<s>
Mir	B-Language
is	O
a	O
computer	O
display	O
server	O
and	O
,	O
recently	O
,	O
a	O
Wayland	B-Language
compositor	O
for	O
the	O
Linux	B-Application
operating	I-Application
system	I-Application
that	O
is	O
under	O
development	O
by	O
Canonical	O
Ltd	O
.	O
</s>
<s>
It	O
was	O
planned	O
to	O
replace	O
the	O
currently	O
used	O
X	B-Operating_System
Window	I-Operating_System
System	I-Operating_System
for	O
Ubuntu	B-Operating_System
;	O
however	O
,	O
the	O
plan	O
changed	O
and	O
Mutter	B-Language
was	O
adopted	O
as	O
part	O
of	O
GNOME	B-Language
Shell	I-Language
.	O
</s>
<s>
Mir	B-Language
was	O
announced	O
by	O
Canonical	O
on	O
4	O
March	O
2013	O
as	O
part	O
of	O
the	O
development	O
of	O
Unity	B-Device
8	I-Device
,	O
intended	O
as	O
the	O
next	O
generation	O
for	O
the	O
Unity	B-Device
user	I-Device
interface	I-Device
.	O
</s>
<s>
Four	O
years	O
later	O
Unity	B-Device
8	I-Device
was	O
dropped	O
although	O
Mir	B-Language
's	O
development	O
continued	O
for	O
Internet	B-Operating_System
of	I-Operating_System
Things	I-Operating_System
(	O
IoT	B-Operating_System
)	O
applications	O
.	O
</s>
<s>
Mir	B-Language
is	O
built	O
on	O
EGL	B-Application
and	O
uses	O
some	O
of	O
the	O
infrastructure	O
originally	O
developed	O
for	O
Wayland	B-Language
such	O
as	O
Mesa	B-Application
's	I-Application
EGL	B-Application
implementation	O
and	O
Jolla	B-Operating_System
's	I-Operating_System
libhybris	B-Application
.	O
</s>
<s>
The	O
compatibility	O
layer	O
for	O
X	B-Operating_System
,	O
XMir	B-Language
,	O
is	O
based	O
on	O
XWayland	B-Application
.	O
</s>
<s>
Other	O
parts	O
of	O
the	O
infrastructure	O
used	O
by	O
Mir	B-Language
originate	O
from	O
Android	B-Application
.	O
</s>
<s>
These	O
parts	O
include	O
Google	B-Application
's	I-Application
Protocol	B-Protocol
Buffers	I-Protocol
,	O
and	O
previously	O
included	O
Android	B-Application
's	O
input	O
stack	O
,	O
which	O
has	O
since	O
been	O
replaced	O
by	O
Wayland	B-Language
's	O
libinput	B-Language
,	O
prior	O
to	O
the	O
end	O
of	O
2015	O
.	O
</s>
<s>
An	O
implementation	O
detail	O
in	O
memory	B-General_Concept
management	I-General_Concept
shared	O
with	O
Android	B-Application
is	O
the	O
use	O
of	O
server-allocated	O
buffers	O
which	O
Canonical	O
employee	O
Christopher	O
Halse	O
Rogers	O
claims	O
to	O
be	O
a	O
requirement	O
for	O
"	O
the	O
ARM	O
world	O
and	O
Android	B-Application
graphics	O
stack	O
"	O
.	O
</s>
<s>
it	O
has	O
basic	O
Wayland	B-Language
support	O
.	O
</s>
<s>
,	O
the	O
only	O
announced	O
desktop	O
environment	O
with	O
native	O
support	O
for	O
Mir	B-Language
was	O
Canonical	O
's	O
Unity	B-Device
8	I-Device
.	O
</s>
<s>
No	O
other	O
Linux	B-Application
distribution	I-Application
announced	O
plans	O
to	O
adopt	O
Mir	B-Language
as	O
default	O
display	O
server	O
.	O
</s>
<s>
On	O
23	O
July	O
2013	O
,	O
