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

[Richard Elkins]

Thanks, Jimmy.  I missed that blog entry.

The second line tells the process which read the configuration file 
which executable to invoke.  In this case, it is a shell script 
`unity-system-compositor.sleep` which simply sleeps a bit and then 
invokes the `unity-system-compositor` executable.  You can find them 
both in /usr/sbin.

Only the first line (type=unity) need be commented out in order to 
invoke X from LightDM without attempting Mir.


On 08/16/2013 03:02 PM, Jimmy Sjölund wrote:
> On Fri, Aug 16, 2013 at 9:34 PM, Richard Elkins 
> <richard.elkins at gmail.com <mailto:richard.elkins at gmail.com>> 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, 
> http://www.jonobacon.org/2013/08/15/mir-update-and-testing-mir-in-ubuntu-13-10/ , 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:
>
> [SeatDefaults]
> #type=unity
> #unity-compositor-command=unity-system-compositor.sleep
> 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?
>
> /Jimmy
>
>
>

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