[UnaClocker]

Outstanding! Thanks for sharing that awesome tip. Very useful.

[bmaltais]

Originally Posted by UnaClocker

Outstanding! Thanks for sharing that awesome tip. Very useful.

I was hoping a similar trick would fix the Audio problem after sleep but no luck so far.

[UnaClocker]

Yeah, we've tried manually loading and unloading that kext.. It's a very odd bug that is keeping the audio off after sleep.

[km9]

Originally Posted by Type11

fgodfrey and km9,

I checked in my initial work on power management. I think it is real close but does not appear to work right now. I am going to busy the next couple days so I thought I would get it in and you can look it at. It doesn't break anything else.

I have modified the code so that it will work correctly (the point was not to try to unload the driver, but only to reinitialize the SD card slot upon resume).

The remaining problem is to notify the OS when a user exchanges the SD card to a different one during sleep (I have already added necessary code for detection). IMHO the notification is mandatory, since if not implemented, would lead to silent data corruption on the exchanged card.

[bmaltais]

Originally Posted by km9

I have modified the code so that it will work correctly (the point was not to try to unload the driver, but only to reinitialize the SD card slot upon resume).

The remaining problem is to notify the OS when a user exchanges the SD card to a different one during sleep (I have already added necessary code for detection). IMHO the notification is mandatory, since if not implemented, would lead to silent data corruption on the exchanged card.

I can live with that risk as I never change SD card during sleep. Could it be made available as a separate build in a different download location so only users that understand the risk can get it? This would spare the umount of the disk before sleep and all the nasty side effect of sleeping Applications running off the SDHC card...

I can certainly accept the risk of corrupting my card to get a fully functioning sleep resistant SDHC card kernel extension.

[Type11]

km9, ok I see I have not looked at the code so on resume do you just do a cardinit? that was what I was going to try next.

So I see the detect function, I assume we could just add it to the call back first before the card init right?

cheers

[km9]

Attached kext is an updated version of the SD card slot driver with sleep support. Please note that if you eject media before unmounting it from Mac OS X (whether while in sleep or not), the SD card slot will become unusable until next reboot.

Originally Posted by Type11

km9, ok I see I have not looked at the code so on resume do you just do a cardinit? that was what I was going to try next.

So I see the detect function, I assume we could just add it to the call back first before the card init right?

cheers

Yes, it basically doing a cardInit. While it is easy to detect card changes, the problem is how to notify the OS of the card removal. Since the changeMediaState function is not called by the driver while a card is mounted, there is no way to notify the OS of unexpected card removal unless we switch to push model for handling state changes (using the message function).

Current version (the kext and the source code on sf.net) marks the card slot as 'not present' when it detects card removal (or when it detects that a card has been swapped to another). If the OS (IOBlockDeviceDriver) could poll media state while the card is mounted, everything should work fine, however...

[fgodfrey]

km9 - That is probably good enough for now. I'd thought of the card swap problem awhile back but since forgotten it. Glad you thought of it again! (Silent data corruption is *not* a good thing!)
I won't have time to do a release of it until tomorrow evening, but maybe Type11 can if he gets to it before then. I'd call this one Release Candidate 1.

[bmaltais]

km9, great work! I can finally sleep the mini and wakeup and SDHC still work! I vote for the integretion in the current 7.5 beta.

[A305]

WOW! I take a month vacation and come back to see a working SD Card (also after sleep) and sleep working on Dell HD to boot! Amazing work people! Now to wipe the drive and help out with the beta testing...