Compiz	B-Language
developer	O
Sam	O
Spilsbury	O
had	O
announced	O
a	O
proof-of-concept	O
port	O
of	O
XBMC	B-Application
to	O
Mir	B-Language
,	O
based	O
on	O
the	O
previous	O
proof-of-concept	O
port	O
of	O
XBMC	B-Application
to	O
Wayland	B-Language
.	O
</s>
<s>
On	O
the	O
same	O
day	O
Canonical	O
developer	O
Oliver	O
Ries	O
had	O
confirmed	O
that	O
"	O
this	O
is	O
the	O
first	O
native	O
Mir	B-Language
client	O
out	O
in	O
the	O
wild	O
"	O
.	O
</s>
<s>
Among	O
Ubuntu	B-Operating_System
derivatives	O
using	O
a	O
non-Unity	O
environment	O
,	O
Xubuntu	B-Application
developers	O
had	O
announced	O
in	O
early	O
August	O
2013	O
that	O
they	O
would	O
evaluate	O
running	O
Xfce	B-Language
via	O
XMir	B-Language
,	O
but	O
three	O
weeks	O
later	O
decided	O
to	O
refrain	O
from	O
adopting	O
it	O
.	O
</s>
<s>
In	O
June	O
2013	O
,	O
Canonical	O
's	O
publicly	O
announced	O
milestones	O
for	O
Mir	B-Language
development	O
were	O
to	O
ship	O
Unity	O
7	O
with	O
XMir	B-Language
by	O
default	O
and	O
a	O
pure	O
X11	B-Operating_System
fallback	O
mode	O
with	O
Ubuntu	B-Operating_System
13.10	O
,	O
remove	O
the	O
X11	B-Operating_System
fallback	O
with	O
Ubuntu	B-Operating_System
14.04	O
LTS	O
,	O
and	O
Unity	B-Device
8	I-Device
running	O
natively	O
on	O
Mir	B-Language
by	O
Ubuntu	B-Operating_System
14.10	O
.	O
</s>
<s>
Later	O
,	O
on	O
,	O
Canonical	O
announced	O
a	O
postponement	O
of	O
their	O
Mir	B-Language
plans	O
for	O
desktop	O
use	O
and	O
not	O
use	O
XMir	B-Language
as	O
default	O
in	O
Ubuntu	B-Operating_System
13.10	O
.	O
</s>
<s>
Ubuntu	B-Protocol
Touch	I-Protocol
,	O
however	O
is	O
targeted	O
to	O
ship	O
with	O
Mir	B-Language
and	O
a	O
smartphone	O
version	O
of	O
Unity	B-Device
8	I-Device
.	O
</s>
<s>
In	O
May	O
2016	O
,	O
during	O
his	O
traditional	O
video	O
interview	O
with	O
the	O
community	O
held	O
during	O
the	O
Ubuntu	B-Operating_System
Online	O
Summit	O
,	O
Mark	O
Shuttleworth	O
confirmed	O
that	O
"	O
You	O
will	O
be	O
able	O
to	O
get	O
16.10	O
with	O
Unity	B-Device
8	I-Device
,	O
just	O
like	O
you	O
can	O
get	O
16.04	O
with	O
MATE	O
,	O
or	O
KDE	O
,	O
or	O
GNOME	B-Application
.	O
</s>
<s>
On	O
5	O
April	O
2017	O
,	O
Canonical	O
announced	O
that	O
with	O
the	O
release	O
of	O
Ubuntu	B-Operating_System
18.04	O
LTS	O
,	O
the	O
Unity	B-Device
8	I-Device
interface	O
would	O
be	O
abandoned	O
in	O
favor	O
of	O
GNOME	B-Application
.	O
</s>
<s>
When	O
asked	O
if	O
the	O
decision	O
would	O
also	O
mean	O
the	O
end	O
of	O
Mir	B-Language
development	O
,	O
Canonical	O
's	O
Michael	O
Hall	O
said	O
that	O
given	O
the	O
divergent	O
development	O
paths	O
taken	O
by	O
Mir	B-Language
and	O
its	O
competitor	O
,	O
Wayland	B-Language
,	O
"	O
Using	O
Mir	B-Language
simply	O
is	O
n't	O
an	O
option	O
we	O
have.	O
"	O
</s>
<s>
However	O
,	O
Mark	O
Shuttleworth	O
clarified	O
on	O
8	O
April	O
