Lightroom Classic: Printing long/big jobs times out CUPS connection

  • 1
  • Problem
  • Updated 1 year ago
  • (Edited)
When making a print, Lr seems to open a connection to the queue (CUPS on Mac) when it starts producing the print job.  If this takes a while (MacBook Air, 25 3x2 prints on A3+ paper took > 5 minutes), CUPS with default settings times out and the job aborts with no indication of timeout (separate apple & CUPS bug reports filed).

Seems like there's no reason for Lightroom to hold the print queue connection while producing the print -- it can check what it needs, release, produce the print job, then open & spool.  This will avoid this issue.
Photo of fred carter

fred carter

  • 6 Posts
  • 0 Reply Likes
  • annoyed

Posted 1 year ago

  • 1
Photo of Bhargav

Bhargav, Official Rep

  • 84 Posts
  • 20 Reply Likes
Hi Fred,

Thanks for the feedback.
I've tried normal A4 prints and didn't face the issue.
What printer are you using?
Does this issue occur if you use any other Printer?


Photo of fred carter

fred carter

  • 6 Posts
  • 0 Reply Likes
In my case, the triggering issue is that I was making an A3+ "contact sheet" print.  So, I was making 25 3x2" little prints on the 1 A3+ page.  When doing this, Lr has to render 25 different images, and the changes I'd make pushed it over the 5 minute CUPS limit.

I don't think it's related to the printer (in general, it doesn't get far enough to talk directly to the printer).  Instead, it's related to how big the print job is.  A3+ (13x19 inches) with 25 3x2 images took it > 5 minutes on my MacBook Air.  Which triggered a timeout in CUPS, which dropped the print on the floor.

So the size of the paper is indirectly responsible, but the real contributor is the 25 images on that sheet of paper.

(For the record, printer is Epson SC P800.)