Problema iMac Intel - 2006, si blocca!!

[St.Greg]

Ciao a tutti. Premetto che ho già cercato ma non ho trovato nulla di utile o abbastanza simile al mio caso!
Dunque, 7-8 mesi fa sono cominciati i problemi: improvvisamente, iMac si blocca senza alcuna spiegazione plausibile, senza lasciarmi fare niente, freeze completo del Desktop. Se prima lo faceva abbastanza raramente, ha cominciato a farlo sempre di più.
Ho provato molte 'soluzioni': riparato permessi, eliminato programmi inutili che potevano creare conflitti con altre, 'pulito' con Onyx, svuotato da roba inutile. Ebbene niente. Poi ho provato a sostituire la RAM, da 2 slot originari da 512 MB l'uno sono arrivato a montarne 2 da 1 GB ciascuno. Niente. iMac si blocca. Quindi ho controllato le temperature, ma tutto normale. Poi ho fatto il test Hardware, nessun problema riscontrato. Così ho inizializzato il tutto, quasi convinto di risolvere: installato Snow Leopard avevo un iMac nuovo dal punto di vista Software.. Dopo 10 minuti che utilizzavo Safari, PAFF! BLOCCATO. A volte si blocca anche 10-15 volte al giorno. È INCREDIBILE!
Vi posto un log di un blocco:

Interval Since Last Panic Report: 95548 sec
Panics Since Last Report: 1
Anonymous UUID: BE6BB7E8-0BC0-4988-B7F8-18E680787F9A

Sun Oct 31 18:08:49 2010
panic(cpu 1 caller 0x2a8ab2): Kernel trap at 0x00bf6717, type 14=page fault, registers:
CR0: 0x8001003b, CR2: 0x0000057b, CR3: 0x00101000, CR4: 0x000006e0
EAX: 0x06eafa00, EBX: 0xffffffff, ECX: 0x06eafa00, EDX: 0x06eaa800
CR2: 0x0000057b, EBP: 0x3602bae8, ESI: 0x0c879280, EDI: 0x00000006
EFL: 0x00010202, EIP: 0x00bf6717, CS: 0x00000004, DS: 0x0022000c
Error code: 0x00000000

Backtrace (CPU 1), Frame : Return Address (4 potential args on stack)
0x3602b958 : 0x21b455 (0x5cf328 0x3602b98c 0x2238b1 0x0)
0x3602b9a8 : 0x2a8ab2 (0x591664 0xbf6717 0xe 0x59182e)
0x3602ba88 : 0x29e9a8 (0x3602ba9c 0x3602bae8 0xbf6717 0xe)
0x3602ba94 : 0xbf6717 (0xe 0x48 0xc 0x3602000c)
0x3602bae8 : 0xbea173 (0x6eafa00 0x1769fcfc 0x5dd 0xc879280)
0x3602bb48 : 0xbec3f7 (0x4c19000 0x1769fcfc 0x5dd 0xc879280)
0x3602bb88 : 0xcd30f3 (0x4c19000 0xc879280 0x0 0x0)
0x3602bbc8 : 0xce561b (0x4c19000 0x3602bbe9 0x7 0x220570)
0x3602bbf8 : 0xce5bea (0x4c19000 0x29 0x0 0x0)
0x3602bc58 : 0xcad2a5 (0x4c19000 0x5bb9408 0xf 0x4fc1e6)
0x3602bc98 : 0xcad319 (0x6c09800 0xf 0x5bb9408 0x5bb9400)
0x3602bcb8 : 0xca8b4e (0x6c09800 0x5bb9404 0xf 0x0)
0x3602bce8 : 0xcaa626 (0x5725a00 0x41 0xf 0x5bb9404)
0x3602bd28 : 0xca05b5 (0x5725a00 0xd624f80 0x17 0x2265b1)
0x3602be78 : 0xc91a47 (0x4f92200 0xd624f80 0x17 0x17)
0x3602bea8 : 0xc919dc (0x4f92200 0xd624f80 0x17 0x14565)
0x3602bec8 : 0xc99e5b (0x4f92200 0xd624f80 0x17 0x14565)
0x3602bf08 : 0xcbc31b (0x4f92200 0xc919aa 0xd624f80 0x17)
0x3602bf38 : 0xcbc6bb (0x4f6c800 0x4fb2500 0x3602bf88 0x22695f)
0x3602bf58 : 0xcbc39a (0x4f6c800 0x4fb2500 0x3602bf78 0x2a1591)
0x3602bf78 : 0x22fb84 (0x4fb2500 0x0 0x3602bfc8 0x227803)
0x3602bfc8 : 0x29e6cc (0x863ea0 0x0 0x246 0x572307c)
Kernel Extensions in backtrace (with dependencies):
com.apple.driver.AppleBluetoothMultitouch(51.2)@0x ce3000->0xcebfff
dependency: com.apple.driver.IOBluetoothHIDDriver(2.3.3f8)@0xc cd000
dependency: com.apple.iokit.IOBluetoothFamily(2.3.3f8)@0xc9000 0
dependency: com.apple.iokit.IOHIDFamily(1.6.4)@0xbe6000
dependency: com.apple.driver.AppleMultitouchDriver(204.13)@0xc da000
com.apple.driver.IOBluetoothHIDDriver(2.3.3f8)@0xc cd000->0xcd9fff
dependency: com.apple.iokit.IOBluetoothFamily(2.3.3f8)@0xc9000 0
dependency: com.apple.iokit.IOHIDFamily(1.6.4)@0xbe6000
com.apple.iokit.IOBluetoothFamily(2.3.3f8)@0xc9000 0->0xcccfff
com.apple.iokit.IOHIDFamily(1.6.4)@0xbe6000->0xc21fff

