Meeting called to order by Ira McDonald at 12pm US Eastern. Minutes taken by Ira McDonald.
Recording of this conference call will be archived at:
http://www.openprinting.org/download/meetingnotes/op-telecons/
OP-Meeting-20170711.mp3
Attendees
Agenda
- No changes, waiting for Avahi changes (see Driverless Printing below).
- system-config-printer - Till's last changes got accepted upstream now. - See GSoC 2017 status for more driverless printing details. - Avahi - No signs of work on the localhost device support (for IPP-over-USB printers) from Trent Lloyd (Avahi maintainer) yet. - https://github.com/lathiat/avahi/issues/125
- CUPS source code and bug reports are handled on GitHub now
- https://github.com/apple/cups/
- CUPS summary (Till)
- CUPS 2.2.4 got released.
- This time we get mainly improvements and bug fixes on the new feature of
listing DNS-SD-discovered driverless-capable printers and auto-creating
temporary queues for them.
- Especially a client can now determine whether a queue is temporary and the
feature can also be used with CUPS command line tools.
- CUPS v2.2.4 release on 30 June 2017 (Mike)
- The scheduler did not remove old job files (Issue #4987)
- 'cupsEnumDests' did not return early when all printers had been
discovered (Issue #4989)
- The CUPS build system now supports cross-compilation (Issue #4897)
- Added a new CUPS Programming Manual to replace the aging API
documentation.
- Added the 'cupsAddIntegerOption' and 'cupsGetIntegerOption' functions
(Issue #4992)
- The 'cupsGetDests' and 'cupsCreateJob' functions now support Bonjour
printers (Issue #4993)
- Added a USB quirk rule for Lexmark E260dn printers (Issue #4994)
- Fixed a potential buffer overflow in the 'cupstestppd' utility (Issue
#4996)
- IPP Everywhere improvements (Issue #4998)
- Fixed the "cancel all jobs" function in the web interface for several
languages (Issue #4999)
- Fixed issues with local queues (Issue #5003, Issue #5008, Issue #5009)
- The 'lpstat' command now supports a '-e' option to enumerate local
printers (either previously added or on the network) that can be
accessed (Issue #5005)
- The 'lp' and 'lpr' commands now support printing to network printers
that haven't yet been added (Issue #5006)
- Fixed a typo in the mime.types file.
- Fixed a bug in the Spanish web interface template (Issue #5016)
- The 'cupsEnumDests*' and 'cupsGetDest*' functions now report the value
of the "printer-is-temporary" Printer Status attribute (Issue #5028)
- Added Chinese localization (Issue #5029)
- The 'cupsCheckDestSupported' function did not support 'NULL' values
(Issue #5031)
- Fixed some issues in the RPM spec file (Issue #5032)
- The 'cupsConnectDest' function now supports the 'CUPS_DEST_FLAGS_DEVICE'
flag for explicitly connecting to the device (printer) associated with the
destination.
- The 'SSLOptions' directive in "client.conf" and "cupsd.conf" now
supports 'DenyCBC' and 'DenyTLS1.0' options (Issue #5037)
- CUPS Filters v1.15.0 work-in-progress (Till)
- Currently Till is working on cups-browsed working well together with
CUPS new DNS-SD driverless printer discovery and temporary queue
creation feature: Using CUPS' queue naming scheme, distinguishing
between temporary and permanent CUPS queues, ...
- cups-browsed: Take care of CUPS' temporary queues. Do not
consider them when checking whether a queue with the same
name as the one we are creating already exists and make
temporary queues permanent (or remove them) before
overwriting them with our local queue.
- cups-browsed: Make the naming scheme for locally created
print queue configurable, especially allow for naming based
on the DNS-SD service name (now default) as this is the same
scheme as CUPS uses for its temporary queues. This way we
prevent CUPS creating temporary queues when cups-browsed is
already creating a queue.
- cups-browsed: Do not add "APRemoteQueueID" keyword to the
local queue's PPD file if the queue is for an IPP network
printer.
- cups-browsed: Skip multiple browse entries for the same
printer with interface alias addresses. Thanks to Edgar
Fuss (ef at math dot uni-bonn dot de, Bug #1399).
- cups-browsed: Improved support for Description (Info) and
Location fields of remote CUPS queues. Thanks to Edgar Fuss
(ef at math dot uni-bonn dot de, Bug #1398).
- cups-browsed: Renamed variable names for better code
readability. Thanks to Edgar Fuss (ef at math dot uni-bonn
dot de, Bug #1398).
- cups-browsed: Additional NULL checks in the
create_local_queue() function. Thanks to Edgar Fuss (ef at
math dot uni-bonn dot de, Bug #1398).
- CUPS Filters v1.14.1 release on 29 June 2017 (Till)
- Lots of debugging and crash preventing work: NULL checks, pre-filling
structures with zeros, extra logging, correct handling of duplicate
remote printer entries, ...
