Re: suspending to disk on FC6 not working

[Pavel Machek <pavel@ucw.cz>]

On Tue 2006-09-26 19:09:01, Louis Garcia wrote:
> On Wed, 2006-09-27 at 00:58 +0200, Pavel Machek wrote:
> > On Wed 2006-09-27 00:54:13, Rafael J. Wysocki wrote:
> > > On Wednesday, 27 September 2006 00:45, Pavel Machek wrote:
> > > > On Tue 2006-09-26 18:39:13, Louis Garcia wrote:
> > > > > On Wed, 2006-09-27 at 00:26 +0200, Rafael J. Wysocki wrote:
> > > > > > On Wednesday, 27 September 2006 00:15, Pavel Machek wrote:
> > > > > > > Hi!
> > > > > > > 
> > > > > > > > > > Please boot the kernel with "2" appended to the command line, so the system
> > > > > > > > > > goes to the 2nd runlevel (ie. without network servers and X).  Then log in
> > > > > > > > > > as root, do "echo 8 > /proc/sys/kernel/printk" and
> > > > > > > > > > "echo disk > /sys/power/state".  The system should suspend to disk and power
> > > > > > > > > > off the machine.  If it doesn't do that (ie. if it returns to the shell
> > > > > > > > > > immediately), please do "dmesg > dmesg.log" and send the dmesg.log file
> > > > > > > > > > to me.
> > > > > > > > > 
> > > > > > > > > The system didn't power off, it returned to the shell. I attached dmesg.
> > > > > > > > 
> > > > > > > > Thanks.
> > > > > > > > 
> > > > > > > > Pavel, it looks like we have a problem with the CPU suspend on this box:
> > > > > > > > 
> > > > > > > > acpi acpi: freeze
> > > > > > > > PM: snapshotting memory.
> > > > > > > > Class driver suspend failed for cpu0
> > > > > > > > Could not power down device &q->lock: error -22
> > > > > > > > Some devices failed to power down, aborting suspend
> > > > > > > > acpi acpi: resuming
> > > > > > > 
> > > > > > > That looks like cpufreq/acpi, no?
> > > > > > > 
> > > > > > > Can we get bugzilla.kernel.org report?
> > > > > > 
> > > > > > Ah, it may be the same bug as http://bugzilla.kernel.org/show_bug.cgi?id=7188
> > > > > > 
> > > > > > > Can you try without acpi processor and cpufreq?
> > > > > > 
> > > > > > First, please try to remove the acpi_cpufreq module before the suspend.
> > > > > > 
> > > > > > Greetings,
> > > > > > Rafael
> > > > > 
> > > > > Yep sure is. I removed the acpi_cpufreq module and my box suspended and
> > > > > resumed nicely, from gnome even.
> > > > > 
> > > > > This has not been working since 2.6.17. Something in cpufreq in the
> > > > > 2.6.18pre series broke.
> > > > 
> > > > bugzilla time, cc dave jones and acpi people.
> > > 
> > > We _already_ _have_ a bugzilla entry for that (please see above).
> > 
> > Sorry.
> > 
> > > Louis, could you please add a "me too" to the bugzilla entry at the above
> > > address?
> > 
> > Also state that it worked okay in 2.6.17...
> > 
> > ...hmm, and at this point you should be able to git bisect...
> > 
> > ...or perhaps it is easier to add printks into acpi_cpufreq and find
> > _why_ its class suspend fails?
> 
> Sorry this is beyond my abilities. If you can provide a patch with the
> necessary printks I can recompile and test.

Okay, I guess that's "git bisect" for you, then. There are good
descriptions how to do it on the net ;-).
								Pavel
-- 
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