I removed the virtual machines to exclude that as a source of error. Now running my program that tries to launch a VM called Xubuntu fails as expected when non-root (the API tells there is no such machine and that shows up in the VBoxSVC.log), while root fails and VBoxSVC.log does not contain anything special. I can continue on for now working as non root, but eventually I need to launch my binary from a nodejs process which needs to be root to bind to the TCP port (I could however launch the slaves under other users but I'd like to sort out why this happens). Is there any way to enable extended logging in the VBoxSVC.log? Exporting BOXSVC_RELEASE_LOG=main.e.l.f+gui.e.l.f did not change anything.
Logs as non root: VBoxSVC.log: VirtualBox XPCOM Server 5.0.12 r104815 linux.amd64 (Dec 18 2015 17:08:04) release log 00:00:00.000218 main Log opened 2016-04-23T14:00:47.617485000Z 00:00:00.000220 main Build Type: release 00:00:00.000222 main OS Product: Linux 00:00:00.000223 main OS Release: 3.16.0-30-generic 00:00:00.000223 main OS Version: #40~14.04.1-Ubuntu SMP Thu Jan 15 17:43:14 UTC 2015 00:00:00.000254 main DMI Product Name: Z9PE-D16 Series 00:00:00.000260 main DMI Product Version: 1.0X 00:00:00.000330 main Host RAM: 15995MB total, 15725MB available 00:00:00.000333 main Executable: /usr/lib/virtualbox/VBoxSVC 00:00:00.000333 main Process ID: 2873 00:00:00.000334 main Package type: LINUX_64BITS_UBUNTU_14_04 00:00:00.103915 nspr-2 Home directory: '/home/rudolfs/.config/VirtualBox' 00:00:00.104076 nspr-2 Loading settings file "/home/rudolfs/.config/VirtualBox/VirtualBox.xml" with version "1.12-linux" 00:00:00.109599 nspr-2 HostDnsMonitor: old information 00:00:00.109609 nspr-2 no server entries 00:00:00.109614 nspr-2 no search string entries 00:00:00.109616 nspr-2 no domain set 00:00:00.109618 nspr-2 HostDnsMonitor: new information 00:00:00.109620 nspr-2 server 1: 192.168.1.1 00:00:00.109623 nspr-2 no search string entries 00:00:00.109625 nspr-2 no domain set 00:00:00.109630 nspr-2 HostDnsMonitorProxy::notify 00:00:00.110588 nspr-2 VD: VDInit finished 00:00:00.112975 nspr-2 ERROR [COM]: aRC=VBOX_E_OBJECT_NOT_FOUND (0x80bb0001) aIID={0169423f-46b4-cde9-91af-1e9d5b6cd945} aComponent={VirtualBoxWrap} aText={Could not find a registered machine named 'Xubuntu'}, preserve=false aResultDetail=0 00:00:05.612083 Watcher ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={0169423f-46b4-cde9-91af-1e9d5b6cd945} aComponent={VirtualBoxWrap} aText={The object is not ready}, preserve=false aResultDetail=0 00:00:10.114131 main {00007f6124012b80} HostPowerServiceLinux::~HostPowerServiceLinux: RTThreadWait() for 5000 ms failed with VERR_TIMEOUT My log: [23.04.2016 17:00:47.600] === Start (PID: 2864) === [23.04.2016 17:00:47.741] ../../../Sources/VirtualBoxSource/VirtualBoxSource.cpp(59): could not find virtual machine Xubuntu(0x80bb0001) [23.04.2016 17:00:47.754] === Stop === Logs as root: VBoxSVC.log: VirtualBox XPCOM Server 5.0.12 r104815 linux.amd64 (Dec 18 2015 17:08:04) release log 00:00:00.000430 main Log opened 2016-04-23T14:02:52.309751000Z 00:00:00.000431 main Build Type: release 00:00:00.000433 main OS Product: Linux 00:00:00.000434 main OS Release: 3.16.0-30-generic 00:00:00.000434 main OS Version: #40~14.04.1-Ubuntu SMP Thu Jan 15 17:43:14 UTC 2015 00:00:00.000455 main DMI Product Name: Z9PE-D16 Series 00:00:00.000460 main DMI Product Version: 1.0X 00:00:00.000517 main Host RAM: 15995MB total, 15724MB available 00:00:00.000520 main Executable: /usr/lib/virtualbox/VBoxSVC 00:00:00.000520 main Process ID: 2902 00:00:00.000521 main Package type: LINUX_64BITS_UBUNTU_14_04 00:00:00.103713 nspr-2 Home directory: '/root/.config/VirtualBox' 00:00:00.103891 nspr-2 Loading settings file "/root/.config/VirtualBox/VirtualBox.xml" with version "1.12-linux" 00:00:00.106584 nspr-2 Successfully initialised host USB using sysfs 00:00:00.111953 nspr-2 HostDnsMonitor: old information 00:00:00.111964 nspr-2 no server entries 00:00:00.111968 nspr-2 no search string entries 00:00:00.111971 nspr-2 no domain set 00:00:00.111973 nspr-2 HostDnsMonitor: new information 00:00:00.111976 nspr-2 