- cups-browsed: Do correct removal of printer entry handling
duplicates correctly also when a legacy CUPS-broadcasted
printer disappears or a printer remaining from the last
session does not appear again.
- cups-browsed: Use getline() instead of fgets() to read saved
option settings. This is less crash-prone (Ubuntu bug
#1658833).
- cups-browsed: Improved error logging when saving option
settings.
- cups-browsed: Added NULL checks for generate_local_queue()
and create_local_queue() functions.
- cups-browsed: When accessing local CUPS queues use always
the correct port of the CUPS daemon we are attached to.
- cups-browsed: Check whether a connection to the local CUPS
daemon actually happened before using it (Ubuntu bug
#1644049).
- cups-browsed: Set unused fields of printer record to NULL
when tranferring data from the record of a duplicate printer
to the record of a disappeared one.
- cups-browsed: Simplify removal of all queues on shutdown or
stop of Avahi.
- cups-browsed: When creating a record for a discovered
printer set it all zero before filling it in, to assure
that no field is in an undefined state.
- cups-browsed: All functions which are called via Glib
functions or otherwise event-triggered log now in which
thread they are running. This way one can see whether
problems can be caused by concurrent access to global
resources.
- cups-browsed: Do not check whether the DNS-SD event is from
the local machine in the browse_callback() function. We
cannot check the port here.
- cups-browsed: Added more NULL checks to Avahi callback
functions.
- cups-browsed: Added NULL check to avoid crashes in the Avahi
resolver callback (Ubuntu bug #1696967).
- libcupsfilters: Let PPD generator do case-insensitive
comparisons for PWG Raster color spaces, as some printers
(Epson) do not use the standard-conforming all-lowercase
form for them (CUPS Issue #4998).
- All is working well, no problems.
- All of our 7 OpenPrinting students (and also all the 11 Linux Foundation
students) passed the first of the three monthly evaluations end of June.
- All the OpenPrinting projects GSoC 2017 show very good progress:
- Sahil has done some infrastructure parts in cups-filters for the PCLm
support in the beginning (MIME conversion rules and PPD generation) and he
seems to understand the PCLm and PDF stuff well. He is currently working
on the PCLm extension in the rastertopdf filter and will perhaps be able
to try printing first jobs in a few days.
- Sahil also got his printer.
- Nilanjana is not only doing her CUPS backend but she works also on the
frontend/backend D-Bus interface and we will probably get some interface
library for the frontends (dialogs) from her, too.
- Nilanjana is also communicating with the other students for the integration
of her work.
- We unsuccessfully tried to get a second mentor for the two Qt students
Anshul and Rithvik. There were two persons coming up after our call who
promised to participate but they quickly gave up again. It seems that the
students do their work very well though, so that Dongxu is able to do
their mentoring alone. We must hope that the Qt upstream developers will
at least answer the students' questions when no one wants to take full
mentor responsibility.
- The students seem to do their work well and what they presented on a
general OpenPrinting GSoC meeting 2 weeks ago looks promising.
- GSoC 2017 Schedule
- 19 January to 9 February - DONE - Mentors submit organization applications
- 27 February - DONE - GSoC approves mentoring organizations
- 27 February to 20 March - DONE - Students discuss GSoC projects
- 20 March to 3 April - DONE - Students apply for GSoC projects
- 1 May - DONE - GSoC approves projects and Students
- 30 May - DONE - GSoC coding begins
- 26-30 June - DONE - GSoC Phase 1 evaluations
- 24-28 July - GSoC Phase 2 evaluations
- 21-29 August - GSoC "pencils down"
- Students fill out completion forms and evaluate Mentors
- 29 August to 5 September - Mentors submit Student evaluations
- 6 September - GSoC announces final results
- Late October - GSoC Mentor Summit at Google
- Till reported this already a month ago, but now we have one additional
project idea.
- We will use Aveek's very successful recruitment concept of starting with
finding students already in January again as we have been more effective
in finding good students.
- GSoC OP project ideas for 2018:
- SANE module for IPP driverless scanning (mainly for multi-function
printers).
- Support for IPP System Services (replacement of printer's admin web
interface by GUI in printer setup tool).
- Content-oriented printer auto-selection: Cluster arbitrary collection of
printers (all available printers) into one queue with merged PPD (all
options of all printers available, option conflicts if selection cannot be
obeyed on one single printer), user selects options (and document type,
like text, photo, ... is also submitted) and printer (or printers) to print
the job on get auto-selected by cups-browsed. User does not need to know
which printers are available and what they are capable of.
- PWG as Virtual F2F (PWG Host via WebEx) - 9-10 August 2017
- http://www.pwg.org/chair/meeting-info/meetings.html
- IPP Everywhere Self-Certification - PWG 5100.20-2016 - Active
- http://ftp.pwg.org/pub/pwg/candidates/
cs-ippeveselfcert10-20160219-5100.20.pdf
- REQUIRED for PWG IPP Everywhere Logo usage
- HP has certified 89 IPP Everywhere printers!
