Till, The printer in question is was used completely *outside* CUPS - via the /dev/usb/lp* nodes only. Although there was also an attempt with using it with a raw queue - with the same result: whenever CUPS was enabled or the printer was not blacklisted the output from the printer was malformed.
My understanding is that something that CUPS libusb backend was doing in the 'probing' phase (backends/usb-libusb.c find_device()) is influencing the printer configuration and changing it's settings set by control characters. Attaching the lsusb portion related to the printer in question. ** Attachment added: "lsusb-out.txt" https://bugs.launchpad.net/ubuntu/+source/cups/+bug/1695884/+attachment/4889973/+files/lsusb-out.txt -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to cups in Ubuntu. https://bugs.launchpad.net/bugs/1695884 Title: usb probing malforms Epson TM-T70 label printer output Status in cups package in Ubuntu: Incomplete Bug description: CUPS USB probing malforms Epson TM-T70 (vendorid: 0x04b8 productid: 0x0202) which is used outside CUPS (via usblp driver). No matter whether the printer is set up as a CUPS raw printer or it's not used via CUPS (but rather via a device node under usblp control) the formatting is broken on the printed out labels: the orientation is different from what had been set, the fonts differ. After blacklisting the printer in the quirks file all the problems were gone. My assumption is that this printer should be blacklisted by default. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cups/+bug/1695884/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