server 1: 192.168.1.1 00:00:00.111979 nspr-2 no search string entries 00:00:00.111981 nspr-2 no domain set 00:00:00.111986 nspr-2 HostDnsMonitorProxy::notify 00:00:00.113053 nspr-2 VD: VDInit finished 00:00:05.614453 Watcher ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={0169423f-46b4-cde9-91af-1e9d5b6cd945} aComponent={VirtualBoxWrap} aText={The object is not ready}, preserve=false aResultDetail=0 00:00:10.124637 main {00007f5ebc014fb0} HostPowerServiceLinux::~HostPowerServiceLinux: RTThreadWait() for 5000 ms failed with VERR_TIMEOUT My log: [23.04.2016 17:02:52.295] === Start (PID: 2891) === [23.04.2016 17:02:52.433] ../../../Sources/VirtualBoxSource/VirtualBoxSource.cpp(31): failed to create VirtualBox API instance(0x80004005) [23.04.2016 17:02:52.447] === Stop === 2016-04-23 15:49 GMT+03:00 Rūdolfs Bundulis <rudolfs.bundu...@gmail.com>: > Thanks for pointing out the location. I opened the file just after the > error but it did no contain anything interresting: > > VirtualBox XPCOM Server 5.0.12 r104815 linux.amd64 (Dec 18 2015 17:08:04) > release log > 00:00:00.003705 main Log opened 2016-04-23T12:37:03.945428000Z > 00:00:00.003707 main Build Type: release > 00:00:00.003710 main OS Product: Linux > 00:00:00.003710 main OS Release: 3.16.0-30-generic > 00:00:00.003711 main OS Version: #40~14.04.1-Ubuntu SMP Thu Jan 15 > 17:43:14 UTC 2015 > 00:00:00.003739 main DMI Product Name: Z9PE-D16 Series > 00:00:00.003746 main DMI Product Version: 1.0X > 00:00:00.003823 main Host RAM: 15995MB total, 15708MB available > 00:00:00.003826 main Executable: /usr/lib/virtualbox/VBoxSVC > 00:00:00.003827 main Process ID: 2428 > 00:00:00.003827 main Package type: LINUX_64BITS_UBUNTU_14_04 > 00:00:00.110860 nspr-2 Home directory: '/root/.config/VirtualBox' > 00:00:00.111175 nspr-2 Loading settings file > "/root/.config/VirtualBox/VirtualBox.xml" with version "1.12-linux" > 00:00:00.117237 nspr-2 Successfully initialised host USB using sysfs > 00:00:00.124953 nspr-2 HostDnsMonitor: old information > 00:00:00.124964 nspr-2 no server entries > 00:00:00.124969 nspr-2 no search string entries > 00:00:00.124971 nspr-2 no domain set > 00:00:00.124973 nspr-2 HostDnsMonitor: new information > 00:00:00.124975 nspr-2 server 1: 192.168.1.1 > 00:00:00.124978 nspr-2 no search string entries > 00:00:00.124980 nspr-2 no domain set > 00:00:00.124984 nspr-2 HostDnsMonitorProxy::notify > 00:00:00.130331 nspr-2 VD: VDInit finished > 00:00:00.140840 nspr-2 Loading settings file "/root/VirtualBox > VMs/Windows 7 XPDM/Windows 7 XPDM.vbox" with version "1.12-linux" > 00:00:00.143291 nspr-2 Loading settings file "/root/VirtualBox > VMs/Xubuntu/Xubuntu.vbox" with version "1.14-linux" > 00:00:05.154728 main ERROR [COM]: aRC=VBOX_E_OBJECT_IN_USE > (0x80bb000c) aIID={4afe423b-43e0-e9d0-82e8-ceb307940dda} > aComponent={MediumWrap} aText={Medium '/root/VirtualBox VMs/Windows 7 > XPDM/Windows 7 XPDM-disk2.vmdk' cannot be closed because it is still > attached to 1 virtual machines}, preserve=false aResultDetail=0 > 00:00:05.154850 main ERROR [COM]: aRC=VBOX_E_OBJECT_IN_USE > (0x80bb000c) aIID={4afe423b-43e0-e9d0-82e8-ceb307940dda} > aComponent={MediumWrap} aText={Medium > '/tmp/DisplayWall/Build/Linux/Debug/Xubuntu.vdi' cannot be closed because > it is still attached to 1 virtual machines}, preserve=false aResultDetail=0 > 00:00:05.644170 Watcher ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) > aIID={0169423f-46b4-cde9-91af-1e9d5b6cd945} aComponent={VirtualBoxWrap} > aText={The object is not ready}, preserve=false aResultDetail=0 > 00:00:10.159690 main {00007f97f0015160} > HostPowerServiceLinux::~HostPowerServiceLinux: RTThreadWait() for 5000 ms > failed with VERR_TIMEOUT > > My error occurs on 15:37:04 so the trailing errors should not be the > cause, will investigate further but thanks for the help. > > [23.04.2016 15:37:03.894] === Start (PID: 2417) === > [23.04.2016 15:37:04.099] > ../../../Sources/VirtualBoxSource/VirtualBoxSource.cpp(31): failed to > create VirtualBox API instance(0x80004005) > [23.04.2016 15:37:04.102] === Stop === > > >
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