Powering off Guest without Graphics Controller causes Unresponsive Behavior -> fixed in 6.0.8 and 5.2.30

[TurtAlgo]

I have set the following options on Virtual Machine(s):

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Graphics Controller: None
Graphics Memory: 0 MB

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Powering off a machine will cause VirtualBox 6.0.6 to behave erratically and unresponsively. Configuring the guest with 5MB Video Memory and a Graphics Controller will allow proper function.

VirtualBox starts the guest again, and reports a memory error, where I have to end the process to fix this issue. I attempted to power off a couple dozen Headless Virtual Machines at once and my Host hung from attempting to restart the Virtual Machines. They also opened up the interface.

I am also having an issue where clicking "Show" on a guest without a Graphics Controller causes issues.

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Downgraded to VirtualBox 6.0.4 to fix this issue on a production server. Multiple Virtual Machines power off as expected.

Perhaps configuring a guest with "invalid settings" may be the issue, but I have had no issues with running a guest without a graphics controller. I am running a full box with 200+ machines where I believe there may be unnecessary overhead with a Graphics Adapter.

[Sage Pointer]

Log file

[Sage Pointer]

Have the same issue. When i set graphics controller to None, it crashes on stopping virtual machine. Any other graphics controller doesn't cause access violation. In my test case, i created even a blank machine, unchecked almost everything to make minimal, and it still crashed if graphics controller is set to None and doesn't if graphic controller is set to anything else.

00:00:10.880349 Changing the VM state from 'RUNNING' to 'SUSPENDING'
00:00:10.924815 PDMR3Suspend: 44 367 936 ns run time
00:00:10.924890 Changing the VM state from 'SUSPENDING' to 'SUSPENDED'
00:00:10.924946 Console: Machine state changed to 'Paused'
00:00:12.264401 GUI: Request for close-action to power VM off.
00:00:12.264433 GUI: Passing request to power VM off from machine-logic to UI session.
00:00:12.264443 GUI: Powering VM down on UI session power off request...
00:00:12.265109 Console: Machine state changed to 'Stopping'
00:00:12.265840 Console::powerDown(): A request to power off the VM has been issued (mMachineState=Stopping, InUninit=0)
00:00:12.266362 
00:00:12.266363 !!! rtR3WinUnhandledXcptFilter caught an exception on thread 00000000000015a8!!!
00:00:12.266383 
00:00:12.266383 ExceptionCode=0xc0000005 ExceptionFlags=0x00000000 ExceptionAddress=00007ffb4816f171
00:00:12.266394 ExceptionInformation[0]=0000000000000000
00:00:12.266403 ExceptionInformation[1]=0000000000000010
00:00:12.266412 
00:00:12.266412 cs:rip=0033:00007ffb4816f171
00:00:12.266423 ss:rsp=002b:000000000b63f470 rbp=0000000000000000
00:00:12.266433 rax=0000000000000000 rcx=000000000274c634 rdx=0000000000000001 rbx=000000000274c440
00:00:12.266455 rsi=0000000000000000 rdi=0000000000000001 rsp=000000000b63f470 rbp=0000000000000000
00:00:12.266467 r8 =0000000000000000 r9 =0000000000000000 r10=0000000000000000 r11=0000000000000246
00:00:12.266478 r12=00007ffb4831e350 r13=0000000000000000 r14=0000000000000000 r15=0000000000000000
00:00:12.266488 ds=002b es=002b fs=0053 gs=002b eflags=00010246
00:00:12.266498 p1home=00000000062465f0 p2home=0000000000000000 pe3home=000000000274c440
00:00:12.266508 p4home=00000000012b4980 p5home=00000000012b0d20 pe6home=00007ffb00000009
00:00:12.266517    LastBranchToRip=0000000000000000    LastBranchFromRip=0000000000000000
00:00:12.266527 LastExceptionToRip=0000000000000000 LastExceptionFromRip=0000000000000000

[sunlover]

Thanks for reporting the problem. It will be fixed in the next release. Also the fix will be in testbuilds 6.0.x revision 130321 or newer (when they will be available). See https://www.virtualbox.org/wiki/Testbuilds