DazzaG

Q: 24" iMac Screen Freezes since 10.6.3 update - pls help!

I don't know if this is just coincidence or not, but since updating my iMac to 10.6.3 it keeps on crashing. On 3 separate occasions today, whilst using my Mac the screen has gone completely black with thin white lines down it.....see pic below:

http://picasaweb.google.com/lh/photo/6SYzhCgVYEU5TBKqRfOQ1Q?feat=directlink

The fans and hard disk are still running but it will not respond to any keyboard or mouse presses - I simply have to turn it off by holding the power button in.
It will then restart as usual.

Anyone got any ideas? Do you think that if I was to re-install Mac OS X from my original install disk it could solve the issue?

Thanks

Darren

24" intel imac 2.8Ghz, Mac OS X (10.6.3)

Posted on Mar 31, 2010 2:43 PM

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Q: 24" iMac Screen Freezes since 10.6.3 update - pls help!

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  • by retiarius,

    retiarius retiarius Sep 5, 2015 10:21 AM in response to DjeffreyDjevrick
    Level 1 (5 points)
    Sep 5, 2015 10:21 AM in response to DjeffreyDjevrick

    Hi, for myself (running iMac 20" with AMD2400), initially trying

    the "run-always-as-root, do-the-kext-install-dance-after-setting-kext-dev-mode=1"

    to upgrade to 10.10.5 did not work for me, but following DjeffreyDjevrick's tip

    of Aug. 14 (set kextmode as single-user) did the trick, so thanks for that!

     

    I've not been brave enough to try El Capitan yet, but perhaps this will require

    at least doing:

     

              sudo nvram boot-args="rootless=0"

     

    I've learning after many upgrades from 10.6.2 that there always seems to

    be something new required with each new release, so I am used to going

    into safe mode until I'm certain those kext's are really loaded.

  • by George2705,

    George2705 George2705 Sep 7, 2015 2:40 AM in response to DazzaG
    Level 1 (0 points)
    Sep 7, 2015 2:40 AM in response to DazzaG

    Hi Running an iMac mid 2008 with ATI 2600.

    Logging in as root user and following the instructions seems to have worked again for 10.10.5

     

    Will El Capitan run on my machine I wonder?

    It cannot be long before it falls off the support list.

  • by swmaster,

    swmaster swmaster Sep 20, 2015 2:38 AM in response to George2705
    Level 1 (0 points)
    Sep 20, 2015 2:38 AM in response to George2705

    rootless=0 and kext-dev-mode=1 are not working under El Capitan.

    you have to boot your mac into recovery mode, and disable system integrity protection there.

    otherwise no unsigned kexts may be loaded.

    instructions: http://totalspaces.binaryage.com/elcapitan

  • by Tazthed,

    Tazthed Tazthed Sep 20, 2015 4:01 AM in response to swmaster
    Level 1 (0 points)
    Sep 20, 2015 4:01 AM in response to swmaster

    Cool swmaster! So after system integrity protection has been disabled the kexts work fine under El Capitan with no freezes?

  • by swmaster,

    swmaster swmaster Sep 20, 2015 7:50 AM in response to Tazthed
    Level 1 (0 points)
    Sep 20, 2015 7:50 AM in response to Tazthed

    They ought to. Did not verify it though. I was running into the same issue (unsigned kexts fail to load) with my MBA

    running the official version of El Capitan. then i found info about rootless=0 being unsupported and thought it is

    worthwhile to share with you the only possible way to put unsigned kexts to work under El Cap.

     

    let me turn it a bit around: w/o this you have no chance to load the old ATI kexts.

    on the other hand, there may be some other issues that will keep you from using them

    successfully. I will give a try sometimes next week, and report back my findings.

  • by swmaster,

    swmaster swmaster Sep 26, 2015 1:48 PM in response to Tazthed
    Level 1 (0 points)
    Sep 26, 2015 1:48 PM in response to Tazthed

    did it. everything seems to be OK. after going into recovery mode and disabling system integrity check, one has to reboot so the changes can take place.

    my iMac booted and i saw, that in addition to the new AMDSupport/AMDFramebuffer/AMD2400Controller kexts the OS also booted ATISupport.


