Re: Bug in vboxguest: After commit Merge tag 'char-misc-4.17-rc3'

[Hans de Goede]

Hi,

On 08-05-18 21:41, damian wrote:
> On Tue, 08. May 13:42, Hans de Goede wrote:
> > Hi Damian,
> >
> > On 02-05-18 22:46, damian wrote:
> > > Hello Greg,
> > >
> > > it is PATCH 3 virt: vbox: Use __get_free_pages insteas of kmalloc for DMA32 memory.
> >
> > Thank you for the bug report, I've tried to reproduce this problem
> > but for me everything works fine.
> >
> > Does your virtual-machine have more then 4G of RAM configured for its
> > use?  If yes then what is likely happening is that you also have
> > the out-of-tree version of the vboxguest modules installed and prior
> > to the commit in question the out of tree version of the driver is
> > loading, because before that commit the vboxguest driver in the
> > mainline kernel fails to load on machines with more then 4G.
> >
> > Or alternatively before the commit in question you may not have
> > any version of the vboxguest driver loaded.
> >
> > Using the upstream version of the driver should not make a noticeable
> > difference, but before the vboxguest driver became a part of the
> > mainline kernel the virtualbox upstream developers have done a
> > cleanup / redesign of the userspace API of the vboxguest driver,
> > so the vboxguest driver will only work with recent virtualbox-guest-additions
> > and since you are using Ubuntu 16.04 chances are that you are
> > using that with Ubuntu's quite old bundled virtualbox-guest-additions
> > which will not work with the new driver and may be causing this
> > issue.
> >
> > Can you try upgrading your virtualbox-guest-additions to 5.2.10
> > please?
> >
> > Also if the above does not help, a couple of follow up
> > questions to help this pin down further:
> >
> > 1) Are you using vbox's 3d pass through functionality
> > 2) Which desktop-environment are you using?
> >
> > Regards,
> >
> > Hans
>
> Hi Hans,
>
> i will check my configutation and will come back
> At the moment i dont use use the virtualbox-guest-additions, i use the driver from the staging area.

Ah I see, you may still have the Ubuntu pkg for them installed though,
which may be an old version which actually starts to try and do stuff
now that there is a vboxguest driver in mainline too, but that old
version does not support the new, stable API as merged into the
mainline.

So if you don't care about the add-ons instead of upgrading yopu
can also remove the Ubuntu pkg for them.

Regards,

Hans