bug#37911: closed ('ColorManager' D-Bus service (colord) fails to start)

[GNU bug Tracking System]

Your message dated Sat, 02 Nov 2019 14:11:46 +0000
with message-id <address@hidden>
and subject line Re: bug#37911: Cannot build a system with colord-service.
has caused the debbugs.gnu.org bug report #37911,
regarding 'ColorManager' D-Bus service (colord) fails to start
to be marked as done.

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-- 
37911: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=37911
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--- Begin Message --- Subject: Cannot build a system with colord-service. Date: Thu, 24 Oct 2019 21:45:23 +0100 User-agent: mu4e 1.2.0; emacs 26.3

Hello Guix!

I tried to add (service colord-service) to my config and I got a
error back :-(. I reduced my system to the minimum but the problem is
persist.

Here's the backtrace I get with the colord-system.scm config attached:

```
$ guix system build colord-system.scm
(snip)
27692 entries processed in 10.3 s
successfully built 
/gnu/store/76v9hszcal0llfs7q8yapp6v0rnjwmkr-manual-database.drv
building /gnu/store/xs3khl253kzrf14cn2jz5hpabd69j88v-dbus-system-services.drv...
find-files: 
/gnu/store/nqr4xi6yyxzlyxmpvq668ckiksf0k96a-wpa-supplicant-2.9/share/dbus-1/: 
No such file or directory
find-files: 
/gnu/store/hpgsfyn3qn0lxp1p9nwcg6fbvslwpf59-gdm-3.30.3/share/dbus-1/: No such 
file or directory
Backtrace:
           3 (primitive-load "/gnu/store/r5qblihnlj5ysy47k94a6s316mf?")
In ice-9/eval.scm:
    619:8  2 (_ #f)
In srfi/srfi-1.scm:
    640:9  1 (for-each #<procedure 7ffff3cb97e0 at ice-9/eval.scm:3?> ?)
In unknown file:
           0 (symlink "/gnu/store/9641z2pcm85gx0xqi51i78m6k229nryr-?" ?)

ERROR: In procedure symlink:
In procedure symlink: File exists
builder for 
`/gnu/store/xs3khl253kzrf14cn2jz5hpabd69j88v-dbus-system-services.drv' failed 
with exit code 1
build of /gnu/store/xs3khl253kzrf14cn2jz5hpabd69j88v-dbus-system-services.drv 
failed
View build log at 
'/var/log/guix/drvs/xs/3khl253kzrf14cn2jz5hpabd69j88v-dbus-system-services.drv.bz2'.
cannot build derivation 
`/gnu/store/sla70asv0sf2c7gn4a5v50qkmy019703-dbus-configuration.drv': 1 
dependencies couldn't be built
building /gnu/store/wq1naiygmpa01hn201l2i6ihd1bz44l1-etc-polkit-1.drv...
cannot build derivation `/gnu/store/vmnby0bcy575pylvbw5lva4k7zyrxrgd-etc.drv': 
1 dependencies couldn't be built
building /gnu/store/4zr21fl9wsyy591rglgw47yzw9nnia2g-gdm-custom.conf.drv...
cannot build derivation 
`/gnu/store/yc1mdlzqqwd24x7gkxa9n6qfmjzx83zg-system.drv': 1 dependencies 
couldn't be built
guix system: error: build of 
`/gnu/store/yc1mdlzqqwd24x7gkxa9n6qfmjzx83zg-system.drv' failed
```

Do you know what's going on?

Thanks!
Pierre

colord-system.scm
Description: Binary data

--- End Message ---

> --- Begin Message ---
>
>
>
> Subject: 
>
> Re: bug#37911: Cannot build a system with colord-service.
>
>
>
>
> Date: 
>
> Sat, 02 Nov 2019 14:11:46 +0000
>
>
>
>
> User-agent: 
>
> mu4e 1.2.0; emacs 26.3
>
>
>
>
> Hi Ludo,
>
> Ludovic Courtès writes:
>
> > Hi Jack and all,
> >
> > Ludovic Courtès <address@hidden> skribis:
> >
> >> Jack Hill <address@hidden> skribis:
> >
> > [...]
> >
> >>> I did spot another issue with colord since the recent core-updates
> >>> merge: https://issues.guix.gnu.org/issue/37843 It seems like it is no
> >>> longer being started automatically via dbus?
> >>
> >> Indeed, stracing dbus-daemon while going to the GNOME settings panel,
> >> “Color” tag, I see:
> >>
> >> 459   sendmsg(48, {msg_name=NULL, msg_namelen=0, 
> >> msg_iov=[{iov_base="l\3\1\1\213\0\0\0\3\0\0\0m\0\0\0\6\1s\0\5\0\0\0:1.95\0\0\0\4\1s\0'\0\0\0org.freedesktop.DBus.Error.AccessDenied\0\5\1u\0\2\0\0\0\10\1g\0\1s\0\0\7\1s\0\24\0\0\0org.freedesktop.DBus\0\0\0\0",
> >>  iov_len=128}, {iov_base="\206\0\0\0Connection \":1.95\" is not allowed to 
> >> own the service \"org.freedesktop.ColorManager\" due to security policies in 
> >> the configuration file\0", iov_len=139}], msg_iovlen=2, msg_controllen=0, 
> >> msg_flags=0}, MSG_NOSIGNAL <unfinished ...>
> >>
> >> So something somewhere is unhappy.
> >
> > Commit 33f9778bc83086837b99e5c5e99cd514cb0d154e fixes this and colord
> > now starts correctly again.
> >
> > I believe that should also fix the “night light” feature in GNOME.  I
> > tested it in a VM but it was hard to tell if it was working.
>
> I can confirm it's working for me on GNOME on my thinkpad! I can use the
> night light settings and the laptop screen was detected in the "Color"
> section of the settings. And I can see the colord daemon is running.
>
> This is awesome, thank you!
>
> Marking 37911 as done, I'll let Jack close 37843 if he's happy with it.
>
> Pierre
>
>
> --- End Message ---