Bootcamp crashes on startup

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Level 1

9 points

Bootcamp crashes on startup

I've had an issue with Bootcamp for a while now on my 13" MBP 2019 where it crashes on startup and I get a kernel panic report when it boots back into macOS. It may happen after it randomly shuts off while in Bootcamp while the computer is shut (the computer shuts itself down for no reason whenever I leave my laptop lid shut in Bootcamp for any decent length of time), as I noticed that that precipitated the most recent panic.

Basically, I try to boot into Bootcamp, I reach the login screen, the input doesn't work, then the fans spin and the computer shuts off. The kernel panic report on macOS contains the following description of the error: panic(cpu 0 caller 0xfffffff0239234b8): PUP PANIC - deserialize: saved state does not match current state. serialization cursor 0x2d9b4 - pup-workloop(1). Bootcamp works fine after I reboot it, at least until I run into the issue again.

There are a few other posts about this with no solutions. I've reinstalled macOS and Bootcamp in the past to try to fix it to no avail, and I've contacted both Apple's and Microsoft's support teams. I've also done SMC/PRAM/NVRAM resets. If anyone has any suggestions, please let me know.

MacBook Pro 13″, macOS 11.2

Posted on Mar 19, 2021 8:24 AM

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Answer 1

Loner T

Level 9

59,566 points

Mar 19, 2021 9:05 AM in response to Yoshimax

If you are in Windows, and close the lid, which should put Windows to Sleep (or Hibernate), when you open the lid, Windows goes through a device (re)discovery phase, which can fail. This can cause a BSoD. Temporarily, as a test, disable Sleep and Hibernate and check if you can close the lid and open it back again, without a BSoD.

I will assume that macOS Sleep works properly.

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Answer 2

Loner T

Level 9

59,566 points

Mar 20, 2021 8:13 AM in response to Yoshimax

The (re)discovery does not work properly on Macs. This has been a problem for a long time on Macs. My recommendations is to leave Sleep/Hibernate disabled. If you have Windows Fast Start enabled, you may want to disable it as well. It can cause issues with USB power when you switch between macOS and Windows.

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Answer 3

Yoshimax Author

Level 1

9 points

Mar 20, 2021 6:50 AM in response to Loner T

Interesting - looks like that may be the issue. I tried leaving my laptop shut overnight while booted into Windows after changing the sleep settings like you suggested, and it didn't crash when I reopened it (it always does if I leave it overnight).

Yeah, no issues on the macOS partition.

What causes this issue? Is it a driver problem?

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Bootcamp crashes on startup

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