BSD process name corresponding to current thread: kernel_task

Mac OS version:
10F569

Kernel version:
Darwin Kernel Version 10.4.0: Fri Apr 23 18:28:53 PDT 2010; root:xnu-1504.7.4~1/RELEASE_I386
System model name: iMac4,1 (Mac-F42787C8)

System uptime in nanoseconds: 6447139038275
unloaded kexts:
com.apple.driver.AppleFileSystemDriver 2.0 (addr 0xd77000, size 0x12288) - last unloaded 95971503316
loaded kexts:
org.virtualbox.kext.VBoxNetFlt 2.0.2
org.virtualbox.kext.VBoxUSB 2.0.2
org.virtualbox.kext.VBoxDrv 2.0.2
com.apple.filesystems.afpfs 9.7 - last loaded 3641360919134
com.apple.nke.asp_tcp 5.0
com.apple.driver.AppleBluetoothMultitouch 51.2
com.apple.filesystems.autofs 2.1.0
com.apple.driver.IOBluetoothBNEPDriver 2.3.3f8
com.apple.driver.AppleHWSensor 1.9.3d0
com.apple.driver.AppleHDA 1.8.7f1
com.apple.driver.AppleUpstreamUserClient 3.3.2
com.apple.driver.AudioAUUC 1.4
com.apple.kext.ATIFramebuffer 6.1.6
com.apple.Dont_Steal_Mac_OS_X 7.0.0
com.apple.driver.AudioIPCDriver 1.1.2
com.apple.driver.AppleLPC 1.4.12
com.apple.driver.AppleIntelYonahProfile 14
com.apple.driver.ACPI_SMC_PlatformPlugin 4.1.2b1
com.apple.ATIRadeonX1000 6.1.6
com.apple.driver.AppleBacklight 170.0.24
com.apple.driver.AppleIRController 303.8
com.apple.iokit.SCSITaskUserClient 2.6.5
com.apple.driver.AppleFWOHCI 4.7.1
com.apple.BootCache 31
com.apple.AppleFSCompression.AppleFSCompressionTyp eZlib 1.0.0d1
com.apple.driver.AirPortBrcm43xx 423.91.27
com.apple.iokit.IOAHCIBlockStorage 1.6.2
com.apple.iokit.AppleYukon2 3.1.14b1
com.apple.driver.AppleUSBHub 4.0.0
com.apple.driver.AppleAHCIPort 2.1.2
com.apple.driver.AppleIntelPIIXATA 2.5.1
com.apple.driver.AppleUSBEHCI 4.0.2
com.apple.driver.AppleUSBUHCI 4.0.2
com.apple.driver.AppleEFINVRAM 1.3.0
com.apple.driver.AppleRTC 1.3.1
com.apple.driver.AppleHPET 1.5
com.apple.driver.AppleACPIButtons 1.3.2
com.apple.driver.AppleSMBIOS 1.6
com.apple.driver.AppleACPIEC 1.3.2
com.apple.driver.AppleAPIC 1.4
com.apple.driver.AppleIntelCPUPowerManagementClien t 105.10.0
com.apple.security.sandbox 0
com.apple.security.quarantine 0
com.apple.nke.applicationfirewall 2.1.11
com.apple.driver.AppleIntelCPUPowerManagement 105.10.0
com.apple.driver.AppleMultitouchDriver 204.13
com.apple.driver.IOBluetoothHIDDriver 2.3.3f8
com.apple.driver.DspFuncLib 1.8.7f1
com.apple.driver.AppleProfileReadCounterAction 17
com.apple.driver.AppleProfileTimestampAction 10
com.apple.driver.AppleProfileThreadInfoAction 14
com.apple.driver.AppleProfileRegisterStateAction 10
com.apple.driver.AppleProfileKEventAction 10
com.apple.driver.AppleProfileCallstackAction 20
com.apple.iokit.IOFireWireIP 2.0.3
com.apple.iokit.IOSurface 74.0
com.apple.iokit.IOBluetoothSerialManager 2.3.3f8
com.apple.iokit.IOSerialFamily 10.0.3
com.apple.iokit.IOAudioFamily 1.7.6fc2
com.apple.kext.OSvKernDSPLib 1.3
com.apple.driver.AppleHDAController 1.8.7f1
com.apple.iokit.IOHDAFamily 1.8.7f1
