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Level 1

3 points

fequent mid 2012 macbook pro retina kernel panic reboots possibly GPU related

I've been having a lot of what seem to be kernel panics, usually while watching/forwarding flash videos (e.g. on youtube) and or toggling between full screen or not or using Adobe Bridge and toggling between full screen or not.

What happens is that the screen goes blank (if I hit the keyboard I hear dinging sounds) and the screen goes blank, and I have to force a power off/on.

This has happened as often as 10 times a day.

I took my computer into the apple store, they ran their extended diagnostics and found nothing. The tech said it could be a logic board error, but because all the logs in the console were kernel panics he suspected it was the OS.

I reformatted the drive, reinstalled the OS and it ran fine for a day or so with minimal new software, including on youtube etc.

But today, I installed more software (Photoshop CC, a java based game, some extentions to firefox, and I experienced two panics today while viewing flash video.).

Anyone have any ideas?

I'd hate to shell out for a logic board replacement since I'm out of warrenty (just).

Thanks!!!

Interval Since Last Panic Report: 4 sec

Panics Since Last Report: 1

Anonymous UUID: 6A22FEFC-1709-E80A-D4FF-C1C3F46BADE4

Mon Sep 9 07:31:55 2013

panic(cpu 2 caller 0xffffff7fa4249f1a): "GPU Panic: [<None>] 5 0 a0 d9 9 8 0 3 : NVRM[0/1:0:0]: Read Error 0x00000100: CFG 0xffffffff 0xffffffff 0xffffffff, BAR0 0x103000000 0xffffff81164c7000 0x0e7150a2, D0, P1/4\n"@/SourceCache/AppleGraphicsControl/AppleGraphicsControl-3.4.5/src/AppleM uxControl/kext/GPUPanic.cpp:127

Backtrace (CPU 2), Frame : Return Address

0xffffff8115c0b020 : 0xffffff8022e1d626

0xffffff8115c0b090 : 0xffffff7fa4249f1a

0xffffff8115c0b160 : 0xffffff7fa4685f1e

0xffffff8115c0b220 : 0xffffff7fa475a12d

0xffffff8115c0b260 : 0xffffff7fa475a18e

0xffffff8115c0b2d0 : 0xffffff7fa4a71146

0xffffff8115c0b340 : 0xffffff7fa4782a75

0xffffff8115c0b360 : 0xffffff7fa468cd50

0xffffff8115c0b410 : 0xffffff7fa468a7d0

0xffffff8115c0b610 : 0xffffff7fa468c8e7

0xffffff8115c0b700 : 0xffffff7fa4c61c73

0xffffff8115c0b760 : 0xffffff7fa4c5eea8

0xffffff8115c0b7b0 : 0xffffff7fa4c48915

0xffffff8115c0b7e0 : 0xffffff7fa4c03ddf

0xffffff8115c0b800 : 0xffffff7fa4c14cec

0xffffff8115c0b830 : 0xffffff7fa4c14a93

0xffffff8115c0b880 : 0xffffff7fa4c13491

0xffffff8115c0b8a0 : 0xffffff7fa4c436c6

0xffffff8115c0b8d0 : 0xffffff7fa4c43ad2

0xffffff8115c0b910 : 0xffffff7fa4c0ee2f

0xffffff8115c0ba90 : 0xffffff7fa4c3ff0f

0xffffff8115c0bb50 : 0xffffff7fa4c0d8c8

0xffffff8115c0bba0 : 0xffffff8023266e69

0xffffff8115c0bbc0 : 0xffffff8023268410

0xffffff8115c0bc20 : 0xffffff8023265e2f

0xffffff8115c0bd70 : 0xffffff8022e98c01

0xffffff8115c0be80 : 0xffffff8022e20b3d

0xffffff8115c0beb0 : 0xffffff8022e10448

0xffffff8115c0bf00 : 0xffffff8022e1961b

0xffffff8115c0bf70 : 0xffffff8022ea6536

0xffffff8115c0bfb0 : 0xffffff8022ece9e3

Kernel Extensions in backtrace:

com.apple.driver.AppleMuxControl(3.4.5)[49FEF732-D7A3-327B-A7AA-6AC5A6E3DCFF]@0 xffffff7fa423c000->0xffffff7fa424efff

dependency: com.apple.driver.AppleBacklightExpert(1.0.4)[1D0BB11E-7D71-34CF-ACC3-57DF01CADA 08]@0xffffff7fa4234000

