Re: BISECTED: 2.6.29-rc2 regression: hibernation hang on eeepc-701

Alan Jenkins wrote:
Rafael J. Wysocki wrote:
On Saturday 24 January 2009, Alan Jenkins wrote:

Rafael J. Wysocki wrote:

On Friday 23 January 2009, Alan Jenkins wrote:

Rafael J. Wysocki wrote:

On Thursday 22 January 2009, Alan Jenkins wrote:

Rafael J. Wysocki wrote:

On Thursday 22 January 2009, Alan Jenkins wrote:

Alan Jenkins wrote:

Hibernation hangs just after writing the image. With s2disk
I can see
this from the console messages. The same hang happens with
kernel
swsusp ('echo disk | sudo tee /sys/power/state'), and I can
see that
the image has been written from the HDD led.

In either case, I can still hard-power-off and resume from
hibernation.

It doesn't hang if I use the shutdown method (either 'echo
shutdown |
sudo tee /sys/power/disk' or 's2disk -P "shutdown
method=shutdown"').

I've bisected this to commit
571ff7584bb9e05fca0eb79752ae55a46faf3a98. It doesn't revert
cleanly from RC2.

I think it's distinct from the other two reported suspend
regressions. I'm not using acpi-cpufreq, and the issue doesn't
affect resume.

It looks distinct.

Do you suspend this box to RAM and does it work?

Yes, I do use STR on it occasionally, and it still works in RC2.


Please retest with the appended patch applied.

That fixes it.

OK, it won't hurt to apply it.

Still, the hardware or the BIOS in your box seems to be broken,
or both, so I'd
like to debug it a bit more if you don't mind.

Can you please test the patch below instead of the previous one?

It hangs at the same point as the unpatched RC2. As before, it
doesn't
hang if I use "shutdown" instead of "platform".

Going by sysfs, I have 4 PCI devices without a kernel driver.

8086:2592 Mobile 915 Express Graphics Controller
8086:2792 Mobile 915 Express Graphics Controller (driven by X)
8086:2448 82801 Mobile PCI Bridge
8086:2641 82801FBM (ICH6M) LPC Interface Bridge

The bridges shouldn't be affected, so I bet on the graphics.

It seems that the BIOS doesn't expect it to be in D3 while entering
S4,
although it apparently doesn't mind it to be in D3 while entering S3.

I blame the Asus BIOS writers. ;-)

Wouldn't Windows normally put it into D3?


It need not put it into D3hot if it's going to remove power from it.


There are many reports of successful hibernation under Windows on this
hardware. The motivation being that S3 drains the battery in <24
hours.
(Fewer people hibernate on linux because you only have a 4G SSD, so
a swap
partition wastes a lot of space, and most installers can't set up swap
files).

Also it sounds like it would break when the linux kernel mode
setting driver is used.


Why would it break? This is the last phase of hibernation, right before
powering off things.


If I have a kernel mode-setting driver, won't that bind to the
graphics device? Then the device would be power managed, so it would
trigger the same problem.

I guess I can test this rather than speculating. If my concern is
valid, then using intelfb should have the same effect.


Ok, it doesn't hang with intelfb (and not power managing devices without
drivers), so I guess there's nothing to worry about.

Alan
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

Relevant Pages

  • user-space hangs - followup
    ... characteristics of the problem are that all kernel threads and interrupts ... but all user-space processes appear to hang. ... I've been looking back through my driver again - a good exercise ... still calling schedule(), as I should. ...
    (comp.os.linux.development.system)
  • Kernel to non-kernel comms
    ... I'm just starting a project which is going to have a kernel level driver ... problems with it causing a kernel hang. ... any recommendations of websites or books about 'typical pitfalls' with ...
    (microsoft.public.win32.programmer.kernel)
  • Re: XPE Software Hazard
    ... If you make your image pure driver based with your custom driver doing the work then since Win2000/XP kernel itself is very nicely ... In what scenarios XPE will hang while running?? ...
    (microsoft.public.windowsxp.embedded)
  • RE: Hang with Promise Ultra100 TX2 (kernel 2.4.18)
    ... Hang with Promise Ultra100 TX2 ... I'm running promise ultra133-tx2 successfully with 2.4.22 kernel. ... Merge the promise driver from later 2.4.x kernels to 2.4.18 and recompile? ... send the line "unsubscribe linux-kernel" in ...
    (Linux-Kernel)
  • Re: 2.6.30-rc4 kernel
    ... I think there may be a problem with the 2.6.30 kernel that is ... # Generic Driver Options ... # PCI IDE chipsets support ... # Other IDE chipsets support ...
    (Linux-Kernel)