I have the same issue...only difference is that I have not updated to 21H1 yet which means there seems to be a common denominator in the updates that come before that specific update.
Not really helpful
I also updated my video drivers recently and I am working on rolling back to see where I can find a fix. It could also be the built in Intel video chip not playing well (I updated both) with the NVIDIA card.
I ONLY have this problem (so far) when alt-tabbing out of a game which will shut down my NVIDIA GPU (since Firefox/desktop is using the onboard Intel video chip) which of course causes my NVIDIA card to shut down (this can be seen from the temp displayed according to HWiNFO going from it's current temp to 0).
Surprisingly setting the GPU to "prefer performance" and/or setting the global preference to use my NVIDIA card in the NVIDIA control panel (essentially forcing it to always be "on") did not seem to prevent this.
Will update if I find a solution...you do the same if you can.
Logs Below:
DRIVER_POWER_STATE_FAILURE (9f)
A driver has failed to complete a power IRP within a specific time.
Arguments:
Arg1: 0000000000000003, A device object has been blocking an Irp for too long a time
Arg2: ffff8e8839dd1630, Physical Device Object of the stack
Arg3: fffff8024ca6e750, nt!TRIAGE_9F_POWER on Win7 and higher, otherwise the Functional Device Object of the stack
Arg4: ffff8e883f0a5a20, The blocked IRP
Debugging Details:
Implicit thread is now ffff8e88`38cf0040
KEY_VALUES_STRING: 1
Key : Analysis.CPU.Sec
Value: 3
Key : Analysis.DebugAnalysisProvider.CPP
Value: Create: 8007007e on DESKTOP-NAR4F2T
Key : Analysis.DebugData
Value: CreateObject
Key : Analysis.DebugModel
Value: CreateObject
Key : Analysis.Elapsed.Sec
Value: 17
Key : Analysis.Memory.CommitPeak.Mb
Value: 80
Key : Analysis.System
Value: CreateObject
BUGCHECK_CODE: 9f
BUGCHECK_P1: 3
BUGCHECK_P2: ffff8e8839dd1630
BUGCHECK_P3: fffff8024ca6e750
BUGCHECK_P4: ffff8e883f0a5a20
DRVPOWERSTATE_SUBCODE: 3
FAULTING_THREAD: ffff8e8838cf0040
ADDITIONAL_DEBUG_TEXT: DXG Power IRP timeout.
BLACKBOXBSD: 1 (!blackboxbsd)
BLACKBOXNTFS: 1 (!blackboxntfs)
BLACKBOXPNP: 1 (!blackboxpnp)
BLACKBOXWINLOGON: 1
PROCESS_NAME: System
STACK_TEXT:
ffffd7081041e6a0 fffff802
62a14c34 : 000000000000000a ffffd708
1041e7d0 0000000000000000 00000000
00000000 : nt!KeStallExecutionProcessor+0x10c
ffffd7081041e720 fffff802
62e67d2a : ffff8e884059a000 00000000
ffffffff 0000000000000000 00000000
00000000 : nvlddmkm+0x84c34
ffffd7081041e750 fffff802
62e5a3c0 : 0000000000000003 00000000
00000000 ffffd70800610590 ffff8e88
4059a000 : nvlddmkm+0x4d7d2a
ffffd7081041e780 fffff802
62e4f984 : 0000000000000000 00000000
00000000 00000000c1d00002 ffff8e88
4059a000 : nvlddmkm+0x4ca3c0
ffffd7081041e810 fffff802
62e60c52 : ffff8e8800000014 ffff8e88
4059a000 ffff8e8840596010 ffff8e88
3d991820 : nvlddmkm+0x4bf984
ffffd7081041e880 fffff802
62a38bec : ffff8e8800000004 ffff8e88
3f0e3e10 ffff8e8800000025 ffff8e88
40590000 : nvlddmkm+0x4d0c52
