N.B. This is probably not a bug in Papers since it happens with Evince
as well, but I don't know how to identify the correct component to
file the bug against, but it manifests in Papers so I am hoping that
the Papers developers can either reassign as needed to solicit
whatever debugging info from me is needed to determine where the bug
needs to go.

Some time within the past few days, something I updated (I update
regularly from Testing) has broken printing from the GNOME system
dialog. Whenever I attempt to do so from any app -- I've tried Papers
Evince, and Firefox -- the app hangs and I get the '"<App>" is not
Responding' pop-up with "Force Quit" and "Wait" buttons.

As I said above, this is probably a bug in CUPS or a GNOME library or
something rather than a bug in Papers, but I don't know how to isolate
the root cause. I can, however, tell you this:

* I am able to print from the command line with `lp`.
* I am able to open the Printers page in the settings app and view
  printer details and options.

I am happy to fetch whatever logs or run whatever tests you need to
help isolate this.

Control: reassign -1 libcups2t64 2.4.15-1
Control: affects -1 + libgtk-3-0t64 papers evince atril
Control: tags -1 + moreinfo

GTK 3 and 4 in testing/unstable haven't changed recently, so I suspect
this is a libcups regression, probably the same one as
#1121751/#1121895/#1121660 (recently fixed in unstable by a new cups
upload). Please try with libcups2t64/2.4.16-1 when it becomes available
on your mirror.

The same is true for the bugs reported against papers and evince.

This is consistent with it being a libcups regression.

     smcv

Control: reassign -1 libcups2t64 2.4.15-1
Control: affects -1 + libgtk-3-0t64 papers evince atril
Control: tags -1 + moreinfo

GTK 3 and 4 in testing/unstable haven't changed recently, so I suspect
this is a libcups regression, probably the same one as
#1121751/#1121895/#1121660 (recently fixed in unstable by a new cups
upload). Please try with libcups2t64/2.4.16-1 when it becomes available
on your mirror.

The same is true for the bugs reported against papers and evince.

This is consistent with it being a libcups regression.

     smcv

I tried libcups2t64/2.4.16-1, restart the services and it works again

Thanks for that quick fix

Simon McVittie <smcv@debian.org> writes:

This fixes the issue with evince for me. I think it requires upgrading
several cups related packages [1] to 2.4.16-1, which I did.

d

[1]: cups cups-client cups-core-drivers cups-ipp-utils libcups2t64 cups-bsd cups-common cups-daemon cups-server-common

Simon McVittie <smcv@debian.org> writes:

This fixes the issue with evince for me. I think it requires upgrading
several cups related packages [1] to 2.4.16-1, which I did.

d

[1]: cups cups-client cups-core-drivers cups-ipp-utils libcups2t64 cups-bsd cups-common cups-daemon cups-server-common

It looks like this bug has been fixed meanwhile, so closing it now.

    Thorsten