I can reproduce this problem on an IBM Thinkpad T40p. Following the kernel suspend debugging procedure described at https://wiki.ubuntu.com/DebuggingKernelSuspend the only entry in dmesg is
[ 6.344073] ACPI: (supports S0 S3 S4 S5)
[ 6.344126] Magic number: 0:798:917
[ 6.344128] hash matches drivers/base/power/resume.c:46
See the attached dmesg.txt for full details.
I can reproduce this problem on an IBM Thinkpad T40p. Following the kernel suspend debugging procedure described at https:/ /wiki.ubuntu. com/DebuggingKe rnelSuspend the only entry in dmesg is base/power/ resume. c:46
[ 6.344073] ACPI: (supports S0 S3 S4 S5)
[ 6.344126] Magic number: 0:798:917
[ 6.344128] hash matches drivers/
See the attached dmesg.txt for full details.