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Subject: bug#28088: "The name org.a11y.Bus was not provided by any .service files" with multiple applications
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Upon starting for example emacs in spectrwm I get this message:
[1]   Done                    emacs
user@abyayala ~$
** (emacs-25-2:19121): WARNING **: Error retrieving accessibility bus addre=
ss: org.freedesktop.DBus.Error.ServiceUnknown: The name org.a11y.Bus was no=
t provided by any .service files

It works alright, but I have seen the exact same message while
trying to figure out why mate-terminal does not start.
--=20
ng0
GnuPG: A88C8ADD129828D7EAC02E52E22F9BBFEE348588
GnuPG: https://n0is.noblogs.org/my-keys
https://www.infotropique.org https://krosos.org

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To: ng0 <ng0@HIDDEN>
Subject: bug#28088: Acknowledgement ("The name org.a11y.Bus was not
 provided by any .service files" with multiple applications)
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Subject: bug#28088: "The name org.a11y.Bus was not provided by any .service files" with multiple applications
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ng0 transcribed 1.6K bytes:
> Upon starting for example emacs in spectrwm I get this message:
> [1]   Done                    emacs
> user@abyayala ~$
> ** (emacs-25-2:19121): WARNING **: Error retrieving accessibility bus add=
ress: org.freedesktop.DBus.Error.ServiceUnknown: The name org.a11y.Bus was =
not provided by any .service files
>=20
> It works alright, but I have seen the exact same message while
> trying to figure out why mate-terminal does not start.
> --=20
> ng0
> GnuPG: A88C8ADD129828D7EAC02E52E22F9BBFEE348588
> GnuPG: https://n0is.noblogs.org/my-keys
> https://www.infotropique.org https://krosos.org

It is worth mentioning that this only happens with a
desktop-services ressembling services list + no xfce-service
or gnome-service in the system config.

Reconfiguring and adding GNOME, switching tp GNOME makes
this message not appear. We need to narrow down where
this error comes from.
--=20
ng0
GnuPG: A88C8ADD129828D7EAC02E52E22F9BBFEE348588
GnuPG: https://n0is.noblogs.org/my-keys
https://www.infotropique.org https://krosos.org

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Subject: bug#28088: "The name org.a11y.Bus was not provided by any .service files" with multiple applications
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References: <20170814192808.5ppgwpahwe4mre5h@abyayala>
 <20170814195645.ctqil2qdcusduvy5@abyayala>
Date: Wed, 23 Aug 2017 21:53:56 +0800
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 (ng0@HIDDEN's message of "Mon, 14 Aug 2017 19:56:45 +0000")
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ng0 <ng0@HIDDEN> writes:

> ng0 transcribed 1.6K bytes:
>> Upon starting for example emacs in spectrwm I get this message:
>> [1]   Done                    emacs
>> user@abyayala ~$
>> ** (emacs-25-2:19121): WARNING **: Error retrieving accessibility
>> bus address: org.freedesktop.DBus.Error.ServiceUnknown: The name
>> org.a11y.Bus was not provided by any .service files
>> 
>> It works alright, but I have seen the exact same message while
>> trying to figure out why mate-terminal does not start.
>> -- 
>> ng0
>> GnuPG: A88C8ADD129828D7EAC02E52E22F9BBFEE348588
>> GnuPG: https://n0is.noblogs.org/my-keys
>> https://www.infotropique.org https://krosos.org
>
> It is worth mentioning that this only happens with a
> desktop-services ressembling services list + no xfce-service
> or gnome-service in the system config.
>
> Reconfiguring and adding GNOME, switching tp GNOME makes
> this message not appear. We need to narrow down where
> this error comes from.

GTK+ applications will provide accessibility support over this dbus
service, so the AT-SPI clients (screen reader etc.) could use them.

And this 'org.a11y.Bus' service can be auto activated by the dbus
session daemon if the 'at-spi2-core' package is available.  If not,
we'll get thoese warnning from applications.

Usually they're harmless, and can be suppressed by set the environment
variable 'NO_AT_BRIGE=1'.

