Still in problem even after installing most recent update (cups, 1.5.3-0ubuntu4). The symptom is also the same. * Printer is OK after several periods of powering on. * Then, printer suddenly hangs without warning. I only can know this by notifying printer spool does not proceed. * The only solution is to shut down the printer. My printer (Canon Pixma MP600) cannot shut down by "power" button after encoutering this trouble, only by plugging off the power code. * Everything seems to be normal after re-enterying power switch of the printer. Spooled printing is also OK. * This situation does not change even if I assign module "usblp" as a blacklisted one.
I cannot carve up the cause of this problem whether this is driver side and backend side. However, I suppose that the problem stems from backend, as same problem occurs after changing the driver. And it seems that some extra signal (possibly from cups?) makes the printer hangs up. However, it is also strange that the printer never time out after plugging off USB cable, or lettting it for several minutes. What is the best way to solve (or, at least collect related information) this problem ...? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/997040 Title: usb printer backend hangs when usblp kernel module is loaded To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cups/+bug/997040/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
