On Friday, 30 October 2020 16:49:31 GMT Peter Humphrey wrote: > On Friday, 30 October 2020 11:51:32 GMT Michael wrote: > > You need to add your user to the lpadmin group. > > All right. I've never had to do so before, but I have now. I've also set > USE=zeroconf on /net-print/cups and remerged it. Both cupsd and cups-browsed > are in the default run level. I've even tried connecting via USB-2; when I > plug it in I get this in syslog: > > Oct 30 15:51:37 peak kernel: usb 3-7: new high-speed USB device number 9 > using xhci_hcd > Oct 30 15:51:37 peak kernel: usblp 3-7:1.1: usblp0: USB Bidirectional > printer dev 9 if 1 alt 0 proto 2 vid 0x043D pid 0x0300 > Oct 30 15:51:37 peak kernel: usbcore: registered new interface driver usblp > > That all looks okay to me, no? But still cups can't see the printer.
We're confusing means of communication with the printer, or I am. The in- kernel USB Printer support is deprecated and most printer software no longer support it. Instead just the USE="usb" flag when compiling cups should allow you to communicate with USB ports on printers and the cupsd GUI should show the printer when plugged in to a USB port on the PC. If you have compiled the USB Printer support as a module you'll need to blacklist it so it doesn't load. > I found a way, eventually. I had to declare the printer manually, under Add > Printer. I chose ipp and gave it the URL ipp://<ip-addr>/ipp/print. URLs imply a network connection using an ethernet cable, which is what I assume you were trying to set up in the first instance. Avahi/zeroconf/upnp will announce the printer on the network and as long as cups is compiled with USE="zeroconf" it should show up when you go to Administration > Add Printer. > It was > found instantly and I could set the paper size. But when I print an Amazon > return label with Firefox, I get just the text with a blank, framed box > where the QR and bar codes should be. > > Google-chrome printed it though. This is a browser + printing CSS if one is made available by the website. Browsers have different default printing settings, including or excluding background images, background colours, etc. Google-chrome happens to work on this occasion, but the web developer ought to have done a better job by also providing their preferred CSS for print jobs. > Emerge -pv firefox returned this: > www-client/firefox-82.0.2:0/82::gentoo USE="clang dbus gmp-autoupdate > hwaccel openh264 pulseaudio system-av1 system-harfbuzz system-icu > system-jpeg system- libevent system-libvpx system-webp -debug -eme-free > -geckodriver -hardened - jack -lto -pgo -screencast (-selinux) -wayland > -wifi" L10N="en-GB ..." > > Am I missing something important from that? Nothing obvious jumps out, but half of these USE flags do not mean much to me. :-/ More knowledgeable contributors on FF compile options should be able to chime in.
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