Correction: Disabling and re-enabling Mir; Opinion: Release Mir with 13.10

Jimmy Sjölund jimmy at
Fri Aug 16 20:02:33 UTC 2013

On Fri, Aug 16, 2013 at 9:34 PM, Richard Elkins <richard.elkins at>wrote:

>  Sorry.  Enabling is almost the same set of steps: remove the existing
> '#' in step 3 is the only difference.  I must be getting old.  Pity.
> Another point from the same 2013-08-15 discussion, I'd still prefer an
> enable=Y/N flag in the file mentioned below.  It's just much clearer in
> terms of intent.  But, I'm okay with what we have.
> On 08/16/2013 02:22 PM, Richard Elkins wrote:
> One person (forgot who) was running with Mir for a bit and was unhappy
> with the experience.  This person did not want to go through the bother of
> reinstalling their PC with something else + catchup + customizations as
> they wanted to keep on trying the preview of Xubuntu 13.10.  Maybe someone
> else feels the same?
> So, based on the collective conversation we had on 2013-08-15, this will
> let you disable or re-enable Mir:
> Disable:
> 1) Open a terminal window.
> 2) sudo  *your-favorite-text-editor*
> /etc/lightdm/lightdm.conf.d/10-unity-system-compositor.conf
> 3) On the line which reads, type=unity, insert an '#' in column 1, making
> the line a comment.
> 4) Save and exit.
> 5) sudo reboot
> Enabling is almost the same set of steps (put the '#' back in step 3).
> The instructions on Jono's blog,
, mention
two rows to comment:
If you do have problems with Mir and want to start a normal X server,
simply edit /etc/lightdm/lightdm.conf.d/10-unity-system-compositor.conf and
comment out the second and third lines:

Now restart LightDM and you are good to go. Uncomment these lines to go
back to Mir.

I don't know what the second line actually does or if they are redundant
once the type=unity is commented out?

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