Comment 34 for bug 997040

With usblp blacklisted - everything works (did not test usb-unidir-default=true in this case).

When usblp is not blacklisted:
Jun 15 10:42:37 mcprek4 kernel: [ 65.370530] audit_printk_skb: 3 callbacks suppressed
Jun 15 10:42:37 mcprek4 kernel: [ 65.370550] type=1400 audit(1339746157.300:13): apparmor="STATUS" operation="profile_replace" name="/usr/lib/cups/backend/cups-pdf" pid=1172 comm="apparmor_parser"
Jun 15 10:42:37 mcprek4 kernel: [ 65.378893] type=1400 audit(1339746157.308:14): apparmor="STATUS" operation="profile_replace" name="/usr/sbin/cupsd" pid=1172 comm="apparmor_parser"
Jun 15 10:42:42 mcprek4 kernel: [ 70.584173] usb 1-1: USB disconnect, device number 2
Jun 15 10:42:42 mcprek4 kernel: [ 70.590193] usblp0: removed
Jun 15 10:42:46 mcprek4 kernel: [ 74.792106] usb 1-1: new full-speed USB device number 3 using uhci_hcd
Jun 15 10:42:46 mcprek4 kernel: [ 74.971457] usblp0: USB Bidirectional printer dev 3 if 1 alt 0 proto 2 vid 0x04E8 pid 0x341B
Jun 15 10:42:56 mcprek4 kernel: [ 84.342362] usblp0: removed
Jun 15 10:43:19 mcprek4 kernel: [ 107.611910] usblp0: USB Bidirectional printer dev 3 if 1 alt 0 proto 2 vid 0x04E8 pid 0x341B
Jun 15 10:44:36 mcprek4 kernel: [ 184.270747] usblp0: removed
Jun 15 10:44:56 mcprek4 kernel: [ 204.648783] usblp0: USB Bidirectional printer dev 3 if 1 alt 0 proto 2 vid 0x04E8 pid 0x341B
Jun 15 10:45:10 mcprek4 kernel: [ 218.640172] usb 1-1: USB disconnect, device number 3
Jun 15 10:45:10 mcprek4 kernel: [ 218.648305] usblp0: removed
Jun 15 10:45:16 mcprek4 kernel: [ 224.408175] usb 1-1: new full-speed USB device number 4 using uhci_hcd
Jun 15 10:45:16 mcprek4 kernel: [ 224.584529] usblp0: USB Bidirectional printer dev 4 if 1 alt 0 proto 2 vid 0x04E8 pid 0x341B
Jun 15 10:45:21 mcprek4 kernel: [ 229.610385] usblp0: removed
Jun 15 10:45:40 mcprek4 kernel: [ 248.777551] usblp0: USB Bidirectional printer dev 4 if 1 alt 0 proto 2 vid 0x04E8 pid 0x341B
Jun 15 10:49:58 mcprek4 kernel: [ 506.469079] usblp0: removed
Jun 15 10:50:18 mcprek4 kernel: [ 526.876918] usblp0: USB Bidirectional printer dev 4 if 1 alt 0 proto 2 vid 0x04E8 pid 0x341B
Jun 15 10:50:42 mcprek4 kernel: [ 550.728172] usb 1-1: USB disconnect, device number 4
Jun 15 10:50:42 mcprek4 kernel: [ 550.736298] usblp0: removed
Jun 15 10:50:47 mcprek4 kernel: [ 555.184117] usb 1-1: new full-speed USB device number 5 using uhci_hcd
Jun 15 10:50:47 mcprek4 kernel: [ 555.363460] usblp0: USB Bidirectional printer dev 5 if 1 alt 0 proto 2 vid 0x04E8 pid 0x341B
Jun 15 10:51:19 mcprek4 kernel: [ 587.104133] usblp0: removed
Jun 15 10:51:39 mcprek4 kernel: [ 607.552854] usblp0: USB Bidirectional printer dev 5 if 1 alt 0 proto 2 vid 0x04E8 pid 0x341B
Jun 15 10:51:43 mcprek4 kernel: [ 611.825536] usblp0: removed