Hi Everyone i am getting the error below and my computer wont login. i have the new 2019 16in its less than 3 . weeks . old.

Been on the phone all week with Apple support. Their engineering wanted me to remove the following software to try:

Dropbox, LittleSnitch, CleanMyMac, iStatMenus, and Dropbox (Virtualbox)

I am suspect that these have nothing to do with the panic issues. Dropbox was more or less a laugh as it has nothing to do with the software at all. I thought i would post this here and see if others have anything in common with this. I am waiting for the panic to occur as its very intermittent, many times taking overnight for it to occur. I will post back on results after a few days.

However, this seems to be a lot more prevalent of an issue. This is a review of te MBP 16" on Dec 10, 2019, and at 11:40, the guy talks about this problem:

https://youtu.be/q--7N-4zDps?t=700

Hello,

same issue with one of my users. Seems to happen when device is awakened from sleep, must be restarted, problem persists. Funny thing is I also have a 16 with no issues, BUT I have the top end video card, and user has the standard version-what version video card have you?

Apple promises to repair or replace, at Apple's discretion, any parts found to be defective in materials or workmanship for the duration of the warranty period, or its extension by AppleCare PLUS.

They very seldom replace your entire computer. However, if they replace the mainboard during a repair, it also includes the Processor, RAM, and graphics chips as well as the boot drive. You then DO essentially have a new computer.

Same error here. I started with crashes after the MBP went to sleep and woke up again, now it crashes also regularly when I try to login. When I disconnect external monitor/power plug I can still login after a forced shutdown, so I now use it like this and disable sleeping. Seems like brining it back to repair will not resolve the problem anyway. I will still try the complete fresh re-install, just have to find the time as this is my working machine. Very disappointed.

I am having a similar issue as well. I had it consistently the first 3 days after my computer was delivered. I then turned off the "Automatic Graphics Switching" option in the energy saver menu under system preferences. It worked fine for a couple of days and I decided to turn the option back on as a troubleshooting step. It worked fine for another 2 days and then I got another crash. I turned off the option again and have left it off for about 3 days with no issues. This morning I got this error:

panic(cpu 6 caller 0xffffff7f8799c97b): GPU Panic: mux-regs 5 3 7f 1f 0 0 severity 3 WS-ready 0 switch-state 0 IG FBs 0 EG FBs 1:0 power-state 0 3D idle HDA idle system-state 2 power-level 5:0 power-retry 0:4 connect-change 0 : [3:0:0] GPU Not Found! PCI Config Access Fails!!!

From what I've been reading online, the issue appears to be with the intel gpu. However, I assumed that turning off the graphics switching option would keep me on the AMD GPU. I will keep you guys posted on what happens with my machine. Cheers.

Have the same issue, mac crashes after some time, gpu or cpu panic, couldnt wake up from sleep would just reboot, got flickering blue screen more then 3 times now since first got it back in dec, crashes when switching automatically from igpu to dgpu vice versa, apple support's a dead end couldnt fix the issue kept blaming software and wait for "next update" = official response since update 15.2

Has anyone managed to fix this without a machine or logic board replacement?

I also have the same issues, and have been through all attempted steps including clean formatted install with SMC & NVRAM reset. For me the machine will always panic when resuming from sleep and will only successfully boot perhaps one time in 10, plus, the machine will panic with userspace watchdog timeouts randomly during normal use. This effectively renders the machine impossible to use for any meaningful task.

I have been in touch with Apple support and communicated the above, however, they insist it is a software issue and will not offer to replace the machine. They ran through the file collection call and they never made the scheduled call back or replied to any follow up emails. When I called them back they suggested only to change another energy saver setting (one I had already tried) and the issue still occurred while I was on the phone to them. I asked again for a machine replacement as the machine is unusable and they refuse, only offering to wait for a software fix or take it to a Genius Bar (with no clarity on what the options or process would be).

The fact that this happens straight from boot with clean formatted installs invalidates any attempt to blame this on 3rd party extensions or other user issues.

Personally I do not understand why they will not replace the machine as this seems to be a fix for most people, and this is terrible customer care from Apple and I'm amazed it is not a more well publicised issue. Although it does not seem to be every MacBook user impacted, it is clearly many customers who have these significant issues.

FYI, I have even tried running Windows under bootcamp and that also has issues. It has never panicked under safe boot but then in that mode the discrete GPU is not enabled.

I have the same issue as well with the "PowerPlay failed to resume." I bought this computer in late November and this issue only seemed to start happening within the past few days. I'm currently testing to see if I can reproduce the issue under safe mode. If it is indeed a hardware issue I guess I'll have to visit an Apple Store and take it up with them.