dependency: com.apple.iokit.IOPCIFamily(2.7.3)[1D668879-BEF8-3C58-ABFE-FAC6B3E9A292]@0xffff ff7fa3446000

dependency: com.apple.driver.AppleGraphicsControl(3.4.5)[4A2C8548-7EF1-38A9-8817-E8CB34B8DC A6]@0xffffff7fa4239000

dependency: com.apple.iokit.IOACPIFamily(1.4)[A35915E8-C1B0-3C0F-81DF-5515BC9002FC]@0xfffff f7fa3987000

dependency: com.apple.iokit.IONDRVSupport(2.3.7)[6C8CFC18-75F0-3DEF-86C7-CEB2C1FD6BB1]@0xff ffff7fa4222000

dependency: com.apple.iokit.IOGraphicsFamily(2.3.7)[990D1A42-DF16-3AB9-ABC1-6A88AC142244]@0 xffffff7fa41d0000

com.apple.NVDAResman(8.1.2)[96AE69DE-8A37-39D0-B2D3-D8446A6AA670]@0xffffff7fa46 24000->0xffffff7fa48c8fff

dependency: com.apple.iokit.IOPCIFamily(2.7.3)[1D668879-BEF8-3C58-ABFE-FAC6B3E9A292]@0xffff ff7fa3446000

dependency: com.apple.iokit.IONDRVSupport(2.3.7)[6C8CFC18-75F0-3DEF-86C7-CEB2C1FD6BB1]@0xff ffff7fa4222000

dependency: com.apple.iokit.IOGraphicsFamily(2.3.7)[990D1A42-DF16-3AB9-ABC1-6A88AC142244]@0 xffffff7fa41d0000

com.apple.nvidia.gk100hal(8.1.2)[8007AA34-6789-37E9-B069-A414AA26C6B6]@0xffffff 7fa48c9000->0xffffff7fa4bfafff

dependency: com.apple.NVDAResman(8.1.2)[96AE69DE-8A37-39D0-B2D3-D8446A6AA670]@0xffffff7fa46 24000

dependency: com.apple.iokit.IOPCIFamily(2.7.3)[1D668879-BEF8-3C58-ABFE-FAC6B3E9A292]@0xffff ff7fa3446000

com.apple.GeForce(8.1.2)[7EC545A4-4B57-32F1-8DC3-C31023AFBDCB]@0xffffff7fa4bfb0 00->0xffffff7fa4cc8fff

dependency: com.apple.NVDAResman(8.1.2)[96AE69DE-8A37-39D0-B2D3-D8446A6AA670]@0xffffff7fa46 24000

dependency: com.apple.iokit.IONDRVSupport(2.3.7)[6C8CFC18-75F0-3DEF-86C7-CEB2C1FD6BB1]@0xff ffff7fa4222000

dependency: com.apple.iokit.IOPCIFamily(2.7.3)[1D668879-BEF8-3C58-ABFE-FAC6B3E9A292]@0xffff ff7fa3446000

dependency: com.apple.iokit.IOGraphicsFamily(2.3.7)[990D1A42-DF16-3AB9-ABC1-6A88AC142244]@0 xffffff7fa41d0000

BSD process name corresponding to current thread: Setup Assistant

Mac OS version:

12E55

Kernel version:

Darwin Kernel Version 12.4.0: Wed May 1 17:57:12 PDT 2013; root:xnu-2050.24.15~1/RELEASE_X86_64

Kernel UUID: 896CB1E3-AB79-3DF1-B595-549DFFDF3D36

Kernel slide: 0x0000000022c00000

Kernel text base: 0xffffff8022e00000

System model name: MacBookPro10,1 (Mac-C3EC7CD22292981F)

