Mountain Lion Slower Boot Times?

[EddyMac]

Tells the bootloader to load an installed SSDT.aml from your /Extra Folder.

View attachment 29600

OK I added that about the SSDT and it didn't speed up the boot time, and actually lowered my Geekbench score by about 200 points, so I removed it again.

Thanks for all your help.

 

[karacho]

OK I added that about the SSDT and it didn't speed up the boot time, and actually lowered my Geekbench score by about 200 points, so I removed it again.

Thanks for all your help.

It's not for speedup the boottime Mate, the installed SSDT.aml in /Extra is for proper speedstepping and is part of Multibeast

 

[jmpa]

You simply don't load the kexts from the Cache in /S/L/C/c/S but at boottime from /S/L/E, and with an SSD it's not significant slower. You can try also to boot with "UseKernelCache=yes" again in boot.plist and additional add "debug=8 ahcidisk=1" to the kernel flags. For me, with my 6850 GPU my boot.plist looks like that...

Try it and compare the boottime w/o UseKernelCache and with UseKernelCache+debug=8 ahcidisk=1

Thanks, works great!

But my sony optical drive eject button and dvd player stills not work. How can I solve it?

 

[jstornatore]

Anyone have issues with external hard drives not mounting / mounting slowly? Tried hooking up an external USB hard drive and an external hard drive via FW and they rarely if all mount. Sometimes the USB external mounts but it takes over a minute.

 

[contax]

I just solved this problem with my Pioneer ATA DVD RW not showing in ML using this kext

Original post here:
http://www.tonymacx86.com/mountain-...61488-no-internal-ata-bus-jmicron-solved.html

hope, it will work for you also

 

[jaydilla31]

Hi,
i also have problems with slow boot in ML. It takes around 35 sec. till i get to the desktop. I'm using a corsair ssd.


It hangs right there

Also tried this "debug=8 ahcidisk=1", but didn't do anything.

Thx

edit:

I tried the method with replacing the AppleAHCIPort.kext and the IOAHCIFamily.kext with the ones from Lion and it works great. 7 or 8 sec. till desktop . I also updated to 10.8.1, but did that before i replaced the kexts. Everything works great now except that i lost my trim-support propably thru updating to 10.8.1

 

[publishdan]

When I first installed Mountain Lion, I noticed a quicker boot than I had on Lion, but only at first....

On Lion I would see about 27 spins on the spinner under the mac logo.

Mountain Lion reduced that to 13 spins!

Somewhere in one of the updates, either 10.8.1 or 10.8.2, my boot time in Mountain Lion increased to 43 spins!

I've noticed different threads about all this and THIS IS THE ONE THAT WORKED
http://www.tonymacx86.com/mountain-lion-desktop-support/61654-mountain-lion-slower-boot-times-5.html


My system now boots Mountain Lion in 13 spins again!!!

The original post is on page 5 haha one page back

You simply don't load the kexts from the Cache in /S/L/C/c/S but at boottime from /S/L/E, and with an SSD it's not significant slower. You can try also to boot with "UseKernelCache=yes" again in boot.plist and additional add "debug=8 ahcidisk=1" to the kernel flags. For me, with my 6850 GPU my boot.plist looks like that...



Try it and compare the boottime w/o UseKernelCache and with UseKernelCache+debug=8 ahcidisk=1

i5 2500K 3.3 gHz / GA-z68xp-ud3 / 500 GB 7200 rpm HD / 16 GB RipJawz 1600 mHz

 

[moodogg7]

that was a bad ideal... I tried that without looking further down and got a kp during bootup.... Install 10.8.2 from a clean unibeast install using the removal of ati6000 kext method.....
Had to reinstall because i didnt back up the ML kexts I replaced...
boot time on SSD take 40-60 seconds in ML...... use to take 8-10 in lion

I may try the same method again this time using kext beast and rebuilding my cahes

 

[moodogg7]

I did try replacing the( IOAHCIFamily and AppleAHCIPort kexts ) in Mountain Lion {/System/Library/Extensions to Mountain Lion /System/Library/Extensions} with Lion's Legacy kexts.. This time I was careful to back up both kexts and use kext-beast to do the rollback.... the modification improved boot times dramatically.. I went from 20-30 seconds of boot-times back to the original 8-10 I had in Lion. I also took screenshots of the two different kexts and their differences to see if anyone can answer as to why these kexts are effecting the boot times on a OCZ vertex 3 ssd and are there any others who were having similar issues

on the Left you see the legacy Lion Kexts and Right is Mountain Lion Kexts

on the Left you see the legacy Lion Kexts and Right is Mountain Lion Kexts

The (legacy) Lion Kext is twice as big with more files yet allows my ssd to boot much quicker

 

[konsti]

karacho thank you for your input, I would like to confirm that the kernel flags you've posted have indeed for some curious reason speeded up my boot i.e. brought it back to original speeds (with UseKernelCache=Yes of course)

I have the Gigabyte GA-H61N-USB3 and originally, with only the OCZ Agility 3 on-board, it would boot very fast. Once I've hooked up a Seagate Greet 1,5TB, the boot is delayed by 10-15 seconds more. Adding the flags "debug=8 ahcidisk=1" brought back the initial boot speed:

<key>Kernel Flags</key>
<string>-v darkwake=0 debug=8 ahcidisk=1</string>

However, I removed debug=8 and only left ahcidisk=1 believing it was an option, it didn't work. The flags are both needed.

Can anyone shed some light on this and perhaps educate me as to what these do? I obviously do see more debug info while booting; just wondering how this fixes the any AHCI issue and what the debug does...

Cheers again. Grateful. No need to patch AHCI kexts or use Lion's.