Comment 8 for bug 904261

Have run cking's s3 test script as per https://wiki.ubuntu.com/Kernel/Reference/S3SystemTapDebug.

locatehang, run immediately after reboot (because the machine hung at a lit black screen as before), printed:

$ ./locatehang
Looking for function that matches hash from the Magic Number from the kernel log.
  Magic: 12:64:42 maps to hash: a3d2c
  Hash matches: acpi_hw_write_pm1_control() (address: 0)
The kernel probably wrote to the southbridge the magic to put the machine
into suspend or hibernate and then the machine hung. Generally this means
that the machine did not wake up and get back to the kernel resume successfully
which normally indicates a BIOS issue.

All s3-*.log files were 0 bytes in size:

$ ls -l s3*.log
-rw-r--r-- 1 root root 0 Dec 16 16:45 s3-devices.log
-rw-r--r-- 1 root root 0 Dec 16 16:45 s3-error.log
-rw-r--r-- 1 root root 0 Dec 16 16:45 s3-systemtap.log
-rw-r--r-- 1 root root 0 Dec 16 16:45 s3-tasks.log
-rw-r--r-- 1 root root 0 Dec 16 16:45 s3-test.log
-rw-r--r-- 1 root root 0 Dec 16 16:45 s3-trace.log