      70    2 0xffffff7f82556000 0x125000  0x125000  com.apple.kext.AMDSupport (1.3.6) 83090AC0-12F4-3913-875B-34864770E7AD <69 68 12 11 7 5 4 3 1>

      71    0 0xffffff7f826be000 0x183000  0x183000  com.apple.kext.AMD2400Controller (1.3.6) 7ACC06ED-1DF1-3BDD-BE0F-9868CBA5802E <70 68 12 11 5 4 3 1>

      118    0 0xffffff7f81a52000 0x230000  0x230000  com.apple.ATIRadeonX2000 (10.0.0) FC15384B-F906-3FC1-9E64-2116EBA8CF2A <68 12 7 6 5 4 3 1>

      119    0 0xffffff7f82689000 0x22000    0x22000    com.apple.kext.AMDFramebuffer (1.3.6) 062D84C5-444E-374A-A4CD-D15BF1DAC978 <70 68 12 11 7 5 4 3 1>

      121    0 0xffffff7f8293e000 0x45000    0x45000    com.apple.kext.ATISupport (6.0.6) 32B62390-C30A-56D0-16D8-3FC746B9B298 <68 12 11 7 5 4 3 1>


    as you can see, all the new AMDxxx kexts rely on AMDSupport (70) instead of ATISupport, so as usually I had to remove the AMDxxx ones. after deleting (of course i made copies before i did so) AMDSupport/AMDFramebuffer and AMD2400Controller, i had to wait for the kext caches to rebuild. Then i was able to reboot the iMac. it booted and right now it shows the usual kexts:


    com.apple.kext.ATISupport (6.0.6)

    com.apple.kext.ATI2400Controller (6.0.6)

    com.apple.ATIRadeonX2000 (10.0.0)

    com.apple.kext.ATIFramebuffer (6.0.6)


    So besides of ATIRadeonX2000 everything comes from 10.6.2.

     

    there is a small difference i noticed during the procedure. as El Capitan was booting with it's original kexts, the login screen was black. as i replaced them with the old ones, the login screen shows my desktop blurred. maybe it's just a coincidence, i'll report if i notice some more systematic behaviour on that.

     

    i had to say that i did not have freezes with the original El Capitan GM, but i was using it like for 10-15 minutes.

  • by davidefrombruino,Helpful

    davidefrombruino davidefrombruino Oct 4, 2015 11:30 PM in response to swmaster
    Level 1 (5 points)
    Oct 4, 2015 11:30 PM in response to swmaster

    Hello to all you guys.

    First of all sorry for my bad English.

    I installed El Capitan 10.11 (15A284) on my iMac mid 2007 with the ATI Radeon HD 2400 XT 128 MB,

    and found the same old problems of screen freeze, usual symptoms. So I decided to try with the dear old kext ATI.
    This is the procedure that worked for me, using EasyKext Utility and SIPUtility.app by CVAD.


    1) restarted in safe mode (cmd + r)
    2) open the terminal by entering the command csrutil disable
    3) Restart
    4) in the folder system / library / extensions eliminated

    AMD2400Controller.kext
    AMDFramebuffer.kext
    AMDSupport.kext
    by backing up first
    5) used EasyKext Utility to install

    ATI2400Controller.kext

    ATIFramebuffer.kext

    ATISupport.kext
    6) used to validate kext SipUtility kext using the first flag "CSR_ALLOW_UNTRUSTED_KEXT"
    7) restart in safe mode
    8) open the terminal by entering the command csrutil enable
    9) restart

     

    Now ATI extensions are loaded even if unknown and everything seems to work well (3 days without rebooting).
    In recent years these pages I have been very useful, I thank all those who helped, hoping to have given my small contribution

  • by aieronimo,

    aieronimo aieronimo Oct 5, 2015 2:58 AM in response to davidefrombruino
    Level 1 (0 points)
    Oct 5, 2015 2:58 AM in response to davidefrombruino

    Hi, Davide.  Thank you for the clear and detailed posting.  So if I understand correctly, you are turning off System Integrity Protection in El Capitan, then installing the old ATI kext files, then validating them through Terminal, then re-enabling System Integrity Protection.  If this is true and the System Information panel is showing these ATI extensions as actually enabled after your restart (Step 9), then this means you have found a way to install the old kexts without having to keep System Integrity Protection turned off.  If this is the case, then great news and thanks very much! - Tony

  • by davidefrombruino,

    davidefrombruino davidefrombruino Oct 5, 2015 3:38 AM in response to aieronimo
    Level 1 (5 points)
    Oct 5, 2015 3:38 AM in response to aieronimo

    Hi aieronimo,

    yes it's exactly what i did.

    Below what I got doing "csrutil status" on Terminal:

     

    Last login: Mon Oct  5 12:09:40 on console

    def:~ def1$ csrutil status

    System Integrity Protection status: enabled.

    def:~ def1$


    A screenshot of current extension
    Schermata 2015-10-05 alle 12.21.59.png

    Description


    ATIFramebuffer:

     

      Versione: 1.6.6

      Ultima modifica: 03/10/15, 10:15

      ID bundle: com.apple.kext.ATIFramebuffer

      Caricato: Sì

      Informazioni: ATIFramebuffer 1.6.6.25 (7429)

      Ottenuto da: Sconosciuta/o

      Tipo: Intel

      Architetture: i386, x86_64

      64-bit (Intel): Sì

      Posizione: /System/Library/Extensions/ATIFramebuffer.kext

      Versione kext: 6.0.6

      Indirizzo di caricamento: 18446743521840400000

      Caricabile: No

      Errori di convalida firma: Kext signature validation error code -67061

      Dipendenze: Soddisfatte

      Firmato da: Sconosciuta/o

     

