I am on Debian Stretch. Today I tried opening the VirtualBox VM Manager and it doesn't start at all. If I try to run it from a terminal, it gives me lots of XCB errors but nothing else that can help me find the problem.
I've had this problem before, and it required a reinstall of the entire system. I really would not like to reinstall my system. I've tried reinstalling VirtualBox from the Debian 9 package on the website, and I've tried reinstalling it from the stretch-backports repository. Neither of these have worked. I cannot even useQt WARNING: QXcbConnection: XCB error: 3 (BadWindow), sequence: 2485, resource id: 65011964, major code: 18 (ChangeProperty), minor code: 0 Qt WARNING: QXcbConnection: XCB error: 3 (BadWindow), sequence: 2486, resource id: 65011964, major code: 18 (ChangeProperty), minor code: 0 Qt WARNING: QXcbConnection: XCB error: 3 (BadWindow), sequence: 2487, resource id: 65011964, major code: 18 (ChangeProperty), minor code: 0 Qt WARNING: QXcbConnection: XCB error: 3 (BadWindow), sequence: 2489, resource id: 65011964, major code: 18 (ChangeProperty), minor code: 0 Qt WARNING: QXcbConnection: XCB error: 3 (BadWindow), sequence: 2490, resource id: 65011964, major code: 18 (ChangeProperty), minor code: 0 Qt WARNING: QXcbConnection: XCB error: 3 (BadWindow), sequence: 2491, resource id: 65011964, major code: 18 (ChangeProperty), minor code: 0 Qt WARNING: QXcbConnection: XCB error: 3 (BadWindow), sequence: 2492, resource id: 65011964, major code: 18 (ChangeProperty), minor code: 0 Qt WARNING: QXcbConnection: XCB error: 3 (BadWindow), sequence: 2496, resource id: 65011964, major code: 2 (ChangeWindowAttributes), minor code: 0 Qt WARNING: QXcbConnection: XCB error: 3 (BadWindow), sequence: 2497, resource id: 65011964, major code: 18 (ChangeProperty), minor code: 0 Qt WARNING: QXcbConnection: XCB error: 3 (BadWindow), sequence: 2500, resource id: 65011964, major code: 18 (ChangeProperty), minor code: 0 Qt WARNING: QXcbConnection: XCB error: 3 (BadWindow), sequence: 2501, resource id: 65011964, major code: 20 (GetProperty), minor code: 0 Qt WARNING: QXcbConnection: XCB error: 3 (BadWindow), sequence: 2505, resource id: 65011964, major code: 18 (ChangeProperty), minor code: 0 Qt WARNING: QXcbConnection: XCB error: 3 (BadWindow), sequence: 2506, resource id: 65011964, major code: 18 (ChangeProperty), minor code: 0 Qt WARNING: QWidget::setMinimumSize: (/UIGDetailsView) Negative sizes (-119304646,0) are not possible Qt WARNING: QWidget::setMinimumSize: (/UISelectorWindow) The largest allowed size is (16777215,16777215) Qt WARNING: QWidget::setMinimumSize: (/UISelectorWindow) The largest allowed size is (16777215,16777215) Qt WARNING: QWidget::setMinimumSize: (/UISelectorWindow) The largest allowed size is (16777215,16777215) Qt WARNING: QXcbConnection: XCB error: 3 (BadWindow), sequence: 2517, resource id: 65011717, major code: 10 (UnmapWindow), minor code: 0 Qt WARNING: QXcbConnection: XCB error: 3 (BadWindow), sequence: 2520, resource id: 65011717, major code: 4 (DestroyWindow), minor code: 0 Qt WARNING: QXcbConnection: XCB error: 3 (BadWindow), sequence: 2521, resource id: 65011725, major code: 10 (UnmapWindow), minor code: 0 Qt WARNING: QXcbConnection: XCB error: 3 (BadWindow), sequence: 2524, resource id: 65011725, major code: 4 (DestroyWindow), minor code: 0
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VBoxManage startvm "myvm"