2017	O
that	O
development	O
would	O
continue	O
for	O
Mir	B-Language
's	O
use	O
in	O
Internet	B-Operating_System
of	I-Operating_System
Things	I-Operating_System
(	O
IoT	B-Operating_System
)	O
applications	O
,	O
stating	O
:	O
"	O
we	O
have	O
lots	O
of	O
IoT	B-Operating_System
projects	O
using	O
Mir	B-Language
as	O
a	O
compositor	O
so	O
that	O
code	O
continues	O
to	O
receive	O
investment.	O
"	O
</s>
<s>
SDL	B-Operating_System
supported	O
both	O
Mir	B-Language
and	O
Wayland	B-Language
starting	O
with	O
SDL	B-Operating_System
2.0.2	O
but	O
it	O
was	O
disabled	O
by	O
default	O
.	O
</s>
<s>
Wayland	B-Language
and	O
Mir	B-Language
support	O
was	O
enabled	O
by	O
default	O
starting	O
with	O
SDL	B-Operating_System
2.0.4	O
.	O
</s>
<s>
With	O
the	O
release	O
of	O
2.0.10	O
,	O
Mir	B-Language
support	O
was	O
dropped	O
in	O
favor	O
of	O
Wayland	B-Language
.	O
</s>
<s>
GTK	B-Application
3.16	O
included	O
an	O
experimental	O
Mir	B-Language
backend	O
,	O
but	O
was	O
removed	O
in	O
GTK	B-Application
4	O
.	O
</s>
<s>
Qt5	B-Language
is	O
the	O
official	O
and	O
supported	O
toolkit	O
for	O
Unity8	O
and	O
Ubuntu	B-Protocol
Touch	I-Protocol
,	O
included	O
in	O
the	O
Ubuntu	B-Operating_System
SDK	B-Application
.	O
</s>
<s>
In	O
March	O
2013	O
,	O
Canonical	O
Ltd	O
.	O
announced	O
Mir	B-Language
as	O
the	O
replacement	O
display	O
server	O
for	O
the	O
X.Org	B-Operating_System
Server	I-Operating_System
in	O
Ubuntu	B-Operating_System
.	O
</s>
<s>
Previously	O
,	O
in	O
2010	O
,	O
it	O
had	O
announced	O
that	O
it	O
would	O
use	O
Wayland	B-Language
.	O
</s>
<s>
Canonical	O
stated	O
that	O
it	O
could	O
not	O
meet	O
Ubuntu	B-Operating_System
's	O
needs	O
with	O
Wayland	B-Language
.	O
</s>
<s>
When	O
originally	O
announcing	O
Mir	B-Language
,	O
Canonical	O
made	O
various	O
claims	O
about	O
Wayland	B-Language
's	O
input	O
system	O
,	O
which	O
the	O
Wayland	B-Language
developers	O
quickly	O
rebutted	O
.	O
</s>
<s>
Official	O
Canonical	O
documentation	O
in	O
2014	O
states	O
,	O
"	O
our	O
evaluation	O
of	O
the	O
protocol	O
definition	O
revealed	O
that	O
the	O
Wayland	B-Language
protocol	O
does	O
not	O
meet	O
our	O
requirements	O
.	O
</s>
<s>
Leap	B-General_Concept
Motion	I-General_Concept
)	O
into	O
account	O
...	O
With	O
respect	O
to	O
mobile	O
use-cases	O
,	O
we	O
think	O
that	O
the	O
handling	O
of	O
input	O
methods	O
should	O
be	O
reflected	O
in	O
the	O
display	O
server	O
protocol	O
,	O
too	O
.	O
</s>
<s>
In	O
late	O
2015	O
Mir	B-Language
switched	O
from	O
a	O
custom	O
Android-derived	O
input	O
stack	O
to	O
Wayland	B-Language
's	O
libinput	B-Language
.	O
</s>
<s>
Long-time	O
Linux	B-Operating_System
kernel	I-Operating_System
developer	O
Matthew	O
Garrett	O
criticized	O
the	O
choice	O
of	O
licensing	O
for	O
Canonical	O
's	O
software	O
projects	O
,	O
particularly	O
Mir	B-Language
.	O
