This issue is still evident with kernel 2.6.28-9. I'm revisiting it although it very much appears this could be due to a confluence of unique circumstances on particular hardware.
The only reports I can identify seem to be with various Sony Vaio laptops/notebooks of differing ages and hardware. One was found to be a "...pcmcia express card reader disconnecting itself after suspend and thus triggering the wakeup". http://marc.info/?l=linux-acpi&m=118250426218485&w=2 I've used up all the user-space options for disabling wakeup events through /sys/devices/*/wakeup without solving it. What is interesting is it affects Windows XP too. It doesn't seem to affect all models since it doesn't affect an identical Vaio. I re-discovered an email I sent in 2007 in response to David Brownell on the linux-acpi mailing list: http://marc.info/?l=linux-acpi&m=118539846819353&w=2 "I'm not sure if this might inform your thinking here but today I've just tracked down a similar issue on another Sony Vaio (PCG-SRX51) where S3 STR immediately wakes. I enabled ACPI_FUTURE_USAGE and called acpi_get_event_status() immediately upon resume (before the wake flag is cleared) and iterated each wake event. I discovered that the PM timer event is the reason the system resumes but so far haven't discovered why. I have a tenuous theory it could be related to the kernel timer using the ACPI PM Timer. I tried disabling that with the boot parameter 'nopmtimer' but that didn't help. To test this I'm currently building a kernel that disables the PM Timer wake event during suspend and re-enables it on resume, something the ACPI specification hints at in section 4.7.2.1. I'm not sure if this problem occurs on a wider range of systems than the Sony since at present, without a debug kernel with ACPI_FUTURE_USAGE and specific additional checks, there is no way to know the reason a system resumed." ** Changed in: linux (Ubuntu) Importance: Undecided => Low Assignee: (unassigned) => TJ (intuitivenipple) Status: New => Confirmed -- Resume immediately after Suspend due to some WAKE event https://bugs.launchpad.net/bugs/128315 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
