delay in raw print after upgrade 1.3.10 -> 1.4.6

[Helge Blischke]

Franta Hanzlik wrote:

> We have two serial-line cash text printers and one PCL USB printer, on
> which are printing from DOS application running on Linux under DOSEMU. All
> printers are in CUPS configured as "raw queue". When we run on old (Fedora
> 9/i386 w. cups-1.3.10) configuration, data to all printers was sent almost
> immediately (within cca 1 sec serial printers start print). Now after
> upgrade to newer distro (Fedora 14/i386 w. cups-1.4.6), we noticed
> significant (about further 5-6 second) delay until printing start. Please,
> is there any option which can solve this issue? Or, can someone recommend
> any method for debugging this problem?
> 
> I tried find some info, maybe http://www.cups.org/str.php?L3744 or
> http://www.cups.org/str.php?L3495 reports can relate with, but not sure.
> Any suggestion for this bug?

I'd suggest to adapt the patch by Mike from the 
http://www.cups.org/str.php?L3495
report to your cups-1.4.6. But note that doing so requires to rebuild 
cups-1.4.6 from the sources and replacing only the respective backends (not 
installing the complete rebuild system).

Helge