Reported by Vladimir Zidar, Jul 27, 2011
IOHibernateImageHeader is different in Lion, wakeup from sleep image is not working anymore.
Comment 1 by Vladimir Zidar, Jul 27, 2011
In fact, there is another problem - 'Secure Virtual Memory' is on by default in Lion. There is no gui option to turn it off.
Comment 2 by Vladimir Zidar, Jul 27, 2011
/Library/Preferences/com.apple.virtualMemory.plist: <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> <dict> <key>DisableEncryptedSwap</key> <true/> </dict> </plist>
Comment 3 by Jose Alves, Aug 19, 2011
even disabling secure virtual memory, hibernate does not work. I tried with: hibernatemode 25 and (Wake=Yes/ForceWake=Yes) the same result: Read HFS+ file: [hd(0,3)/private/var/vm/sleepimage] 512 bytes. header read size 200 Incorrect image signature Loading Darwin 10.7
Comment 4 by Vladimir Zidar, Aug 19, 2011
In order for hibernate to work, Chameleon needs to be compiled with 10.7 IOHibernateImageHeader. If interested, I can provide patch later today.
Comment 5 by Jose Alves, Aug 19, 2011
yes, thanks. I am willing to test
Comment 6 by Vladimir Zidar, Aug 20, 2011
Jose, please try this one. I works for me, and it should also be able to work with 10.5/10.6.
Comment 7 by Cosmosis Jones, Aug 20, 2011
why do u have to add the checkOsVersion?? I'm pretty sure that already exists
Comment 8 by Vladimir Zidar, Aug 20, 2011
Jones, First of all, I forgot to mention that this is test patch, not intended to be a proper solution. I dislike resume.c very much, and if this works for people, I'll clean up resume.c completely and submit proper patch. Therefore, I didn't want to change too many files, and considering checkOSVersion() was defined in boot.c only, and not mentioned in any header file, I did consider it private to boot.c. Proper solution would move checkOSVersion() to library, presumably the same one where gMacOSVersion is defined. But first thing first, let's verify this works for everybody else.
Comment 9 by Jose Alves, Aug 21, 2011
Hi Vladimir Perfect with secure virtual memory disabled $ sysctl vm.swapusage vm.swapusage: total = 64.00M used = 0.00M free = 64.00M hibernatemode 25 my kernel.log attached
Comment 11 by Cyrus The Great, Aug 22, 2011
i test it. and can confirm that it work.
Comment 12 by goten goten0, Aug 26, 2011
hi, i've the same problem with hibernation. it doesn't work and at boot i get incorrect image signature. is there a way to disable virtual secure memory in lion? i've downloaded the patch by vladimir zidar but i don't know how to use that file. anyone can help me? thanks
Comment 13 by Carlos Rodríguez, Sep 3, 2011
I also get the "header read size 200. Incorrect image signature" message. I'm using the 1493 build of Chameleon. I can wake from sleep properly but not from deep sleep (hibernate). I think chameleon is not even reading the whole sleep file because it only reads 512 bytes and obviously is way too large. Cheers!
Comment 14 by Moik The, Dec 26, 2011
*Bump* Are there already attempts to merge this into trunk? Are there any blockers that need to be resolved?
Comment 15 by Moik The, Jan 22, 2012
*Bump* How complicated would it be to pull openssl into the boot loader in order to decrypt the pages encrypted in the swapfile (i got a working userspace implementation doing that)?
Comment 16 by Vladimir Zidar, Jan 22, 2012
@Michael I guess decryption itself wouldn't be too hard, but how would you guess out the key?
Comment 17 by Moik The, Jan 24, 2012
Hm. I see where you are going. Under 10.6 keys were still stored in the sleepfiles header. Under Lion keys get stored directly to nvram (have a look at IOHibernateIO.cpp; xnu-1699.24.8). Afaik FakeSMC is injecting stuff so that nvram is able to read stuff. Maybe it's possible to patch it in a way to store the nvram permanently to disk. Eventually that's too much effort considering it works after turning of encryption ...
Comment 18 by Vladimir Zidar, Jan 24, 2012
@Michael Additionally, dumping 16GB of ram into sleepimage every time it goes to sleep takes too much time. Also due to special access mode during writing, all the fans in the box spin like crazy - which is really annoying. What I'd like to find out is how to support deepsleepdelay option in pmset. I'd be ok with going first to standby mode, and then after predefined period (presumably when I am already sleeping) it would write the sleepimage (without waking me up). Anyway, neither of which has to do with original issue here..
Comment 19 by Cosmosis Jones, May 5, 2012