Re: Fun with upgrades - not

[Alexander Kobel]

Hi Phil,

I had a bit of trouble to parse your setup description. IIUC, you used 
to have a machine with

- Ubuntu 10.04 running natively as host
  - VirtualBox environment on this one
    - LilyDev/Ubuntu 12.04 VM
    - Windows Vista VM
    - Windows 7 VM

and want to go to

- Ubuntu 14.04. running natively as host
  - VirtualBox environment on this one
    - possibly a LilyDev/Ubuntu 12.04 VM ?
    - Windows Vista VM
    - Windows 7 VM

Correct? Or will you just install a Win7 on your shiny new piece of 
hardware and keep Ubuntu on the old one?

W.r.t. the mountpoints, have a look at

http://askubuntu.com/questions/336518/why-has-ubuntu-moved-the-default-mount-points#336580
for an explanation and

http://askubuntu.com/questions/214646/how-to-configure-the-default-automount-location/276670#276670
for a way to go back to the pre-10.10-behavior (untested though, I'm 
quite happy with the new behavior on Arch Linux here).
That different users cannot access the drive with the new default is the 
intended feature, not a bug, though it might come unexpected.

For a quick-and-dirty solution, you can check whether symlinks (con: not 
a "proper" directory; pro: simple and persistent over reboots) or 
bind-mounts (pro: proper directory; con: more difficult to setup, in 
particular if you want them for automounted drives) serve the same 
purpose. Also, mounting a device multiple times as Wol suggested is no 
problem at all.


As far as GUB is concerned, I have no idea, sorry - never used that. 
However, compiling Lily natively on my platform (whether Arch, Debian or 
Ubuntu) always worked like a charm for me, using all the build 
dependencies from the repositories, so I'd strongly suggest to at least 
give it a shot. However, my last proper use of Ubuntu was around 2013; 
I'm not sure if there are build dependencies for recent LilyPond that 
cannot be satisfied from 14.04s upstream repositories.
Is there a specific reason why you don't want to go to 16.04 directly?


Finding out why the VM became slow sounds difficult. I am a VirtualBox 
user, too, but never experienced severe problems - on the other hand, I 
basically use it once a year for the tax declaration, and even less 
often to buy sheet music on sites which ship Scorch files. In contrast, 
Lightroom sounds like an application that might be interested in direct 
access to the graphics hardware. I assume that there comes a newer 
VirtualBox with 14.04 than the one on 10.04; I suggest to double-check 
whether there is a setting that enables or disables GPU support and/or 
PCI passthrough. The explanations here

https://blogs.oracle.com/fatbloke/entry/3d_acceleration_with_ubuntu_guests
might still be valid (don't miss out on the vboxvideo module part, could 
be important...).


HTH,
Alexander


On 2016-06-28 16:50, Phil Holmes wrote:
> Last week I decided to bite the bullet and upgrade from Ubuntu 10.04 to a
> more recent version.  I downloaded an upgrade to 12.04, and then used that
> to do an online upgrade to 14.04.  As a result of this, I lost most of the
> applications needed to build LilyPond.  I've grabbed a number of then with
> the software installer or apt, but gave that up for a while whilst I
> needed the machine for another purpose.
>
> This was to run a Windows 7 VM - I use this with Adobe Lightroom 6 (which
> won't run on my Vista desktop) for editing my photos.  So I installed the
> latest Oracle VirtualBox and discovered that 14.04 mounts its disks in
> media/username, meaning that VB could not find the image of my VM.  I
> hacked the set up file by hand, and got the VM running.  Problem is, it
> runs like a complete drain, taking about two minutes to move between
> photos.  The VM on 10.04 was instantaneous.  No idea why this should be,
> but I got so p**sed of with it that I've ordered a new PC just for my
> photography.
>
> So I'm back to thinking about what to do with the Linux installation.  An
> option would be to start from scratch with the latest version of LilyDev.
> My concern is how this would mount my two non-system disks: a 2TB hard
> drive and an SSD.  With 14.04, if I access my SSD from my "patchy" user,
> my mail "phil" uer can't see the drive since it seems to mount at
> media/patchy.  I'm also not sure how I would best go about GUB builds.
> Previously I had a 64 bit Ubuntu 12.04 VM running on the 10.04 machine
> from a "gub" user.  Not sure whether it would be best to save the VM image
> and try to transfer it to the new build, or forget about it and start from
> scratch again.  Also not sure whether GUB will run OK just on the base
> LilyDev build, rather than in a VM?  I'm concerned that if Windows is so
> slow on a VM on 14.04, perhaps the GUB Linux will have the same problem?
>
> Advice from anyone who knows what they're talking about even slightly
> would be welcome.
>
>
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