Re: Linux 3.0-rc4 intermittent failure to resume

[Brad Campbell <lists2009@fnarfbargle.com>]

On 24/06/11 10:41, Brad Campbell wrote:
> On 23/06/11 20:02, Rafael J. Wysocki wrote:
>> On Thursday, June 23, 2011, Brad Campbell wrote:
>>> G'day all,
>>>
>>> I've recently moved from tuxonice to mainline uswsusp. I'm getting intermittent failure to resume
>>> problems. No message in dmesg that I can find, it just boots clean. Is there something I can do to
>>> get some debug info on this? It's really, really annoying.
>>>
>>> About 75% of the time it works perfectly, and I can find no rhyme or reason to why it suddenly just
>>> decides to ignore the saved state.
>>>
>>> 32 bit userspace with a statically linked 64 bit s2disk, s2both&   resume. 64 bit kernel.
>> Do you use the i915 driver?
>>
> Indeed I do.
Just a follow up to this.
It looks like adding "early writeout = y" to my /etc/suspend.conf has worked around the problem.

If I had "shutdown method = reboot", then it would resume every time, but with "shutdown method = 
platform" it would fail to resume most of the time.
I'm running a Core 2 Duo with an Intel X18-M 160GB SSD on an intel AHCI controller.

Adding "early writeout = y" does not appear to change the progress statistics, or apparent speed of 
the suspend, but it has now survived 7 suspend/power off/resume cycles that it would never had 
survived before.

Odd ??