I run an MBP 13-inch Mid-2012, with an SSD I installed and running OS X Catalina 10.15.4
I notice that sometimes when it goes to sleep it shuts down if it isn't plugged in (I have to hit the power up when I use it again) and today it was plugged in, but when I touched he keyboard instead of waking from sleep as usual it was at the login screen and was telling me the computer shut down because of a problem.
This was the report the computer generated:
Sleep Wake failure in EFI
Failure code:: 0xffffffff 0x0000001f
Please IGNORE the below stackshot
================================================================
Date/Time: 2020-05-13 02:45:21 -0400
OS Version: ??? ??? (Build ???)
Architecture: x86_64
Report Version: 29
Data Source: Stackshots
Shared Cache: 0x2f3e000 F04A453C-3C9D-3D12-B86E-C514F0DE0B14
Event: Sleep Wake Failure
Duration: 0.00s
Steps: 1
Time Awake Since Boot: 12s
Process: swd [376]
Architecture: x86_64
Footprint: 380 KB
Start time: 2020-05-13 02:45:21 -0400
End time: 2020-05-13 02:45:21 -0400
Num samples: 1 (1)
Thread 0x84f 1 sample (1) priority 4 (base 4)
<thread QoS background (requested background), thread darwinbg, process darwinbg, IO tier 2>
1 start + 1 (libdyld.dylib + 109769) [0x7fff6a16ecc9] 1
1 ??? [0x10ccb6454] 1
1 ??? [0x10ccb61dd] 1
1 __stack_snapshot_with_config + 10 (libsystem_kernel.dylib + 135862) [0x7fff6a2d02b6] 1
*1 ??? [0xffffff80002c8206] 1
*1 ??? [0xffffff80009875f7] 1
*1 ??? [0xffffff80008a0001] 1
*1 ??? [0xffffff80002eb9e7] (running) 1
Binary Images:
0x7fff6a154000 -
0x7fff6a18afff libdyld.dylib (750.5)
<D2A07EF5-A64B-3692-BE13-89DAA2EC5E80> /usr/lib/system/libdyld.dylib
0x7fff6a2af000 -
0x7fff6a2dbfff libsystem_kernel.dylib (6153.101.6) <E76440E1-D1E8-3D9A-8B47-D01F554FF1C4> /usr/lib/system/libsystem_kernel.dylib
Model: MacBookPro9,2, BootROM 231.0.0.0.0, 2 processors, Dual-Core Intel Core i5, 2.5 GHz, 8 GB, SMC 2.2f44
Graphics: kHW_IntelHD4000Item, Intel HD Graphics 4000, spdisplays_builtin
Memory Module: BANK 0/DIMM0, 4 GB, DDR3, 1600 MHz, 0x802C, 0x384B54463531323634485A2D314736453220
Memory Module: BANK 1/DIMM0, 4 GB, DDR3, 1600 MHz, 0x802C, 0x384B54463531323634485A2D314736453220
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0xF5), Broadcom BCM43xx 1.0 (7.21.190.33 AirPortDriverBrcm4360-1601.1)
Bluetooth: Version 7.0.4f6, 3 services, 18 devices, 1 incoming serial ports
Network Service: Wi-Fi, AirPort, en1
Serial ATA Device: WDC WDS100T2B0A-00SM50, 1 TB
Serial ATA Device: HL-DT-ST DVDRW GS41N
USB Device: USB 2.0 Bus
USB Device: Hub
USB Device: Hub
USB Device: Apple Internal Keyboard / Trackpad
USB Device: IR Receiver
USB Device: BRCM20702 Hub
USB Device: Bluetooth USB Host Controller
USB Device: USB 2.0 Bus
USB Device: Hub
USB Device: FaceTime HD Camera (Built-in)
USB Device: USB 3.0 Bus
Thunderbolt Bus: MacBook Pro, Apple Inc., 25.1
Any ideas as to what's going on? This seemed to only start happening recently. Should I reset the SMC? NVRAM?
I did as @Allan suggested in comments and got this:
Timestamp Ty Process[PID:TID]
2020-05-14 04:45:06.022 Df kernel[0:a9] (AppleSMC) Previous shutdown cause: -104
So does this mean reset SMC?
ETA II : Reset SMC, problem seems to be solved, though my FileVault was disabled.