Hi, I got a new HP 1022 USB printer and found it didn't work real well with Linux - Took forever (3min) to print a page, and sometimes gave up half way through. Google found suggestions that it works better with USB2 (my desktop only had USB1) and indeed it works fine on my notebook. So I got a USB2.0 card for the desk top, but that doesn't work any better (possibly worse). Ofcourse it works fine with the other operating system...
So I'm after some help. When I plug it into a USB 1.1 (Intel 82801BA/BAM USB) which is driven by uhci_hcd, I get lots of usblp0: off-line messages, every 10 seconds or so. The page sometimes prints successfully (After 3-4 minutes) or sometime the printer seems to give up and prints a partial page. When I plug into a USB2 port (ALi Corp USB 10b9:5239) driven by ehci_hcd, I get much worse. usblp0: error -71 reading printer status many times a second. (-71 is EPROTO). I recompiled with USB_DEBUG and now I also get echi_hcd 0000:02:09.3: devpath 3 ep0in 3strikes with each 'error -71 reading printer status' message. My notebook which works well and fast has USB Controller: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller What does this all mean? How can I fix? What more info can I extract? I just tried running on the ochi_hcd driver, by removing the ehci_hcd driver, and it is still a bit slow but seems to work reliably. Only tangentially related: When I plug two printers in (the HP and a canon i320) it reports Jul 29 14:26:34 elijah kernel: usb 4-1: new full speed USB device using ohci_hcd and address 10 Jul 29 14:26:35 elijah kernel: drivers/usb/class/usblp.c: usblp0: USB Bidirectional printer dev 10 if 0 alt 0 proto 2 vid 0x03F0 pid 0x2C17 Jul 29 14:28:52 elijah kernel: usb 1-2: new full speed USB device using uhci_hcd and address 7 Jul 29 14:28:53 elijah kernel: drivers/usb/class/usblp.c: usblp0: USB Bidirectional printer dev 7 if 0 alt 0 proto 2 vid 0x04A9 pid 0x107B note that BOTH are 'usblp0'. and only 'lp0' shows up in /sys/class/printer (udev manages to create both /dev/usb/lp[12]) When I unplug them, Jul 29 14:31:00 elijah kernel: usb 1-2: USB disconnect, address 7 Jul 29 14:31:00 elijah kernel: drivers/usb/class/usblp.c: usblp1: removed Jul 29 14:31:02 elijah kernel: usb 4-1: USB disconnect, address 10 Jul 29 14:31:03 elijah kernel: drivers/usb/class/usblp.c: usblp0: removed it reports usblp1 and usblp0 as you would expect, but lp0 remains in /sys/class/printer Any hints before I dive into the code and try to figure it out myself? Thanks, NeilBrown (not subscribed, so please include me in replies). ------------------------------------------------------- SF.Net email is Sponsored by the Better Software Conference & EXPO September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices Agile & Plan-Driven Development * Managing Projects & Teams * Testing & QA Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
