Package: cups Version: 2.3.3op2-3 Severity: important Dear Maintainer,
Latest cups from unstable doesn't work with old USB printers anymore. At least Samsung ML-1640 just prints an error like "INTERNAL ERROR - Incomplete Session by time out". Root cause seems to be: https://bbs.archlinux.org/viewtopic.php?id=265299 https://github.com/OpenPrinting/cups/pull/160/commits/d2f41769f208729438414c76983385f0f13ef9b7 After applying this patch printing works again: src/cups-2.3.3op2# diff -up backend/usb-libusb.c_orig backend/usb-libusb.c --- backend/usb-libusb.c_orig 2021-05-25 11:41:02.981961321 +0300 +++ backend/usb-libusb.c 2021-05-25 11:42:39.990717869 +0300 @@ -1704,7 +1704,7 @@ static void *read_thread(void *reference readstatus = libusb_bulk_transfer(g.printer->handle, g.printer->read_endp, readbuffer, rbytes, - &rbytes, 250); + &rbytes, 60000); if (readstatus == LIBUSB_SUCCESS && rbytes > 0) { fprintf(stderr, "DEBUG: Read %d bytes of back-channel data...\n", (int)rbytes); Please consider applying this, thanks. Cheers, -Mikko -- System Information: Debian Release: bullseye/sid APT prefers unstable-debug APT policy: (500, 'unstable-debug'), (500, 'testing-debug'), (500, 'stable-debug'), (500, 'proposed-updates-debug'), (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1, 'experimental-debug') Architecture: amd64 (x86_64) Kernel: Linux 5.10.0-5-amd64 (SMP w/4 CPU threads) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages cups depends on: ii cups-client 2.3.3op2-3 ii cups-common 2.3.3op2-3 ii cups-core-drivers 2.3.3op2-3 ii cups-daemon 2.3.3op2-3 ii cups-filters 1.28.7-1 ii cups-ppdc 2.3.3op2-3 ii cups-server-common 2.3.3op2-3 ii debconf [debconf-2.0] 1.5.74 ii ghostscript 9.53.3~dfsg-7 ii libavahi-client3 0.8-5 ii libavahi-common3 0.8-5 ii libc6 2.31-9 ii libcups2 2.3.3op2-3 ii libgcc-s1 10.2.1-6 ii libstdc++6 10.2.1-6 ii libusb-1.0-0 2:1.0.24-3 ii poppler-utils 20.09.0-3.1 ii procps 2:3.3.17-3 Versions of packages cups recommends: ii avahi-daemon 0.8-5 ii colord 1.4.5-3 Versions of packages cups suggests: ii cups-bsd 2.3.3op2-3 pn cups-pdf <none> pn foomatic-db-compressed-ppds | foomatic-db <none> pn smbclient <none> ii udev 247.3-1 -- debconf information: cupsys/raw-print: true cupsys/backend: lpd, socket, usb, snmp, dnssd
