[vbox-dev] Unable to start VBox

[John Frankish]

> > After compiling VirtualBox-5.1.22 for linux, I am unable to start it.
> >
> > I'd be grateful for any suggestions on how to fix this.
> >
> > ----------
> > snip
> >
> don't ask me why only strace shows the message (which is written to 
> stderr, so should be visible when you run VirtualBox by hand):
> 
In fact now that I try again, I see that message (i965, swrast) only seems to have appeared when I ran VirtualBox with sudo

> VirtualBox: Error -10 in SUPR3HardenedMain!
> VirtualBox: Effective UID is not root (euid=1001 egid=50 uid=1001 gid=50)
> 
> VirtualBox: Tip! It may help to reinstall VirtualBox.
> 
> Error -10 is "access denied", and the next line complains that the 
> executable isn't installed as setuid root.
> 
..but /usr/local/lib/virtualbox/VirtualBox is suid root...

> No idea which "make install" you're talking about... VirtualBox can't be 
> installed in such a way. Must be a VERY strange recipe you're following 
> (might have been applicable to some old 4.x builds, but certainly not to 
> anything recent).
>
Indeed, how can I have forgotten that the virtualbox source does not work like any other and I had to install it by hand :P

> BTW, what's that %U rubbish in the command line? Looks wrong to me 
> (smells like some desktop env parameter placeholder), but on the other 
> hand shouldn't do too much harm. I'd leave it out.
> 
That "rubbish" was taken from the virtualbox desktop file, but you're right, it works (or doesn't work) just as well without it.