Frank, Can you run :
lsmod | grep ppdev ppdev needs to be loaded in the kernel for parallel support to function. If ppdev is not loaded run: modprobe ppdev Thanks! Aaron Frank Cox wrote:
I just purchased a new computer to replace my main desktop machine. I have a HP Laserjet 2550L printer on this machine. I had this printer hooked to my old machine with a parallel cable and set it up using the CUPS web interface and it worked fine. However, as it is my understanding that the hplip driver is better (because it can report toner levels and do the cleaning routine and so on) and because hplip apparently works only through USB on this printer, I hooked it up with a USB cable this time instead of a parallel cable. My problem is that while this computer can apparently find the printer, itdoesn't actually print.This is what I get in /var/log/messages: Aug 5 09:55:29 jeff hpiod: 1.6.6a accepting connections at 50000... Aug 5 09:56:01 jeff hpiod: unable to read Dot4ReverseReply header: Resource temporarily unavailable bytesRead=0 io/hpiod/dot4.cpp 245 Aug 5 09:56:01 jeff hpiod: invalid DOT4InitReply retrying command... io/hpiod/dot4.cpp 332 Aug 5 09:56:05 jeff hpiod: unable to read Dot4ReverseReply header: Resource temporarily unavailable bytesRead=0 io/hpiod/dot4.cpp 245 Aug 5 09:56:05 jeff hpiod: invalid DOT4InitReply: cmd=0, result=20 , revision=20 io/hpiod/dot4.cpp 343 Aug 5 09:56:06 jeff hp_color_LaserJet_2550_series?serial=00CNGKG37479: INFO: open print channel failed; will retry in 30 seconds... Running hp-check, I get this: Checking for library dependencies... Checking for libnetsnmp... error: Not found. Checking for libjpeg... error: Not found. Checking for libusb... error: Not found. Checking for libcrypto... error: Not found. Checking for libpthread... error: Not found. All of the files listed are present in /usr/lib. Following instructions I found here: http://www.mail-archive.com/[email protected]/msg00881.html I power-cycled the printer, unplugged the USB cable, restarted hplip and cups, and plugged the cable back in. When I went back into the CUPS web interface, I saw that the printer was listed about four times in different ways on the initial page under "new printers found". I installed it as Device URI: usb://HP/color%20LaserJet%202550%20series This prints just fine but the hp-* tools don't recognize it, of course. The other entries that specify the hp: CUPS backend (those that actually use hplip) still won't print. I can, however, run hp-toolbox and view all of the statistics and whatnot for the printer if this printer-that-won't-print is set up under CUPS as well. So it appears that I can access all of the functions of this printer by having it listed twice. Once as a usb: device to actually print with, and once as ahp: device to view status and clean it and so on.I welcome any suggestions or ideas. Is there something that I am missing or doing wrong?
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