System uptime in nanoseconds: 1038576697742

last loaded kext at 966559123831: com.apple.iokit.SCSITaskUserClient 3.5.5 (addr 0xffffff7fa4ff7000, size 36864)

last unloaded kext at 1037025841004: com.apple.driver.AppleUSBCDC 4.1.23 (addr 0xffffff7fa45de000, size 12288)

loaded kexts:

com.apple.filesystems.afpfs 10.0

com.apple.nke.asp_tcp 7.1.0

com.apple.iokit.IOBluetoothSerialManager 4.1.4f2

com.apple.driver.AppleHWSensor 1.9.5d0

com.apple.driver.AudioAUUC 1.60

com.apple.filesystems.autofs 3.0

com.apple.iokit.IOUserEthernet 1.0.0d1

com.apple.driver.AGPM 100.12.87

com.apple.driver.ApplePlatformEnabler 2.0.6d1

com.apple.driver.X86PlatformShim 1.0.0

com.apple.driver.AppleMikeyHIDDriver 122

com.apple.driver.AppleUpstreamUserClient 3.5.10

com.apple.Dont_Steal_Mac_OS_X 7.0.0

com.apple.driver.AppleMikeyDriver 2.3.7fc4

com.apple.driver.AppleHDA 2.3.7fc4

com.apple.driver.AppleIntelHD4000Graphics 8.1.2

com.apple.GeForce 8.1.2

com.apple.driver.AppleSMCPDRC 1.0.0

com.apple.iokit.BroadcomBluetoothHCIControllerUSBTransport 4.1.4f2

com.apple.driver.ApplePolicyControl 3.4.5

com.apple.driver.AirPort.Brcm4331 615.20.17

com.apple.driver.AppleLPC 1.6.0

com.apple.driver.AppleSMCLMU 2.0.3d0

com.apple.driver.AppleIntelFramebufferCapri 8.1.2

com.apple.driver.AppleMuxControl 3.4.5

com.apple.driver.AppleMCCSControl 1.1.11

com.apple.driver.AppleUSBTCButtons 237.1

com.apple.driver.AppleUSBTCKeyboard 237.1

com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1

com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1

com.apple.BootCache 34

com.apple.driver.XsanFilter 404

com.apple.iokit.IOAHCIBlockStorage 2.3.1

com.apple.driver.AppleUSBHub 5.5.5

com.apple.driver.AppleSDXC 1.4.2

com.apple.driver.AppleAHCIPort 2.5.2

com.apple.driver.AppleUSBEHCI 5.5.0

com.apple.driver.AppleUSBXHCI 5.6.0

com.apple.driver.AppleEFINVRAM 1.7

com.apple.driver.AppleSmartBatteryManager 161.0.0

com.apple.driver.AppleRTC 1.5

com.apple.driver.AppleACPIButtons 1.7

com.apple.driver.AppleHPET 1.8

com.apple.driver.AppleSMBIOS 1.9

com.apple.driver.AppleACPIEC 1.7

com.apple.driver.AppleAPIC 1.6

com.apple.driver.AppleIntelCPUPowerManagementClient 196.0.0

com.apple.nke.applicationfirewall 4.0.39

com.apple.security.quarantine 2.1

com.apple.driver.AppleIntelCPUPowerManagement 196.0.0

com.apple.iokit.IOSCSIBlockCommandsDevice 3.5.5

com.apple.security.SecureRemotePassword 1.0

com.apple.iokit.IOUSBMassStorageClass 3.5.1

com.apple.iokit.IOSerialFamily 10.0.6

com.apple.kext.triggers 1.0

com.apple.iokit.IOSCSIArchitectureModelFamily 3.5.5

com.apple.iokit.IOSurface 86.0.4

com.apple.iokit.IOBluetoothFamily 4.1.4f2

com.apple.driver.DspFuncLib 2.3.7fc4

com.apple.iokit.IOAudioFamily 1.8.9fc11

com.apple.kext.OSvKernDSPLib 1.6

com.apple.iokit.IOAcceleratorFamily 74.5.1

com.apple.nvidia.gk100hal 8.1.2

com.apple.NVDAResman 8.1.2

com.apple.iokit.AppleBluetoothHCIControllerUSBTransport 4.1.4f2

com.apple.iokit.IO80211Family 530.4

com.apple.iokit.IONetworkingFamily 3.0

com.apple.driver.AppleSMBusPCI 1.0.11d0

com.apple.driver.AppleHDAController 2.3.7fc4

com.apple.iokit.IOHDAFamily 2.3.7fc4

com.apple.driver.X86PlatformPlugin 1.0.0

com.apple.driver.AppleSMC 3.1.4d2

com.apple.driver.IOPlatformPluginFamily 5.3.0d51

com.apple.driver.AppleGraphicsControl 3.4.5

com.apple.driver.AppleBacklightExpert 1.0.4