- https://www.pwg.org/ippeveselfcert
- IPP Everywhere Self-Certification website - opened 25 March 2016
- ONLY available to PWG members (but FREE to PWG members)
- JDFMAP (Ira/Rick Yardumian) - Stable draft
- http://ftp.pwg.org/pub/pwg/sm3/wd/wd-smjdfmap10-20170714.pdf
- PWG Formal Vote started 07/14/17 ends 08/28/17
- Schedule - PWG Best Practices in Q3 2017
- IPP 3D Print Job Ticket (Mike) - Stable draft
- http://ftp.pwg.org/pub/pwg/ipp/wd-20170627.pdf
- PWG Formal Vote started 07/06/17 ends 08/18/17
- Schedule - PWG Candidate Standard in Q3 2017
- IPP WG Charter (Ira) - PWG Approved
- http://ftp.pwg.org/pub/pwg/ipp/charter/ch-ipp-charter-20170615.pdf
- IPP WG and PWG SC approved in May 2017
- PWG Call for Objections started 05/25/17 ended 06/09/17
- Schedule - PWG Approved on 06/15/17
- IPP System Service (Mike/Ira) - Interim draft
- http://ftp.pwg.org/pub/pwg/ipp/wd/wd-ippsystem10-20170624-rev.pdf
- IPP WG review on 06/29/17
- Schedule - Prototype draft in Q3 2017 - prototype in "ippserver"
- IPP Get-User-Printer-Attributes (Smith) - whitepaper
- http://ftp.pwg.org/pub/pwg/ipp/whitepaper/tb-userop-20170524-rev.pdf
- PWG review at Virtual F2F on 05/04/17
- Schedule - TBD
- IPP Presets (Smith) - whitepaper
- http://ftp.pwg.org/pub/pwg/ipp/whitepaper/tb-ipp-preset-20170609.pdf
- IPP WG review on 05/11/17
- Schedule - TBD
- IPP Authentication (Smith) - whitepaper
- http://ftp.pwg.org/pub/pwg/ipp/whitepaper/ipp-authentication.pdf
- PWG review at Virtual F2F on 05/04/17
- Schedule - TBD
- PWG Virtual F2F (PWG Host via WebEx) - 9-10 August 2017 - http://www.pwg.org/chair/meeting-info/august-2017-virtual.html - Trusted Computing Group in Vancouver, BC, Canada - 23-26 October 2017 - http://www.trustedcomputinggroup.org/
Open Action Items
Next OP US/Europe/Brazil Conference Calls
- Note: PWG Virtual F2F (PWG Host via WebEx) - 9-10 August 2017
- Tuesday 1 August 2017, Daytime
- US
9am in San Francisco - US PDT (Pacific Daylight Time)
10am in Colorado - US MDT (Mountain Daylight Time)
11am in Chicago - US CDT (Central Daylight Time)
12pm in New York - US EDT (Eastern Daylight Time)
- Europe
6pm in Berlin - CEST (Central Europe Summer Time)
- Brazil
1pm in Belo Horizonte - BRT (Brasilia Time)
US: +1 641-715-3814
Germany: +49 (0) 221 98203421
Brazil: +55 61 4040-4460
Japan: +81 (0) 3-5050-5070
Participant Access Code: 622393#
(note that local numbers for many other countries are available,
also cellphone apps, VOIP support, etc. - please email Till for
details)
- Note - US Labor Day holiday is on 4 September 2017 - may delay OP call
- Tuesday 5 September 2017, Daytime
- US
9am in San Francisco - US PDT (Pacific Daylight Time)
10am in Colorado - US MDT (Mountain Daylight Time)
11am in Chicago - US CDT (Central Daylight Time)
12pm in New York - US EDT (Eastern Daylight Time)
- Europe
6pm in Berlin - CEST (Central Europe Summer Time)
- Brazil
1pm in Belo Horizonte - BRT (Brasilia Time)
US: +1 641-715-3814
Germany: +49 (0) 221 98203421
Brazil: +55 61 4040-4460
Japan: +81 (0) 3-5050-5070
Participant Access Code: 622393#
(note that local numbers for many other countries are available,
also cellphone apps, VOIP support, etc. - please email Till for
details)
- Note - TCG in Vancouver, BC, Canada on 23-26 October 2017
- Tuesday 3 October 2017, Daytime
- US
9am in San Francisco - US PDT (Pacific Daylight Time)
10am in Colorado - US MDT (Mountain Daylight Time)
11am in Chicago - US CDT (Central Daylight Time)
12pm in New York - US EDT (Eastern Daylight Time)
- Europe
6pm in Berlin - CEST (Central Europe Summer Time)
- Brazil
1pm in Belo Horizonte - BRT (Brasilia Time)
US: +1 641-715-3814
Germany: +49 (0) 221 98203421
Brazil: +55 61 4040-4460
Japan: +81 (0) 3-5050-5070
Participant Access Code: 622393#
(note that local numbers for many other countries are available,
also cellphone apps, VOIP support, etc. - please email Till for
details)