[SOLVED]GPU Panic: mux-regs

[G.Beard]

820-3332

Here is half a panic report.
No liquid, no visible damage.
ASD reports nothing.

Fri Jun 2 13:18:33 2017

*** Panic Report ***
panic(cpu 0 caller 0xffffff7fa978a80b): "GPU Panic: mux-regs 5 0 a0 d9 9 8 severity 3 switch-state 0 EG power-state 0 3D 1 HDA 0 : \n"@/Library/Caches/com.apple.xbs/Sources/AppleGraphicsControl/AppleGraphicsControl-3.14.41/src/AppleMuxControl/kext/GPUPanic.cpp:143
Backtrace (CPU 0), Frame : Return Address
0xffffff9213beb4f0 : 0xffffff80268ec3ec
0xffffff9213beb570 : 0xffffff7fa978a80b
0xffffff9213beb5e0 : 0xffffff7faa656662
0xffffff9213beb6a0 : 0xffffff7faa728f90
0xffffff9213beb700 : 0xffffff7faa72903a
0xffffff9213beb730 : 0xffffff7faa9d71bc
0xffffff9213beb780 : 0xffffff7faa9d687a
0xffffff9213beb7f0 : 0xffffff7faa755e76
0xffffff9213beb810 : 0xffffff7faa65d33e
0xffffff9213beb8c0 : 0xffffff7faa659f52
0xffffff9213bebac0 : 0xffffff7faa65be09
0xffffff9213bebbb0 : 0xffffff7faa5eba7d
0xffffff9213bebd90 : 0xffffff7faa5e9f91
0xffffff9213bebdb0 : 0xffffff7fa974aeeb
0xffffff9213bebe80 : 0xffffff7fa974accb
0xffffff9213bebee0 : 0xffffff7fa97494aa
0xffffff9213bebf00 : 0xffffff802692504a
0xffffff9213bebfb0 : 0xffffff802689a8f7
Kernel Extensions in backtrace:
com.apple.driver.AppleMuxControl(3.14.41)[7D69C554-B5D7-364C-8C83-096AD30B49FF]@0xffffff7fa977b000->0xffffff7fa978ffff
dependency: com.apple.driver.AppleGraphicsControl(3.14.41)[36E87B0A-B4FB-3072-AFF8-29BA084E38D8]@0xffffff7fa9768000
dependency: com.apple.iokit.IOACPIFamily(1.4)[4F7FB6AD-2498-3F71-827C-ED7AA4BF2511]@0xffffff7fa740d000
dependency: com.apple.iokit.IOPCIFamily(2.9)[C6E3195E-A0D7-3B71-B5F4-9EE9E182D4FC]@0xffffff7fa7132000
dependency: com.apple.iokit.IOGraphicsFamily(514.10)[E197EF14-F55B-3B9C-B903-91258C9CA382]@0xffffff7fa7e7c000
dependency: com.apple.driver.AppleBacklightExpert(1.1.0)[D25516DE-78B7-3C89-915C-447DEDAEFA56]@0xffffff7fa9776000
com.apple.nvidia.driver.NVDAResman(10.1.6)[559FA0AB-83E8-367D-92AC-8844BA6F568B]@0xffffff7faa5e7000->0xffffff7faa8d7fff
dependency: com.apple.iokit.IOPCIFamily(2.9)[C6E3195E-A0D7-3B71-B5F4-9EE9E182D4FC]@0xffffff7fa7132000
dependency: com.apple.iokit.IONDRVSupport(514.10)[79375D6E-7C89-3F2B-8AE2-186CAE5C2801]@0xffffff7fa7ec4000
dependency: com.apple.iokit.IOGraphicsFamily(514.10)[E197EF14-F55B-3B9C-B903-91258C9CA382]@0xffffff7fa7e7c000
dependency: com.apple.AppleGraphicsDeviceControl(3.14.41)[781CA97C-27C8-35C2-BDF3-44C535394021]@0xffffff7fa973b000
com.apple.nvidia.driver.NVDAGK100Hal(10.1.6)[EC84A280-2144-34B6-ABD9-1C35D14C4477]@0xffffff7faa8d8000->0xffffff7faaa8afff
dependency: com.apple.nvidia.driver.NVDAResman(10.1.6)[559FA0AB-83E8-367D-92AC-8844BA6F568B]@0xffffff7faa5e7000
dependency: com.apple.iokit.IOPCIFamily(2.9)[C6E3195E-A0D7-3B71-B5F4-9EE9E182D4FC]@0xffffff7fa7132000
com.apple.driver.AGPM(110.23.17)[3E92E313-274C-3175-A659-2CB88F03A707]@0xffffff7fa9747000->0xffffff7fa975efff
dependency: com.apple.iokit.IOPCIFamily(2.9)[C6E3195E-A0D7-3B71-B5F4-9EE9E182D4FC]@0xffffff7fa7132000
dependency: com.apple.driver.IOPlatformPluginFamily(6.0.0d8)[15B66A1C-63D8-3415-9635-A10039B4F0D1]@0xffffff7fa7d9d000
dependency: com.apple.iokit.IONDRVSupport(514.10)[79375D6E-7C89-3F2B-8AE2-186CAE5C2801]@0xffffff7fa7ec4000
dependency: com.apple.iokit.IOGraphicsFamily(514.10)[E197EF14-F55B-3B9C-B903-91258C9CA382]@0xffffff7fa7e7c000
dependency: com.apple.AppleGraphicsDeviceControl(3.14.41)[781CA97C-27C8-35C2-BDF3-44C535394021]@0xffffff7fa973b000

BSD process name corresponding to current thread: kernel_task
Boot args: -v

Mac OS version:
16E195

 

[jgraffis]

What year is this and what is the board # ?

 

[G.Beard]

What year is this and what is the board # ?

Oh shit..... 820-3332

 

[larossmann]

Surround U8900 in flux, use a micropencil and fresh solder to resolder all of the pins. Then use a little bit of hot air to reflow the surrounding area.

 

[G.Beard]

Surround U8900 in flux, use a micropencil and fresh solder to resolder all of the pins. Then use a little bit of hot air to reflow the surrounding area.

So it's likely the U8900 thing... Went to re-read the sticky but it was gone.
Cheers Louis, I'll post back.

 

[G.Beard]

I've touched up U8900 and reflowed everything in the area.
Not getting any panic running Furmark now. Ran it until the machine got hotter than I'm comfortable with.

I think it's solved.

 

[dukefawks]

U8900 has nothing to do with temperature. The crashes happen when the machine is flexed, bumped, etc.

 

[G.Beard]

U8900 has nothing to do with temperature.

I know it's nothng to do with temprature. Ran FurMark to switch to GFX to see if switching caused a KP.

The crashes happen when the machine is flexed, bumped, etc.

Because of bad solder joints.... OK I'll bend it and bash it about