On Wed, Dec 02, 2009, Will Marler wrote: > This bug is not a duplicate of #54273.
I have unmarked the duplicate and changed the title of this bug slightly. > This is not a trivial bug, because, as has been previously mentioned, it makes the syslog useless for all reasonable purposes. You cannot "tail -f" watch it for output when troubleshooting other issues For reference, you can still do: # tail -f /var/log/syslog | grep -v "unable to enumerate" That certainly doesn't mean it's not very annoying though: that trick does not apply to consoles, so consoles are essentially impossible to use as anything interesting gets overwritten by once a second USB errors. > Isn't there even a workaround available? I have not found one other than unloading the module (prior to Ubuntu Karmic) or disabling the device through /proc (since the support seems to be built in in Karmic). This is not satisfactory, since the side- effect is disabling the device itself. There's some discussion on the linux kernel mailing list, see for example: Patch originally adding error message: http://lkml.org/lkml/2008/4/29/401 Linus Torvalds reports seeing this message frequently logged: http://lkml.org/lkml/2008/4/25/485 Alan Stern acknowledged that the message may appear "frequently" but is "harmless": http://lkml.org/lkml/2008/4/26/217 Patch submitted to limit the appearance of the message: http://lkml.org/lkml/2008/10/23/449 and following Alan Stern replies that he'd rather not "paper over" the message and that it is due to userspace loading the drivers in the wrong order: http://lkml.org/lkml/2008/10/24/209 ** Description changed: 1) lsb_release -rd Description: Ubuntu intrepid (development branch) Release: 8.10 2) apt-cache policy linux linux: - Installed: (none) - Candidate: 2.6.26.5.7 - Version table: - 2.6.26.5.7 0 - 500 http://us.archive.ubuntu.com intrepid/restricted Packages + Installed: (none) + Candidate: 2.6.26.5.7 + Version table: + 2.6.26.5.7 0 + 500 http://us.archive.ubuntu.com intrepid/restricted Packages 3) I expect for the system to boot up without errors. 4) The system boots up and endlessly repeats: [...] [ 595.878673] hub 4-0:1.0: unable to enumerate USB device on port 5 [ 596.410662] hub 4-0:1.0: unable to enumerate USB device on port 5 [ 596.930656] hub 4-0:1.0: unable to enumerate USB device on port 5 [ 597.442648] hub 4-0:1.0: unable to enumerate USB device on port 5 [ 597.966870] hub 4-0:1.0: unable to enumerate USB device on port 5 [ 598.474842] hub 4-0:1.0: unable to enumerate USB device on port 5 [ 599.002838] hub 4-0:1.0: unable to enumerate USB device on port 5 [ 599.518833] hub 4-0:1.0: unable to enumerate USB device on port 5 [...] + + <b>Updates</b> + + This bug is still present in Ubuntu 9.04 and Ubuntu 9.10, for example in + 2.6.31-14-generic-pae. It makes consoles almost impossible to use, and + causes a lot of writes due to the constant updating of /var/log/syslog. + + A suggestion of the cause is at http://lkml.org/lkml/2008/10/24/209 -- USB devices work, but constant syslog errors "unable to enumerate USB device on port 5" https://bugs.launchpad.net/bugs/256767 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
