okular printer list

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okular printer list

Peter Suetterlin-2

  Hi,

does someone know where okular is getting the printer list from?
When I try to print something okular hangs for the next few minutes, obviously
trying to contact some printers it found/knows.

Starting from command line I can see

begin enumerating printers
printomat _  _ 1
HP_Color_LaserJet_MFP_M277dw_Peter_s_MacBook_Pro _  _ 2
HP_Color_LaserJet_4700_tine_thinkpad _  _ 3
HP_DeskJet_5820_series_Poonam_s_MacBook_Pro _  _ 4
end enumerating printers

1 (printomat) is the only one defined in cups (as local queue, smb printer)
I disabled cups-browsed, Browsing in cupsd.conf is 'No', too

An 'lpstat -a' only lists the printomat printer.

Is okular/kde browsing by itself?  Or is this some cache corpse from earlier?

It's really annoying having to wait that long for printing something :((

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Re: okular printer list

Peter Suetterlin-2
Peter Suetterlin wrote:
>
>   Hi,
>
> does someone know where okular is getting the printer list from?
> When I try to print something okular hangs for the next few minutes, obviously
> trying to contact some printers it found/knows.

.....

> Is okular/kde browsing by itself?  Or is this some cache corpse from earlier?


Yuck, found it:  avahi-daemon, activated via dbus :o

So after a
woodstock:~ # systemctl disable avahi-daemon.service
Removed /etc/systemd/system/multi-user.target.wants/avahi-daemon.service.
Removed /etc/systemd/system/dbus-org.freedesktop.Avahi.service.
woodstock:~ # systemctl disable avahi-daemon.socket
Removed /etc/systemd/system/sockets.target.wants/avahi-daemon.socket.

I'm no longer blocked by those users that export their configured remote
printers

Is that avahi thing neccessary/useful for other stuff, or can it stay disabled?

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Re: okular printer list

Carlos E. R.-2
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On Thursday, 2018-01-25 at 13:43 -0000, Peter Suetterlin wrote:

> Yuck, found it:  avahi-daemon, activated via dbus :o
>
> So after a
> woodstock:~ # systemctl disable avahi-daemon.service
> Removed /etc/systemd/system/multi-user.target.wants/avahi-daemon.service.
> Removed /etc/systemd/system/dbus-org.freedesktop.Avahi.service.
> woodstock:~ # systemctl disable avahi-daemon.socket
> Removed /etc/systemd/system/sockets.target.wants/avahi-daemon.socket.
>
> I'm no longer blocked by those users that export their configured remote
> printers
>
> Is that avahi thing neccessary/useful for other stuff, or can it stay disabled?

Well, it is supposed to find other machines and what they export, where
they are, etc.

But I thought that it did the searching in background and gave the info
when requested, no need to wait.

- --
Cheers,
        Carlos E. R.
        (from openSUSE 42.2 x86_64 "Malachite" at Telcontar)

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Re: okular printer list

Peter Suetterlin-2
Carlos E. R. wrote:
> -----BEGIN PGP SIGNED MESSAGE-----

> >Is that avahi thing neccessary/useful for other stuff, or can it stay disabled?
>
> Well, it is supposed to find other machines and what they export, where they
> are, etc.

So I'd probably know if I needed it - which means I don't :D

> But I thought that it did the searching in background and gave the info when
> requested, no need to wait.

This probably is okular itself.  I can see (on command line) that the printer
list is indeed there immediately, the hang comes after building the printer
list.  Likely okular tries to get the settings for all those printers before
continuing, and as those laptops do only advertize their printers but don't
react on connects it runs into timeouts....

Not sure if that could be called a bug (rather not), but maybe a better solution
would be to only request more info if one of those is actually selected...

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Re: okular printer list

Carlos E. R.-2
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On Friday, 2018-01-26 at 12:44 -0000, Peter Suetterlin wrote:
> Carlos E. R. wrote:
>
>>> Is that avahi thing neccessary/useful for other stuff, or can it stay disabled?
>>
>> Well, it is supposed to find other machines and what they export, where they
>> are, etc.
>
> So I'd probably know if I needed it - which means I don't :D

Maybe connect to a Windows folder in the office?

But if you don't miss anything, it is fine to stop the service. I did some
years ago, but now it is running.

>> But I thought that it did the searching in background and gave the info when
>> requested, no need to wait.
>
> This probably is okular itself.  I can see (on command line) that the printer
> list is indeed there immediately, the hang comes after building the printer
> list.  Likely okular tries to get the settings for all those printers before
> continuing, and as those laptops do only advertize their printers but don't
> react on connects it runs into timeouts....
>
> Not sure if that could be called a bug (rather not), but maybe a better solution
> would be to only request more info if one of those is actually selected...

Certainly.

- --
Cheers,
        Carlos E. R.
        (from openSUSE 42.2 x86_64 "Malachite" at Telcontar)

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Re: okular printer list

Peter Suetterlin-2
Carlos E. R. wrote:

 [avahi]
 
> >So I'd probably know if I needed it - which means I don't :D
>
> Maybe connect to a Windows folder in the office?

Hehe, I'm one of those happy Zion people that live without the connectors.

I'm Windows-free even at the office, since more than 20 Years :D

> >Not sure if that could be called a bug (rather not), but maybe a better solution
> >would be to only request more info if one of those is actually selected...
>
> Certainly.

I've mentioned it in a related (I think) issue,
https://bugzilla.opensuse.org/show_bug.cgi?id=1064872

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Re: okular printer list

Carlos E. R.-2
On 2018-01-26 16:22, Peter Suetterlin wrote:

> Carlos E. R. wrote:
>
>  [avahi]
>  
>>> So I'd probably know if I needed it - which means I don't :D
>>
>> Maybe connect to a Windows folder in the office?
>
> Hehe, I'm one of those happy Zion people that live without the connectors.
>
> I'm Windows-free even at the office, since more than 20 Years :D
Good :-)

Maybe iphone or Android tablets?
[...]
Ah, yes, I forgot Macs.

>
>>> Not sure if that could be called a bug (rather not), but maybe a better solution
>>> would be to only request more info if one of those is actually selected...
>>
>> Certainly.
>
> I've mentioned it in a related (I think) issue,
> https://bugzilla.opensuse.org/show_bug.cgi?id=1064872

I just read it.

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Cheers / Saludos,

                Carlos E. R.
                (from 42.2 x86_64 "Malachite" at Telcontar)


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