ffffd7081041e8f0 fffff802
62be7635 : ffff8e884057c000 fffff802
00000000 ffff8e884057c000 ffff8e88
3d2bd000 : nvlddmkm+0xa8bec
ffffd7081041e9f0 fffff802
62be74c9 : ffff8e884057c000 00000000
00000000 ffff8e883d2bd000 ffff8e88
40648c30 : nvlddmkm+0x257635
ffffd7081041ea30 fffff802
62be4bb2 : ffff8e884057c000 00000000
00000000 ffff8e884059a000 ffffd708
00000000 : nvlddmkm+0x2574c9
ffffd7081041ea60 fffff802
62ba0433 : 0000000000000000 fffff802
6333c120 ffff8e88406d2018 ffffd708
1041ec40 : nvlddmkm+0x254bb2
ffffd7081041eae0 fffff802
62a9d782 : 0000000000000004 ffffd708
00000001 ffffd7081041ebf0 fffff802
631f7e60 : nvlddmkm+0x210433
ffffd7081041eb40 fffff802
62aa55d6 : 0000000000000000 00000000
00000013 ffff8e8800000001 ffff8e88
3f0308c8 : nvlddmkm+0x10d782
ffffd7081041ebc0 fffff802
62aa5825 : ffff8e88509c88c8 00000000
ff030000 00000000c1d00002 00000000
c1d00002 : nvlddmkm+0x1155d6
ffffd7081041edc0 fffff802
62aa58d3 : ffffd7081041ee60 00000000
00000000 0000000000000000 00000020
00000000 : nvlddmkm+0x115825
ffffd7081041ee20 fffff802
62a115a4 : 0000000000000000 00000000
00000000 0000000000000000 00000000
00000000 : nvlddmkm+0x1158d3
ffffd7081041f0c0 fffff802
62a1150f : ffffd7081041f200 00000000
00000014 0000000000000000 00000000
00000000 : nvlddmkm+0x815a4
ffffd7081041f170 fffff802
63185d39 : ffffd7081041f260 00000000
00000014 0000000000000000 ffffd708
1041f301 : nvlddmkm+0x8150f
ffffd7081041f1b0 fffff802
63185f97 : fffff80263185ccd 00000000
2080270d ffff8e883d444138 fffff802
62a0bfed : nvlddmkm+0x7f5d39
ffffd7081041f240 fffff802
629a430b : 0000000000000000 00000000
2080270d ffffd7081041f3b0 ca274b97
40b73df5 : nvlddmkm+0x7f5f97
ffffd7081041f2a0 fffff802
6319c468 : ffff8e883d0b4000 ffffd708
1041f389 0000000000000001 00000000
00000001 : nvlddmkm+0x1430b
ffffd7081041f300 fffff802
636cd8c7 : 0000000000000004 00000000
00000000 0000000000000000 ffff8e88
3d444000 : nvlddmkm+0x80c468
ffffd7081041f3f0 fffff802
636cd61b : 0000000000000000 ffff8e88
3d444000 0000000000000000 00000000
00000000 : nvlddmkm+0xd3d8c7
ffffd7081041f4c0 fffff802
636f8a8a : ffff8e883d444000 ffffd708
1041f5b9 0000000000000004 00000000
00000007 : nvlddmkm+0xd3d61b
ffffd7081041f510 fffff802
5e5b4b6e : fffff802636f8960 00000000
00000004 0000000000000000 00000000
ffffffff : nvlddmkm+0xd68a8a
ffffd7081041f620 fffff802
5e5b42ae : 0000000000000000 ffffd708
1041f6e1 0000000000000000 ffff8e88
3d2c4050 : dxgkrnl!DpiDxgkDdiSetPowerState+0x5a
ffffd7081041f680 fffff802
5e5b4e34 : 0000000000000000 ffff8e88
3f0a5a20 0000000000000004 00000000
00000004 : dxgkrnl!DpiFdoSetAdapterPowerState+0x34e
ffffd7081041f740 fffff802
5e5b4441 : ffffd7081041f801 00000000
00000004 ffff8e8839dc1bd0 ffff8e88
3f0a5c10 : dxgkrnl!DpiFdoHandleDevicePower+0x134
ffffd7081041f7e0 fffff802
5e5b5991 : ffff8e883f0a5a20 ffff8e88
3d2c3180 ffff8e883d2c3030 ffff8e88
3d2c3030 : dxgkrnl!DpiFdoDispatchPower+0x21
ffffd7081041f810 fffff802
637111cc : ffff8e883d0b4000 ffffd708
1041f9d9 ffff8e883d0b4000 ffff8e88