com.apple.iokit.IONDRVSupport 2.3.7

com.apple.driver.AppleSMBusController 1.0.11d0

com.apple.iokit.IOGraphicsFamily 2.3.7

com.apple.driver.AppleUSBMultitouch 237.3

com.apple.iokit.IOUSBHIDDriver 5.2.5

com.apple.driver.AppleThunderboltDPInAdapter 1.8.9

com.apple.driver.AppleThunderboltDPAdapterFamily 1.8.9

com.apple.driver.AppleThunderboltPCIDownAdapter 1.2.6

com.apple.driver.AppleUSBMergeNub 5.5.5

com.apple.driver.AppleUSBComposite 5.2.5

com.apple.driver.AppleThunderboltNHI 1.7.8

com.apple.iokit.IOThunderboltFamily 2.4.0

com.apple.iokit.IOUSBUserClient 5.5.5

com.apple.iokit.IOAHCIFamily 2.3.1

com.apple.iokit.IOUSBFamily 5.6.0

com.apple.driver.AppleEFIRuntime 1.7

com.apple.iokit.IOHIDFamily 1.8.1

com.apple.iokit.IOSMBusFamily 1.1

com.apple.security.sandbox 220.3

com.apple.kext.AppleMatch 1.0.0d1

com.apple.security.TMSafetyNet 7

com.apple.driver.DiskImages 345

com.apple.iokit.IOStorageFamily 1.8

com.apple.driver.AppleKeyStore 28.21

com.apple.driver.AppleACPIPlatform 1.7

com.apple.iokit.IOPCIFamily 2.7.3

com.apple.iokit.IOACPIFamily 1.4

com.apple.kec.corecrypto 1.0

System Profile:

Model: MacBookPro10,1, BootROM MBP101.00EE.B02, 4 processors, Intel Core i7, 2.6 GHz, 8 GB, SMC 2.3f35

Graphics: Intel HD Graphics 4000, Intel HD Graphics 4000, Built-In, 512 MB

Graphics: NVIDIA GeForce GT 650M, NVIDIA GeForce GT 650M, PCIe, 1024 MB

Memory Module: BANK 0/DIMM0, 4 GB, DDR3, 1600 MHz, 0x80AD, 0x484D54333531533642465238432D50422020

Memory Module: BANK 1/DIMM0, 4 GB, DDR3, 1600 MHz, 0x80AD, 0x484D54333531533642465238432D50422020

AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0xEF), Broadcom BCM43xx 1.0 (5.106.98.100.17)

Bluetooth: Version 4.1.4f2 12041, 2 service, 18 devices, 1 incoming serial ports

Network Service: Wi-Fi, AirPort, en0

Serial ATA Device: APPLE SSD SM512E, 500.28 GB

USB Device: Touro Desk Pro, 0x4971, 0x1013, 0x14a00000 / 1

USB Device: hub_device, 0x8087 (Intel Corporation), 0x0024, 0x1a100000 / 2

USB Device: FaceTime HD Camera (Built-in), apple_vendor_id, 0x8510, 0x1a110000 / 3

USB Device: hub_device, 0x8087 (Intel Corporation), 0x0024, 0x1d100000 / 2

USB Device: hub_device, 0x0424 (SMSC), 0x2512, 0x1d180000 / 3

USB Device: BRCM20702 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0x1d181000 / 5

USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x8286, 0x1d181300 / 8

USB Device: Apple Internal Keyboard / Trackpad, apple_vendor_id, 0x0262, 0x1d182000 / 4

iPhone 5, iOS 6.1.2

Posted on Sep 10, 2013 10:47 PM

220 replies

May 7, 2014 11:55 AM in response to NoComment

Our's is a mid 2012 with 256 GB SSD and 8GB. No problems with drive.

eddie268

Level 1

13 points

May 7, 2014 12:04 PM in response to JJulio

Like Peter Lorraine, mine is a mid 2012 15 inch macbook pro retina with 256 GB SSD and 8GB. I also have had no problems with the drive.

When the computer crashes and I look at the log, it always mentions a GPU kernel panic.

jkirma

Level 1

0 points

May 8, 2014 3:42 AM in response to NoComment

NoComment, do these freezes occur without crash logs indicating GPU issues? How often they're triggered (about once a week?), and is there a specific method to induce a freeze?

My MacBook Pro continues to exhibit roughly one random freeze a week, without no particular reproducibility, and without any crash logs.

