Bug#874003: Also affected on uptodate sid

[Mikko Rapeli]

On Tue, Feb 27, 2018 at 12:49:41AM +0200, Mikko Rapeli wrote:
> Testing changes to desktop files shows that exo-file-manager.desktop
> is to blame for this behavior. It does correctly set OnlyShowIn=XFCE; so
> I don't get why it gets used in a Gnome session:
> 
> $ cat /usr/share/applications/exo-file-manager.desktop
> [Desktop Entry]
> Version=1.0
> Type=Application
> Exec=exo-open --launch FileManager %u
> Icon=system-file-manager
> StartupNotify=true
> Terminal=false
> Categories=Utility;X-XFCE;X-Xfce-Toplevel;
> OnlyShowIn=XFCE;
> X-XFCE-MimeType=inode/directory;x-scheme-handler/trash;
> Name=File Manager
> ...
> 
> But moving this file away from /usr/share/applications
> fixes external application starting from nautilus:
> 
> # mv /usr/share/applications/exo-file-manager.desktop /root/

This isn't needed after all. I traced the likely root cause on my
Debian sid installation to ~/.local/share/applications/mimeapps.list
entry:

[Added Associations]
...
x-scheme-handler/file=exo-file-manager.desktop

Commenting out this line fixes the issues for me. I was previously
using Xfce and switched to Gnome so these entries might be really
old. I still don't get what made this break few days ago though.

-Mikko

Bug#874003: Also affected on uptodate sid

[Mikko Rapeli]

On Sun, Feb 25, 2018 at 02:35:28PM -0500, Jeremy Bicha wrote:
> I suggest looking into what xdg-utils does.

Looks like xdg-utils, or at least xdg-open is not the one to blame since
it is calling gio open:

$ sh -x  $( which xdg-open) video.mp4
+ check_common_commands video.mp4
+ [ 1 -gt 0 ]
+ parm=video.mp4
+ shift
+ [ 0 -gt 0 ]
+ [ -z  ]
+ unset XDG_UTILS_DEBUG_LEVEL
+ [ 0 -lt 1 ]
+ xdg_redirect_output= > /dev/null 2> /dev/null
+ [ xvideo.mp4 != x ]
+ url=
+ [ 1 -gt 0 ]
+ parm=video.mp4
+ shift
+ [ -n  ]
+ url=video.mp4
+ [ 0 -gt 0 ]
+ [ -z video.mp4 ]
+ detectDE
+ unset GREP_OPTIONS
+ [ -n GNOME ]
+ DE=gnome
+ [ xgnome = x ]
+ [ xgnome = x ]
+ [ xgnome = x ]
+ [ xgnome = xgnome ]
+ which gnome-default-applications-properties
+ DE=gnome3
+ [ -f /run/user/1000/flatpak-info ]
+ [ xgnome3 = x ]
+ DEBUG 2 Selected DE gnome3
+ [ -z  ]
+ return 0
+ open_gnome3 video.mp4
+ gio help open
+ gio open video.mp4
+ [ 0 -eq 0 ]
+ exit_success
+ [ 0 -gt 0 ]
+ exit 0

** (exo-helper-1:20332): WARNING **: Could not open X display
Gtk-Message: GtkDialog mapped without a transient parent. This is discouraged.

My mime setup for video files is mplayer and that seems to correctly there:

$ xdg-mime query default video/mp4
userapp-mplayer-9GFM9U.desktop

Testing changes to desktop files shows that exo-file-manager.desktop
is to blame for this behavior. It does correctly set OnlyShowIn=XFCE; so
I don't get why it gets used in a Gnome session:

$ cat /usr/share/applications/exo-file-manager.desktop
[Desktop Entry]
Version=1.0
Type=Application
Exec=exo-open --launch FileManager %u
Icon=system-file-manager
StartupNotify=true
Terminal=false
Categories=Utility;X-XFCE;X-Xfce-Toplevel;
OnlyShowIn=XFCE;
X-XFCE-MimeType=inode/directory;x-scheme-handler/trash;
Name=File Manager
...