I have the exact same specs and my machine kept restarting when I open the lid. I have since returned it and awaiting replacement. I read somewhere that some apps that may not be updated to meet Catalina's 64-bit compatibility could be causing the issue - but can't say for certain. Last I checked, Dropbox and Adobe Creative Cloud were part of the apps (both that were installed at the time of the reboots) that weren't updated yet. Might try to use the computer for a day or two without any third-party apps installed to see if that helps.

CMM has absolutely nothing to do with this... this was tried along with fresh installs of Cataline with NO additional software. There is a serious bug here and its becoming widespread. Right now, I'm leaning towards hardware because a friend of mine has the exact same machine as me and zero panics. Same OS, same firmware on the graphics, cards, etc. Yes, he uses CMM too.

m0unt41nman wrote:

CMM has absolutely nothing to do with this... this was tried along with fresh installs of Cataline with NO additional software. There is a serious bug here and its becoming widespread. Right now, I'm leaning towards hardware because a friend of mine has the exact same machine as me and zero panics. Same OS, same firmware on the graphics, cards, etc. Yes, he uses CMM too.

I was replying back to @philux who provided an EtreCheck report showing the use of CMM. If you read my reply I also said I doubted CMM was causing this particular issue since so many people have reported the GPU panics with the MBP 16". Suggesting to remove CMM was to help @philux specifically to minimize future issues since CMM has been shown to cause problems with peoples' Macs (just search these forums for how many systems are fixed just by removing CMM).

Steps to reproduce. Can anyone try it out?

1. With power plugged in, start a youtube video playing in fullscreen in chrome. (Something to make sure the graphics card is being used.)
2. Stop the video but leave it open.
3. Close the Macbook lid (power still plugged in)
4. Unplug the power.
5. Wait 10 minutes. Set a timer. Really. A full 10 minutes.
6. Lift the lid to wake back up the mac.

Result: The screen is black. After several seconds the fan spins loudly and stops. The Mac reboots with this crash.

Thoughts:

Figure it’s a hardware failure with the graphics switching. Just started a few days ago after everything being fine for months since I purchased the Mac.

Hardware

AMD Radeon Pro 5500M:

  Chipset Model: AMD Radeon Pro 5500M

  Type: GPU

  Bus: PCIe

  PCIe Lane Width: x16

  VRAM (Total): 8 GB

  Vendor: AMD (0x1002)

  Device ID: 0x7340

  Revision ID: 0x0040

  ROM Revision: 113-D3220E-190

  VBIOS Version: 113-D32206U1-019

  Option ROM Version: 113-D32206U1-019

  EFI Driver Version: 01.01.190

  Automatic Graphics Switching: Supported

  gMux Version: 5.0.0

  Metal: Supported, feature set macOS GPUFamily2 v1

Intel UHD Graphics 630:

  Chipset Model: Intel UHD Graphics 630

  Type: GPU

  Bus: Built-In

  VRAM (Dynamic, Max): 1536 MB

  Vendor: Intel

  Device ID: 0x3e9b

  Revision ID: 0x0002

  Automatic Graphics Switching: Supported

  gMux Version: 5.0.0

  Metal: Supported, feature set macOS GPUFamily2 v1

  Displays:

Color LCD:

  Display Type: Built-In Retina LCD

  Resolution: 3072 x 1920 Retina

  Framebuffer Depth: 24-Bit Color (ARGB8888)

  Main Display: Yes

  Mirror: Off

  Online: Yes

  Automatically Adjust Brightness: No

  Connection Type: Internal

Interesting today I open it up - never sure what to expect - and I get a different error "Sleep Wake failure in EFI". Seen various reports, some resolved with SMC reset (tried it), some turning off standby (don't want to disable features if I'm under warranty), and then the logic board failing.

I agree though, it's better to just format it, take it in, and hope they fix it with a hardware swap or replacement. Barely a week old, and I already have to give it up for who knows how long.

philux wrote:

5 months now without a fix or even a hint from Apple as to what is making this one of the most unstable macbooks ever.

Just a friendly reminder: I hope you and all the others on this thread have contacted Apple directly since Apple is not here on these forums. Unless users contact Apple directly nothing will ever get resolved and Apple will not be aware of the underlying hardware issue.

If users have contacted Apple directly and visited an Apple Store or an Apple Authorized Service Provider without having the issue resolved after so long, then users should be checking their local consumer laws for possible methods to resolve the issue.

Ok, Yesterday my mac was repaired. Motherboard was replaced. Today I had CRASH, when mac was sleeping, it looks like previous issue... oh my

in terminal:

log show --predicate 'eventMessage contains "Previous shutdown cause"' --last 24h

kernel: (AppleSMC) Previous shutdown cause: -20