I feel we probably share the same issue after logic board replacement.

May 8, 2014 4:19 AM in response to jkirma

jkirma, there are absolutely no log entries, the logs stop and the next message is the boot up message plus all the stuff that comes during booting. mac os x doesn't recognize the crash on reboot at all.

log entries look like this:

07.05.14 09:19:49,075 com.apple.WebKit.Networking[224]: ERROR: ForceShrinkPersistentStore_NoLock -delete- We do not have a BLOB or TEXT column type. Instead, we have 5.

07.05.14 09:19:49,075 com.apple.WebKit.Networking[224]: ERROR: ForceShrinkPersistentStore_NoLock -delete- We do not have a BLOB or TEXT column type. Instead, we have 5.

07.05.14 09:19:57,190 xpcproxy[3890]: assertion failed: 13C1021: xpcproxy + 3438 [D559FC96-E6B1-363A-B850-C7AC9734F210]: 0x2

07.05.14 09:23:38,000 kernel[0]: CODE SIGNING: cs_invalid_page(0x1000): p=3893[GoogleSoftwareUp] final status 0x0, allowing (remove VALID) page

07.05.14 09:24:58,000 bootlog[0]: BOOT_TIME 1399447498 0

07.05.14 09:25:04,000 syslogd[19]: Configuration Notice:

ASL Module "com.apple.appstore" claims selected messages.

Those messages may not appear in standard system log files or in the ASL database.

07.05.14 09:25:04,000 syslogd[19]: Configuration Notice:

ASL Module "com.apple.authd" sharing output destination "/var/log/system.log" with ASL Module "com.apple.asl".

Output parameters from ASL Module "com.apple.asl" override any specified in ASL Module "com.apple.authd".

07.05.14 09:25:04,000 syslogd[19]: Configuration Notice:

ASL Module "com.apple.authd" claims selected messages.

Those messages may not appear in standard system log files or in the ASL database.

07.05.14 09:25:04,000 syslogd[19]: Configuration Notice:

ASL Module "com.apple.bookstore" claims selected messages.

Those messages may not appear in standard system log files or in the ASL database.

07.05.14 09:25:04,000 syslogd[19]: Configuration Notice:

ASL Module "com.apple.eventmonitor" claims selected messages.

Those messages may not appear in standard system log files or in the ASL database.

07.05.14 09:25:04,000 syslogd[19]: Configuration Notice:

after the second replacement, a week of work was fine, but for the last days i have crashed two times a day! there is absolutely no hint which task or application could cause this. it never happens after reboot, the computer has to run for a certain time until it appears. when it appears, the discrete GPU is on and i hear no fan so no heavy load on the system.

jkirma

Level 1

0 points

May 8, 2014 7:36 AM in response to NoComment

This sounds essentially the same as in my case, except that it occurred even when I had attempted to disable discrete GPU. (I wonder if gfxcardstatus might not actually disable it entirely.) Persistence of the issue even after logic board replacement makes me wonder (once again) if the issue is really somehow related to recent OSX versions.

May 8, 2014 8:26 AM in response to jkirma

jkirma and nocomment - this looks more like a corrupted installation of the OS /software than a GPU related issue. It may be related to the software re-installation after your logic board replacement. I can find this problem discussed in several threads elsewhere in the support forums for example https://discussions.apple.com/thread/6049709?answerId=25347948022#25347948022

and it does not appear restricted to MBP retina. Unfortunately I didn't find a thread with a solution 😟 .

Peter

May 9, 2014 1:08 AM in response to Peter Lorraine

@Peter Lorraine, why do you think that this comes from a "corrupted installation"? this happened on my from the very beginning (guess it must have been 10.8 at this time), then it improved for whatever reason (probably using less demanding software), and now it's back since october last year. i have reinstalled mavericks several times over the existing instance, and now i've reinstalled totally from scratch, no changes. so what could've been corrupted to cause this? it works for hours and then freezes. doesn't sound like an error in any file of the os.

May 9, 2014 10:44 AM in response to NoComment

Nocomment - I don't have any evidence that it is a corrupted installation other than the thread and others that I pointed too. Don't take my opinion as gospel here. This looks to me like a software problem as it is hitting a variety of machines including iMac's in the thread list. I searched for "ASL Module "com.apple.appstore" claims selected messages" in google to find multiple threads. Call it corrupted software rather than a corrupted installation if you like - I am not certain what's gone wrong here but this doesn't look like the GPU panic issue. The "suggestions" in the threads involve things like "fixing the disk" with utilities, checking drive permissions, and re-installing the OS. Other than lost data, I would think to restore the machine to as clean a state as possible and then re-install the OS and test that before adding any user programs or data.