</s>
<s>
Unlike	O
X.Org	B-Operating_System
Server	I-Operating_System
and	O
Wayland	B-Language
,	O
both	O
under	O
the	B-License
MIT	I-License
License	I-License
,	O
Mir	B-Language
is	O
licensed	O
under	O
GPLv3	O
–	O
"	O
an	O
odd	O
 [ choice ] 	O
 "	O
for	O
"	O
GPLv3-hostile	O
markets	O
"	O
–	O
but	O
contributors	O
are	O
required	O
to	O
sign	O
an	O
agreement	O
that	O
"	O
grants	O
Canonical	O
the	O
right	O
to	O
relicense	O
your	O
contribution	O
under	O
their	O
choice	O
of	O
license	O
.	O
</s>
<s>
Richard	O
Stallman	O
of	O
the	B-Operating_System
Free	I-Operating_System
Software	I-Operating_System
Foundation	I-Operating_System
has	O
stated	O
on	O
the	O
similar	O
case	O
of	O
MySQL	O
that	O
he	O
supports	O
dual-licensing	O
of	O
GPL	O
software	O
,	O
as	O
long	O
as	O
there	O
are	O
no	O
proprietary	O
extensions	O
or	O
proprietary	O
versions	O
of	O
the	O
free	O
program	O
,	O
which	O
was	O
not	O
the	O
case	O
for	O
MySQL	O
.	O
</s>
<s>
In	O
June	O
2013	O
,	O
Jonathan	O
Riddell	O
of	O
Kubuntu	B-Application
announced	O
that	O
Kubuntu	B-Application
did	O
not	O
plan	O
to	O
switch	O
to	O
Mir	B-Language
.	O
</s>
<s>
He	O
stated	O
"	O
A	O
few	O
months	O
ago	O
Canonical	O
announced	O
their	O
new	O
graphics	O
system	O
for	O
Ubuntu	B-Operating_System
,	O
Mir	B-Language
.	O
</s>
<s>
It	O
's	O
a	O
shame	O
the	O
Linux	B-Operating_System
desktop	O
market	O
has	O
n't	O
taken	O
off	O
as	O
we	O
all	O
hoped	O
at	O
the	O
turn	O
of	O
the	O
millennium	O
and	O
they	O
feel	O
the	O
need	O
to	O
follow	O
a	O
more	O
Apple	O
or	O
Android	B-Application
style	O
of	O
approach	O
making	O
an	O
OS	O
which	O
works	O
in	O
isolation	O
rather	O
than	O
as	O
part	O
of	O
a	O
community	O
development	O
method	O
.	O
</s>
<s>
Here	O
at	O
Kubuntu	B-Application
we	O
still	O
want	O
to	O
work	O
as	O
part	O
of	O
the	O
community	O
development	O
,	O
taking	O
the	O
fine	O
software	O
from	O
KDE	O
and	O
other	O
upstream	O
projects	O
and	O
putting	O
it	O
on	O
computers	O
worldwide	O
.	O
</s>
<s>
So	O
when	O
Ubuntu	B-Operating_System
desktop	O
gets	O
switched	O
to	O
Mir	B-Language
we	O
wo	O
n't	O
be	O
following	O
.	O
</s>
<s>
We	O
'll	O
be	O
staying	O
with	O
X	B-Operating_System
on	O
the	O
images	O
for	O
our	O
13.10	O
release	O
now	O
in	O
development	O
and	O
the	O
14.04	O
LTS	O
release	O
next	O
year	O
.	O
</s>
<s>
After	O
that	O
we	O
hope	O
to	O
switch	O
to	O
Wayland	B-Language
which	O
is	O
what	O
KDE	O
and	O
every	O
other	O
Linux	B-Application
distro	I-Application
hopes	O
to	O
do.	O
"	O
</s>
<s>
In	O
September	O
2013	O
,	O
an	O
Intel	O
developer	O
removed	O
XMir	B-Language
support	O
from	O
their	O
video	O
driver	O
and	O
wrote	O
"	O
We	O
do	O
not	O
condone	O
or	O
support	O
Canonical	O
in	O
the	O
course	O
of	O
action	O
they	O
have	O
chosen	O
,	O
and	O
will	O
not	O
carry	O
XMir	B-Language
patches	O
upstream.	O
"	O
</s>
