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After looking at cups (1.1.18) backend/usb.c and the kernel's (2.4.19-gentoo-r10) drivers/usb/printer.c I've found some different interpretations of the LP_* flags from linux/lp.h While the kernel seems to use the 8255 status port definitions, which use (amongst others) the flags, #define LP_PSELECD 0x10 /* unchanged input, active high */ #define LP_PERRORP 0x08 /* unchanged input, active low */ the same bits are defined by POSIX guidelines a few lines above in linux/lp.h: #define LP_OFFL 0x0008 #define LP_NOPA 0x0010 Obviously, this leads the cups usb-backend to incorrectly report an empty media tray when the printer is online, idle and has enough paper. This doesn't seem to be something serious, its just a wrong message in cups log-file. Greetings Alex PS: Since two different specifications are mixed up, this problem could also be a kernel problem. -- Alexander Puchmayr Systemadministrator for Theoretical Physics University Linz, Austria e-mail: alexander.puchmayr@jku.at Altenbergerstrasse 69 phone: +43/732/2468-8633 A-4040 Linz-Auhof FAX: +43/732/2468-8585 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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