But moving this file away from /usr/share/applications
fixes external application starting from nautilus:

# mv /usr/share/applications/exo-file-manager.desktop /root/

-Mikko

Bug#874003: Also affected on uptodate sid

[Jeremy Bicha]

On Sun, Feb 25, 2018 at 2:25 PM, Mikko Rapeli  wrote:
> ** (exo-helper-1:4657): WARNING **: Could not open X display
> Gtk-Message: GtkDialog mapped without a transient parent. This is discouraged.
>
> After removing exo-utils package nautilus can open files again with external
> applications. So 'apt-get remove exo-utils' is the best workaround thus far.

I suggest looking into what xdg-utils does.

Thanks,
Jeremy Bicha

Bug#874003: Also affected on uptodate sid

[Mikko Rapeli]

On Sun, Feb 25, 2018 at 08:33:44PM +0200, Mikko Rapeli wrote:
> When opening files from nautilus it complains
> 
> "Failed to execute default File Manager.
> Input/Output error"

strace showed to me that nautilus calls gio which for some reason ends up
calling exo-open from Xfce desktop which fails. This has possibly something
to do with Gnome 3 running with wayland and Xfce runs under X11.

execve("/usr/bin/gio", ["gio", "open", "video.mp4"], 0x7ffd8d0aff40 /* 45 var
s */) = 0
...
openat(AT_FDCWD, "/usr/share/applications/exo-file-manager.desktop", O_RDONLY) 
= 8
...
** (exo-helper-1:4657): WARNING **: Could not open X display
Gtk-Message: GtkDialog mapped without a transient parent. This is discouraged.

After removing exo-utils package nautilus can open files again with external
applications. So 'apt-get remove exo-utils' is the best workaround thus far.

Maybe exo-utils from Xfce is hijacking something from Gnome desktop...

-Mikko

Bug#874003: Also affected on uptodate sid

[Mikko Rapeli]

When opening files from nautilus it complains

"Failed to execute default File Manager.
Input/Output error"

As mentioned here, opening files with "Open With Other Application" works.
This started in for me yesterday after applying updates. I did not change
anything in gnome configuration.

-- System Information:
Debian Release: buster/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 4.15.5+ (SMP w/4 CPU cores; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), 
LANGUAGE=en_US:en (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages nautilus depends on:
ii  desktop-file-utils 0.23-2
ii  gsettings-desktop-schemas  3.27.90-1
ii  gvfs   1.34.1-2
ii  libatk1.0-02.26.1-3
ii  libc6  2.26-6
ii  libcairo-gobject2  1.15.10-1
ii  libcairo2  1.15.10-1
ii  libexempi3 2.4.4-1
ii  libexif12  0.6.21-4
ii  libgail-3-03.22.28-1
ii  libgdk-pixbuf2.0-0 2.36.11-1
ii  libglib2.0-0   2.54.3-2
ii  libglib2.0-data2.54.3-2
ii  libgnome-autoar-0-00.2.2-3
ii  libgnome-desktop-3-12  3.26.2-6
ii  libgtk-3-0 3.22.28-1
ii  libnautilus-extension1a3.26.2-2
ii  libpango-1.0-0 1.40.14-1
ii  libpangocairo-1.0-01.40.14-1
ii  libselinux12.7-2+b1
ii  libtracker-sparql-2.0-02.0.3-1
ii  libx11-6   2:1.6.4-3
ii  nautilus-data  3.26.2-2
ii  shared-mime-info   1.9-2

Versions of packages nautilus recommends:
ii  gnome-sushi  3.24.0-3
ii  gvfs-backends1.34.1-2
ii  librsvg2-common  2.40.20-2

Versions of packages nautilus suggests:
ii  eog 3.26.2-3
ii  evince [pdf-viewer] 3.26.0-3
ii  nautilus-extension-brasero  3.12.2-4
ii  nautilus-sendto 3.8.6-2
ii  totem   3.26.0-3
ii  tracker 2.0.3-1
ii  vlc [mp3-decoder]   3.0.0-1
ii  xdg-user-dirs   0.16-1