Red Hat Bugzilla – Bug 240031
hibernate and supend fails
Last modified: 2007-11-30 17:12:04 EST
Description of problem: pm-hibernate gives a message about shrinking memory, then "shutting down console(s)", and then nothing more. pm-suspend just gives a blank screen, but power stays on. In both cases I can't wake up the machine, I have to hard reset, and it goes through the full boot (starting services etc). It worked with previous kernel versions. Version-Release number of selected component (if applicable): kernel-2.6.20-1.2948.fc6 but no problem in kernel-2.6.20-1.2933.fc6 How reproducible: Always Steps to Reproduce: 1. pm-hibernate or pm-suspend Actual results: Hibernate stops at "shutting down console(s)" Expected results: It should continue with saving to disk, stop the HD and shut down power. This works fine in the earlier kernel-2.6.20-1.2933.fc6 Additional info: I can't see anything relevant in dmesg or /var/log/messages, the messages there are all about the boot process, not the shutdown. The Laptop is a Fujitsu-Siemens Amilo A1650G AMD64 processor, 1GB memory
Between 2933 and 2948, support for tickless kernel was added. It's not the only thing, but I'd consider it a possibility. Would you please try booting with nohz=off on the kernel command line?
Yes, with nohz=off it works as it should (testing with 2.6.20-1.2952.fc6). For your info, suspend and hibernate also work again in FC7 (2.6.21-1.3194.fc7) without the nohz=off option (it doesn't wake up from suspend though, but that's a different matter).
Ok. I'll close this as fixed in the current release then. Please feel free to open another bug for the other issue (if you haven't already).