?
    Thanks.

Created attachment 22463 [details]
Add the suspend/resume flag to aovid smp call in course of cpufreq_suspend/resume

Will you please try the attached debug patch and see whether the issue still exist?
   Thanks.

Created attachment 22476 [details]
dmesg for 2.6.31+proposed fix after resume

Here is the dmesg output after suspend/resume.
The kernel was patched with both patches (printk debug patches + your proposed patch to avoid smp in suspend/resume - btw my kernel is not smp enabled, but preempt enabled), and it seems to resume correctly now. Without it, it would block on a black screen, so the proposed patch improves if not fixes the problem.

Hope this dmesg output will help you to analyze/confirm.

Thanks

Btw, I've also new critical errors at resume
(maybe not the same problem, but as it's the same context, I report here)

Message from syslogd@athor at Thu Jul 23 19:39:43 2009 ...
athor kernel: Uhhuh. NMI received for unknown reason a0 on CPU 0.

Message from syslogd@athor at Thu Jul 23 19:39:43 2009 ...
athor kernel: Dazed and confused, but trying to continue

Message from syslogd@athor at Thu Jul 23 19:39:43 2009 ...
athor kernel: You have some hardware problem, likely on the PCI bus.

This is also a new problem, that didn't exist with 2.6.30 kernels.

Otherwise, the system works after that.

Hi, Christian
    Thanks for the test.
    It seems that it can be resumed correctly now. And OS won't complain the following warning message after applying the patch.
    >WARNING: at drivers/base/sys.c:411 sysdev_suspend+0x1f7/0x2b0()
Jul 15 20:13:03 athor kernel: Hardware name: Aspire 1510
Jul 15 20:13:03 athor kernel: Interrupts enabled after
cpufreq_suspend+0x0/0x110
    >WARNING: at drivers/base/sys.c:475 sysdev_resume+0x9f/0xb0()
Jul 15 20:13:03 athor kernel: Hardware name: Aspire 1510
Jul 15 20:13:03 athor kernel: Interrupts enabled while resuming system devices

    So this bug will be marked as resolved. And I will try to push the patch in comment #7.
    thanks.

On Tuesday 28 July 2009, Christian Casteyde wrote:
> Still present in rc4, but a patch is pending for inclusion.
>
> Le dimanche 26 juillet 2009, vous avez écrit :
> > This message has been generated automatically as a part of a report
> > of recent regressions.
> > 
> > The following bug entry is on the current list of known regressions
> > from 2.6.30.  Please verify if it still should be listed and let me know
> > (either way).
> > 
> > 
> > Bug-Entry   : http://bugzilla.kernel.org/show_bug.cgi?id=13781
> > Subject             : System freeze at resume after suspend to RAM
> > Submitter   : Christian Casteyde <casteyde.christian@free.fr>
> > Date                : 2009-07-15 18:42 (12 days old)

Handled-By : Zhao Yakui <yakui.zhao@intel.com>
Patch : http://bugzilla.kernel.org/attachment.cgi?id=22463

Should be fixed by http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=4bc5d34135039566b8d6efa2de7515b2be505da8 .

Please reopen in case it's not fixed.