I am seeing a problem similar to the one described in bug #424661, my USB printer (Samsung ML-2010) is constantly connecting / disconnecting when running kernels 2.6.21 or 2.6.22. It works absolutely fine with 2.6.18.
The logs show a strange pattern of disconnect/reconnect exactly every 30s, I am not sure whether this is actually linked to the problem or whether this is CUPS retrying to print: Jul 27 20:15:56 sharky kernel: usb 2-1: USB disconnect, address 5 Jul 27 20:15:56 sharky kernel: drivers/usb/class/usblp.c: usblp0: removed Jul 27 20:15:56 sharky kernel: usb 2-1: new full speed USB device using uhci_hcd and address 6 Jul 27 20:15:57 sharky kernel: usb 2-1: configuration #1 chosen from 1 choice Jul 27 20:15:57 sharky kernel: drivers/usb/class/usblp.c: usblp0: USB Bidirectional printer dev 6 if 0 alt 0 proto 2 vid 0x04E8 pid 0x326C Jul 27 20:16:26 sharky kernel: usb 2-1: USB disconnect, address 6 Jul 27 20:16:26 sharky kernel: drivers/usb/class/usblp.c: usblp0: removed Jul 27 20:16:26 sharky kernel: usb 2-1: new full speed USB device using uhci_hcd and address 7 Jul 27 20:16:27 sharky kernel: usb 2-1: configuration #1 chosen from 1 choice Jul 27 20:16:27 sharky kernel: drivers/usb/class/usblp.c: usblp0: USB Bidirectional printer dev 7 if 0 alt 0 proto 2 vid 0x04E8 pid 0x326C Jul 27 20:16:56 sharky kernel: usb 2-1: USB disconnect, address 7 Jul 27 20:16:56 sharky kernel: drivers/usb/class/usblp.c: usblp0: removed Jul 27 20:16:57 sharky kernel: usb 2-1: new full speed USB device using uhci_hcd and address 8 Jul 27 20:16:57 sharky kernel: usb 2-1: configuration #1 chosen from 1 choice Jul 27 20:16:57 sharky kernel: drivers/usb/class/usblp.c: usblp0: USB Bidirectional printer dev 8 if 0 alt 0 proto 2 vid 0x04E8 pid 0x326C Jul 27 20:17:27 sharky kernel: usb 2-1: USB disconnect, address 8 Jul 27 20:17:27 sharky kernel: drivers/usb/class/usblp.c: usblp0: removed Jul 27 20:17:27 sharky kernel: usb 2-1: new full speed USB device using uhci_hcd and address 9 Jul 27 20:17:27 sharky kernel: usb 2-1: configuration #1 chosen from 1 choice Jul 27 20:17:27 sharky kernel: drivers/usb/class/usblp.c: usblp0: USB Bidirectional printer dev 9 if 0 alt 0 proto 2 vid 0x04E8 pid 0x326C Cheers, Jeremy -- http://www.jerryweb.org/ : JerryWeb.org http://sailcut.sourceforge.net/ : Sailcut CAD
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