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Hi!

iyzsong@HIDDEN (=E5=AE=8B=E6=96=87=E6=AD=A6) skribis:

> GTK+ applications will provide accessibility support over this dbus
> service, so the AT-SPI clients (screen reader etc.) could use them.
>
> And this 'org.a11y.Bus' service can be auto activated by the dbus
> session daemon if the 'at-spi2-core' package is available.  If not,
> we'll get thoese warnning from applications.

It does sound like our GuixSD setup fails to activate org.a11y.Bus
though.  Should we add a service in %desktop-services that extends
=E2=80=98dbus-root-service-type=E2=80=99 with =E2=80=98at-spi2-core=E2=80=
=99 to ensure that
auto-activation works?

I think we should strive to provide accessible environments when
possible, as with GNOME.

Thanks,
Ludo=E2=80=99.

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ludo@HIDDEN (Ludovic Court=C3=A8s) writes:

> Hi!
>
> iyzsong@HIDDEN (=E5=AE=8B=E6=96=87=E6=AD=A6) skribis:
>
>> GTK+ applications will provide accessibility support over this dbus
>> service, so the AT-SPI clients (screen reader etc.) could use them.
>>
>> And this 'org.a11y.Bus' service can be auto activated by the dbus
>> session daemon if the 'at-spi2-core' package is available.  If not,
>> we'll get thoese warnning from applications.
>
> It does sound like our GuixSD setup fails to activate org.a11y.Bus
> though.  Should we add a service in %desktop-services that extends
> =E2=80=98dbus-root-service-type=E2=80=99 with =E2=80=98at-spi2-core=E2=80=
=99 to ensure that
> auto-activation works?

It's not a dbus system service, we can extend 'profile-service-package'
with 'at-spi2-core' to make it available for the user's dbus session
daemon.

>
> I think we should strive to provide accessible environments when
>possible, as with GNOME.

Yes, but without a client (we only have 'orca') the AT-SPI service alone
is not useful, maybe we should add Orca to both GNOME and Xfce? (I'm not
a user of any, so can't be sure.)

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--=-=-=
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable

Hello!

iyzsong@HIDDEN (=E5=AE=8B=E6=96=87=E6=AD=A6) skribis:

> ludo@HIDDEN (Ludovic Court=C3=A8s) writes:
>
>> Hi!
>>
>> iyzsong@HIDDEN (=E5=AE=8B=E6=96=87=E6=AD=A6) skribis:
>>
>>> GTK+ applications will provide accessibility support over this dbus
>>> service, so the AT-SPI clients (screen reader etc.) could use them.
>>>
>>> And this 'org.a11y.Bus' service can be auto activated by the dbus
>>> session daemon if the 'at-spi2-core' package is available.  If not,
>>> we'll get thoese warnning from applications.
>>
>> It does sound like our GuixSD setup fails to activate org.a11y.Bus
>> though.  Should we add a service in %desktop-services that extends
>> =E2=80=98dbus-root-service-type=E2=80=99 with =E2=80=98at-spi2-core=E2=
=80=99 to ensure that
>> auto-activation works?
>
> It's not a dbus system service, we can extend 'profile-service-package'
> with 'at-spi2-core' to make it available for the user's dbus session
> daemon.

Right.  In fact our =E2=80=98gnome=E2=80=99 package already propagates =E2=
=80=98at-spi2-core=E2=80=99
but not Orca.  Should we do this:


--=-=-=
Content-Type: text/x-patch
Content-Disposition: inline

diff --git a/gnu/packages/gnome.scm b/gnu/packages/gnome.scm
index 43547961b..a95214317 100644
--- a/gnu/packages/gnome.scm
+++ b/gnu/packages/gnome.scm
@@ -5827,6 +5827,7 @@ associations for GNOME.")
        ("font-cantarell"            ,font-cantarell)
        ("font-dejavu"               ,font-dejavu)
        ("at-spi2-core"              ,at-spi2-core)
+       ("orca"                      ,orca)
        ("dbus"                      ,dbus)
        ("dconf"                     ,dconf)
        ("desktop-file-utils"        ,desktop-file-utils)

--=-=-=
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable


?

What about Xfce?

There=E2=80=99s still a problem for people not using GNOME/Xfce, but maybe =
we
can=E2=80=99t address it in the same way (and maybe Orca is not the right t=
ool
either for those users; I see that we lack brltty for instance.)

Thanks,
Ludo=E2=80=99.

--=-=-=--

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