com.apple.iokit.AppleProfileFamily 41
com.apple.driver.IOPlatformPluginFamily 4.1.2b1
com.apple.driver.AppleSMC 3.0.1d2
com.apple.iokit.IONDRVSupport 2.1
com.apple.kext.ATI1600Controller 6.1.6
com.apple.kext.ATISupport 6.1.6
com.apple.iokit.IOGraphicsFamily 2.1
com.apple.driver.CSRUSBBluetoothHCIController 2.3.3f8
com.apple.driver.AppleUSBBluetoothHCIController 2.3.3f8
com.apple.iokit.IOBluetoothFamily 2.3.3f8
com.apple.driver.AppleUSBMergeNub 4.0.0
com.apple.iokit.IOUSBHIDDriver 4.0.2
com.apple.driver.AppleUSBComposite 3.9.0
com.apple.iokit.IOSCSIMultimediaCommandsDevice 2.6.5
com.apple.iokit.IOBDStorageFamily 1.6
com.apple.iokit.IODVDStorageFamily 1.6
com.apple.iokit.IOCDStorageFamily 1.6
com.apple.iokit.IOATAPIProtocolTransport 2.5.1
com.apple.iokit.IOSCSIArchitectureModelFamily 2.6.5
com.apple.iokit.IOFireWireFamily 4.2.6
com.apple.iokit.IO80211Family 311.1
com.apple.driver.XsanFilter 402.1
com.apple.iokit.IONetworkingFamily 1.9
com.apple.iokit.IOUSBUserClient 4.0.0
com.apple.iokit.IOAHCIFamily 2.0.4
com.apple.iokit.IOATAFamily 2.5.1
com.apple.iokit.IOUSBFamily 4.0.2
com.apple.driver.AppleEFIRuntime 1.3.0
com.apple.iokit.IOHIDFamily 1.6.4
com.apple.iokit.IOSMBusFamily 1.1
com.apple.kext.AppleMatch 1.0.0d1
com.apple.security.TMSafetyNet 6
com.apple.driver.DiskImages 283
com.apple.iokit.IOStorageFamily 1.6.1
com.apple.driver.AppleACPIPlatform 1.3.2
com.apple.iokit.IOACPIFamily 1.3.0
com.apple.iokit.IOPCIFamily 2.6
Model: iMac4,1, BootROM IM41.0055.B08, 2 processors, Intel Core Duo, 2 GHz, 2 GB, SMC 1.1f5
Graphics: ATI Radeon X1600, ATY,RadeonX1600, PCIe, 128 MB
Memory Module: global_name
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x89), Broadcom BCM43xx 1.0 (5.10.91.27)
Bluetooth: Version 2.3.3f8, 2 service, 19 devices, 1 incoming serial ports
Network Service: AirPort, AirPort, en1
Serial ATA Device: WDC WD2500JS-40NGB2, 232,89 GB
Parallel ATA Device: MATSHITADVD-R UJ-846
USB Device: Built-in iSight, 0x05ac (Apple Inc.), 0x8501, 0xfd400000
USB Device: Hub in Apple Pro Keyboard, 0x05ac (Apple Inc.), 0x1003, 0x5d100000
USB Device: Apple Pro Keyboard, 0x05ac (Apple Inc.), 0x020c, 0x5d130000
USB Device: Bluetooth USB Host Controller, 0x05ac (Apple Inc.), 0x8206, 0x7d100000
USB Device: IR Receiver, 0x05ac (Apple Inc.), 0x8240, 0x7d200000

Ma ieri mi si è accesa una lampadina: ho tolto un banco di memoria facendo lavorare l'iMac con un solo banco da 1 GB: NON SI BLOCCA PIÚ (almeno fino ad adesso). Probabilmente penso che il problema risieda lo stesso nella scheda logica: infatti fino a qualche tempo fa avendo montati 2 banchi da 512 non si bloccava e poi sì. Quindi penso che la scheda logica vado "in confusione" quando ci sono 2 banchi di memoria! :D

Se magari avete qualche consiglio o volete sapere qualcosa in più, chiedete! :D

A questo punto penso sia la scheda logica che mi sta per abbandonare..

[Lester]

Messa così, sembrerebbe rimanere solo l'assistenza...