Arch Linux User Repository

@hades How can we determine which mime types are invalid?

Mine seemingly stops when trying to parse mpv.desktop from the mpv package in extra. The MimeType line seems fine to me, no obviously incorrect mime types listed, but I'm also not entirely sure what I'm actually looking for.

As far as I could tell, it's only there to show icons in the file browser (I didn't decompile the entire binary though, so it might just as well send it along with the rest of the telemetry).

@hades you're a life saver! Thanks big time for yor hint to use strace to find the .desktop file that caused an exception. After fixing it, Insync's GUI loads up just fine.

Although I'm not quite sure why are all my .desktop files scanned during Insync's start up routine...

I've also opened an issue in pyxdg: https://gitlab.freedesktop.org/xdg/pyxdg/-/issues/36

@hades - Thankyou! 3.9.0.60000 is now working for me. In my case the offending file was leftover from a fixefox install back in 2013.

I was able to find the root cause and reproduce this problem. This happens when you have a .desktop file with an invalid MIME type.

To solve this, you can find which .desktop file is broken on your system, e.g. by using strace:

strace -f --trace=file --status=successful /usr/bin/insync start --no-daemon

(look for the last opened .desktop file before the exception).

@hades: I just tried running it using the command that you shared - didn't cut it for me - I see the same errors as withoud xcb mode

Edit:

I didn't pay enough attention - the EGL error is missing, but the other stuff is there and still no GUI:

QT_QPA_PLATFORM=xcb /usr/bin/insync start --no-daemon
QFont::fromString: Invalid description 'Noto Sans,9,-1,5,400,0,0,0,0,0,0,0,0,0,0,1'
QFont::fromString: Invalid description 'Hack,10,-1,5,400,0,0,0,0,0,0,0,0,0,0,1'
QFont::fromString: Invalid description 'Noto Sans,9,-1,5,400,0,0,0,0,0,0,0,0,0,0,1'
QFont::fromString: Invalid description 'Noto Sans,9,-1,5,400,0,0,0,0,0,0,0,0,0,0,1'
Exception in thread Thread-1:
Traceback (most recent call last):
  File "threading.py", line 980, in _bootstrap_inner
  File "threading.py", line 917, in run
  File "idesklinux/app.py", line 58, in start_core
  File "idesklinux/platapp_impl.py", line 28, in __init__
  File "idesklinux/application_manager.py", line 26, in __init__
  File "idesklinux/application_manager.py", line 82, in __index_apps_for_mimetypes
  File "idesklinux/application_manager.py", line 179, in __record_desktop_files
  File "idesklinux/application_manager.py", line 134, in __canonicalize_mimetype
  File "xdg/Mime.py", line 58, in lookup
  File "xdg/Mime.py", line 72, in __new__
AttributeError: 'NoneType' object has no attribute 'lower'

FWIW, on my box insync shows a blank window when run with Qt in Wayland mode. I don't get the EGL error, but I get the following messages:

qt.qpa.wayland: Wayland does not support QWindow::requestActivate()
qt.qpa.wayland: Wayland does not support QWindow::requestActivate()

Either way, I couldn't be bothered debugging this, so I just run insync in X11 mode:

$ QT_QPA_PLATFORM=xcb /usr/bin/insync start --no-daemon

Yeah, but it's still weird that on one laptop the GUI is working properly, while on the other - not. Looks like a dependency that is not satisfied on one of the computers. I tried googling for this error, but didn't accomplish much: qt.qpa.wayland: EGL not available

I don't think the issues has anything to do with Windowing systems. The error is clearly in the way insync accesses mime types on the system, which is broken. I'm on X11 if that helps anything