I compiled VirtualBox-6.0.8 with disabling-hardening and debugging on Ubuntu 18.04 (kernel: 4.19.50).
Almost everything is fine, but I have a problem because I can't save the state of the working virtual machine. When I want to save the state of the virtual machine instead of Power off , I get a window with the message "Saving the execution state of the virtual machine ...", when the window was closed in the terminal, when VBox has run, I received warning :
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WARNING: failed to send RELEASE event, file /home/username/VirtualBox-6.0.8/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/src/ipcDConnectService.cpp, line 2338
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00:01:06.113179
00:01:06.113181 !!Assertion Failed!!
00:01:06.113181 Expression: pDev->hUrbIoThread != NIL_RTTHREAD
00:01:06.113182 Location : /home/username/VirtualBox-6.0.8/src/VBox/Devices/USB/VUSBDevice.cpp(1635) int vusbDevIoThreadExecV(PVUSBDEV, uint32_t, PFNRT, unsigned int, __va_list_tag*)
00:01:06.113200 Stack :
00:01:06.113201 00007f8c7bf30c73 VBoxRT.so!RTAssertMsg2V+0x51f (rva:0x262c73)
00:01:06.113201
Does anyone have a similar problem? On which component should I focus, where should I look for problems?