https://bugzilla.kernel.org/show_bug.cgi?id=59401
Summary: Atom-based machine resumes immediately from S3 suspend
Product: ACPI
Version: 2.5
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: high
Priority: P1
Component: Power-Sleep-Wake
AssignedTo: [email protected]
ReportedBy: [email protected]
Regression: No
We are working on an Intel Atom-based embedded PC and have to make
suspend-to-RAM work but can't seem to succeed.
The symptom is that quite often, the machine resumes immediately after
pm-suspend. Sometimes more than 20 times out of 50 attempts.
We tried 3.7.10, 3.9.4, 3.10-rc[234] and the linux-next branch from the
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git
repository.
The attached dmesg is from linux-pm/linux-next (commit
01adc9fcbd94b71f69681913baed802f94e2f293) plus the latest drm-fixes patchset
posted by Dave Airlie in http://marc.info/?l=linux-kernel&m=137049641300788&w=2
after I have disabled wakeup devices via sysfs files:
# find /sys -name "wakeup" | while read i ; do \
DEV="$i" ; ENAB="`cat $i`" ; \
if [ "$ENAB" = "enabled" ]; then \
echo disabling $DEV ; \
echo "disabled" >$DEV ; \
fi ; \
done
However, the attached dmesg still has:
pcieport 0000:00:1c.1: System wakeup enabled by ACPI
This device is disabled by default in
/sys/devices/pci0000\:00/0000\:00\:1c.1/power/wakeup so I have tried explicitly
enabling then disabling it. Still, the next suspend resulted in an immediate
resume.
We have cross-checked suspend-resume using Windows XP and Windows 7
and these OSs are able to properly suspend the machine 50 times out of
50 attempts with Intel's official driver for the GMA3150.
How can I make S3 suspend work reliably? Is there a missing piece from our
kernel .config?
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