3f0a5c10 : dxgkrnl!DpiDispatchPower+0xe1
ffffd7081041f930 fffff802
637102d4 : ffff8e883d2c3030 00000000
00000000 ffff8e883d2c3030 ffff8e88
3f0a5a20 : nvlddmkm+0xd811cc
ffffd7081041fa40 fffff802
45d9ce99 : ffff8e8838cf0040 ffffd708
1041faf0 ffff8e883f0a5a20 ffff8e88
00000000 : nvlddmkm+0xd802d4
ffffd7081041fa70 fffff802
45cf53b5 : 0000000000000000 fffff802
45d9ccc0 0000000000000000 00000000
000000f9 : nt!PopIrpWorker+0x1d9
ffffd7081041fb10 fffff802
45dfe348 : ffffdd01bcdc7180 ffff8e88
38cf0040 fffff80245cf5360 d0ec8148
ffffff30 : nt!PspSystemThreadStartup+0x55
ffffd7081041fb60 00000000
00000000 : ffffd70810420000 ffffd708
10419000 0000000000000000 00000000
00000000 : nt!KiStartSystemThread+0x28
STACK_COMMAND: .thread 0xffff8e8838cf0040 ; kb
SYMBOL_NAME: nvlddmkm+84c34
MODULE_NAME: nvlddmkm
IMAGE_NAME: nvlddmkm.sys
BUCKET_ID_FUNC_OFFSET: 84c34
FAILURE_BUCKET_ID: 0x9F_3_DXG_POWER_IRP_TIMEOUT_nvlddmkm!unknown_function
OS_VERSION: 10.0.19041.1
BUILDLAB_STR: vb_release
OSPLATFORM_TYPE: x64
OSNAME: Windows 10
FAILURE_ID_HASH: {8cc60268-7d19-e594-85e0-3d3e4d0907af}
Followup: MachineOwner
0: kd> !blackboxbsd
Version: 176
Product type: 1
Auto advanced boot: FALSE
Advanced boot menu timeout: 30
Last boot succeeded: TRUE
Last boot shutdown: FALSE
Sleep in progrees: FALSE
Power button timestamp: 0
System running: TRUE
Connected standby in progress: FALSE
User shutdown in progress: FALSE
System shutdown in progress: FALSE
Sleep in progress: 0
Connected standby scenario instance id: 0
Connected standby entry reason: 0
Connected standby exit reason: 0
System sleep transitions to on: 0
Last reference time: 0x1d75b8ad3abff0b
Last reference time checksum: 0x4c8399eb
Last update boot id: 183
Boot attempt count: 2
Last boot checkpoint: TRUE
Checksum: 0x7f
Last boot id: 183
Last successful shutdown boot id: 173
Last reported abnormal shutdown boot id: 182
Error info boot id: 0
Error info repeat count: 0
Error info other error count: 0
Error info code: 0
Error info other error count: 0
Power button last press time: 0
Power button cumulative press count: 0
Power button last press boot id: 0
Power button last power watchdog stage: 0
Power button watchdog armed: FALSE
Power button shutdown in progress: FALSE
Power button last release time: 0
Power button cumulative release count: 0
Power button last release boot id: 0
Power button error count: 0
Power button current connected standby phase: 0
Power button transition latest checkpoint id: 0
Power button transition latest checkpoint type: 0
Power button transition latest checkpoint sequence number: 0
0: kd> !blackboxntfs
NTFS Blackbox Data
0 Slow I/O Timeout Records Found
0 Oplock Break Timeout Records Found
0: kd> !blackboxpnp
PnpActivityId : {00000000-0000-0000-0000-000000000000}
PnpActivityTime : 132675366031160594
PnpEventInformation: 3
PnpEventInProgress : 0
PnpProblemCode : 24
PnpVetoType : 0
DeviceId : SW{96E080C7-143C-11D1-B40F-00A0C9223196}{3C0D501A-140B-11D1-B40F-00A0C9223196}
VetoString :