    ATI2400Controller:

     

      Versione: 1.6.6

      Ultima modifica: 03/10/15, 10:15

      ID bundle: com.apple.kext.ATI2400Controller

      Caricato: Sì

      Informazioni: ATI2400Controller 1.6.6.25 (7429)

      Ottenuto da: Sconosciuta/o

      Tipo: Intel

      Architetture: i386, x86_64

      64-bit (Intel): Sì

      Posizione: /System/Library/Extensions/ATI2400Controller.kext

      Versione kext: 6.0.6

      Indirizzo di caricamento: 18446743521840500000

      Caricabile: No

      Errori di convalida firma: Kext signature validation error code -67061

      Dipendenze: Soddisfatte

      Firmato da: Sconosciuta/o

     

    ATISupport:

     

      Versione: 1.6.6

      Ultima modifica: 03/10/15, 10:15

      ID bundle: com.apple.kext.ATISupport

      Caricato: Sì

      Informazioni: ATISupport 1.6.6.25 (7429)

      Ottenuto da: Sconosciuta/o

      Tipo: Intel

      Architetture: i386, x86_64

      64-bit (Intel): Sì

      Posizione: /System/Library/Extensions/ATISupport.kext

      Versione kext: 6.0.6

      Indirizzo di caricamento: 18446743521837200000

      Caricabile: No

      Errori di convalida firma: Kext signature validation error code -67061

      Dipendenze: Soddisfatte

      Firmato da: Sconosciuta/o

     

    I hope this helps , let me know if everything works for you

  • by aieronimo,

    aieronimo aieronimo Oct 5, 2015 5:02 AM in response to davidefrombruino
    Level 1 (0 points)
    Oct 5, 2015 5:02 AM in response to davidefrombruino

    Thanks again.  I happen to speak Italian, so see that each ATI kext is loaded ("caricato").  I see, though, that each kext is not listed as loadable ("caricabile").  I assume that does not matter so long as "caricato" shows si' ("yes").

     

    When you go to System Information panel, then to Software, and then to Kexts - where it shows the master list of loaded kexts - do these three ATI kexts show as loaded?

     

    (I am not in front of my iMac at the moment, so the path above may not be exactly correct.)

     

    Thanks again. - Tony

  • by davidefrombruino,

    davidefrombruino davidefrombruino Oct 5, 2015 10:22 AM in response to aieronimo
    Level 1 (5 points)
    Oct 5, 2015 10:22 AM in response to aieronimo

    Hi Tony,

    in the System Information panel/software/extension it show caricato=si (loaded=yes) as you can see in my previous screenshot.

    It's strange  it's show "not loadable" but is loaded. Everything is ok at the moment, no more freezes since 03/10/15.

  • by aieronimo,

    aieronimo aieronimo Oct 6, 2015 4:26 AM in response to aieronimo
    Level 1 (0 points)
    Oct 6, 2015 4:26 AM in response to aieronimo

    Thanks again for this tip.  I will not be able to try it out on my system for some time, as I am checking other programs for El Capitan compatibility before installing the new OS.  (It could take several weeks....)  But I really appreciate this tip. - Tony

  • by Phil_O_,

    Phil_O_ Phil_O_ Oct 6, 2015 11:26 AM in response to aieronimo
    Level 1 (0 points)
    Oct 6, 2015 11:26 AM in response to aieronimo

    Finally did another update on my iMac 2007.  I gave up at 10.9.4  and missed out Yosemite completely.  I did the El Capitan update last night and followed the instructions posted by davidefrombruino - Oct 4, 2015 11:30 PM

     

    Everything went ok,  although my system was freezing for fun immediately after the El Cap upgrade and right through to patching the kext,  including just after I deleted the AMD Kext files but before I could install the ATI ones    so after about 6 hard shutdowns,  I finally got my system running stable with El Capitan.

     

    I had already used the SipUtility to validate the kext but on re-enabled the System Integrity Protection using "csrutil enable" and then rebooting by second monitor failed to be enabled.


    The ATI Kext were flagged as "Kext signature validation error code -67061"


    System running fine though on both monitors with SIP disabled.

  • by Tazthed,

    Tazthed Tazthed Oct 10, 2015 5:07 AM in response to davidefrombruino
    Level 1 (0 points)
    Oct 10, 2015 5:07 AM in response to davidefrombruino

    I did the El Capitan update today and followed the instructions posted by davidefrombruino, but with the ATI2600controller.kext, because I have the 24" iMac from 2008.

    So far no freezes and everything works fine. 

    Thanks for the guide davidefrombruino !


  • by rubendomfer,

    rubendomfer rubendomfer Oct 11, 2015 5:01 AM in response to davidefrombruino
    Level 1 (0 points)
    Oct 11, 2015 5:01 AM in response to davidefrombruino

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