I see that you tried both reinstallation over an old install and a clean install.

May 12, 2014 11:47 PM in response to Peter Lorraine

@peter, apple tech support always wanted me to test this on a clean installation with no 3rd party applications installed. well, thing is, what do you do with a clean install productively? i let imovie ran for two days over the weeked rendering a video with discrete GPU in use, no failure. but that's like having a problem with your car on bumpy roads and being asked by the mechanics to drive on a flat surface to see if the problem exists and is reproducable. if there would be the slightest chance to find a pattern when this happens, i would be so happy to do everything i can to perform the test on a clean installation. but simply letting the machine run on a clean install doesn't help in my case, i'm sure it is caused by some software, but under os x a software (at least as it's not using its own kexts) can never crash the whole system except the system (OS or HW) has a bug/defect.

Advancio

Level 1

8 points

May 14, 2014 12:42 AM in response to Peter Lorraine

Hi. Just to throw in my two öre... I had the exact same problem with my MacBook Pro Retina 15" started on April 28th 2014 (MBP bought in Sept 2012). Same symptomes: difficult to avoid crashes at heavy loads (games) or using HDMI for a presentation. At Genius Bar, the tech confirmed this was a known issue, ran a classic diagnostic test and said that the Logic Board will be replaced.

I don't have any warranty anymore and no AppleCare, however the tech said that since I bought the MBP at their store they could file a reclaim so I don't have to pay the 3575SEK (about US$546). Only drawback: they did not have the board on site, which makes me in a really bad situation: no Counter Strike:GO for a week! Do you think I can survive? ;-)

Anyway, if that's the way Apple take care of their customer, I'm not surprise that nobody wants to go back to a Windows PC! Perfect service and really good machines leads to the perfect recipe to keep customers satisfied.

And the tech guy could also help me solving an issue with my App Store settings for an App I released a month ago. Thanks Apple!

May 17, 2014 4:28 AM in response to JJulio

Hi All,

Since the 12th of May I've exactly the same issue; Mbpr (Sep 2012) crashing once a day and after a few days several times per hour. After the crash, rebooting sometimes gives an error message but often not. I was using an external monitor (via Thunderbolt) and charging the macbook. The workaround I use is to disable automatic switching and only using the Nvidia GPU and not the integrated Intel one. The problem completely disappears, even with the external monitor connected (via Thunderbolt) and charging.

It is amazing that a lot of use have this problem since a few weeks. Even with logic boards replaced, the problem continious. For me, it looks like an OS software issue or (I hope not) an App issue. I recently updated Spotify, MS Remote Desktop and installed Messenger for Telegram. All the other Apps have not changed (last one May 6th).

proshano

Level 1

0 points

May 17, 2014 12:36 PM in response to CeesBerrens

That's interesting - for most of us the problem is solved by avoiding dedicated graphics and external displays. I actually encounter no crashes when forcing internal GPU on this 2012 retina macbook. I was convinced it was a hardware problem but since logic board replacement is commonly not a sure fix, I wonder if it is software...

May 17, 2014 1:53 PM in response to proshano

Hi Proshano,

Yesterday and today, I used only the nVidea GPU including an external monitor connected via thunderbolt and no crashes at all. Maybe you can test it with your Mbpr to determine if this is a good workaround.

eddie268

Level 1

13 points

May 18, 2014 10:48 AM in response to CeesBerrens

Hi CeesBerrens,

Have others found this as well? That connected to an external monitor via Thunderbolt and forcing the machine to run only in discrete graphics mode (the nVidea GPU) there are no crashes? What happens when unplugging the machine from the monitor to go portable? Is it possible to force it to run in discrete graphics mode there as well? I don't really care about battery life. Just hate these frequent crashes that occur when plugging or unplugging the external monitor or when the graphics switches modes.

thanks for any input,

May 18, 2014 12:08 PM in response to eddie268

you could use gfxcardstatus utility to force any of the two cards to be always used.

fequent mid 2012 macbook pro retina kernel panic reboots possibly GPU related