Thanks for the info, Ts'o. But your comment about libusual caught my eye. In Ubuntu 9.04 this module still shows up, right?
[81601.434729] usbcore: registered new interface driver libusual ---------------------------- Linux: Because rebooting is for adding new hardware. Sent from Brasilia, DF, Brazil On Wed, May 20, 2009 at 5:32 PM, Theodore Ts'o <ty...@mit.edu> wrote: > Night64: > > No, you're using usb-storage device driver for both the pendrive and the > ipod. The messages that you quoted as coming from the ipod just means > that the usb-storage module had gotten unloaded, and when it was loaded > as a module, it prints those lines to the kernel log. The fact that > things were fast going to the ipod and variable when you write to the > your USB flash device tends to indicate that the problem is specific to > the flash device; it might just be that the flash device is sometimes > slower because writing to flash can be slower sometimes, and it might > be exacerbated by the FAT filesystem, which is never known as a speed > demon. > > Note that this might not be true for other users on this bug report --- > which is why I've suggested everyone file separate bug reports. People > using Ubuntu 8.10 might possibly have been using the Low Performance USB > storage driver, which Canonical inexplicably configured into older > Ubuntu kernels. Anyone using that will definitely see massive > performance problems --- and this has been known for ages. (Another > reason why many kernel developers aren't happy trying to clear up > Ubuntu-specific bugs....) In any case, this kernel configuration bug > doesn't seem to be a problem for Ubuntu 9.04; libusual.ko doesn't appear > to be built any more, which is a Very Good Thing. Some users from a > year ago who might have been using the low performance USB driver might > have a very different problem than yours --- which is why it's better > for each user to open separate bug reports. > > Remember that most of the people with the experience and knowledge to > help are volunteers. If Ubuntu users continue to make life difficult, > kernel developers will simply stop volunteering to wade through the > cesspit of Ubuntu launchpad bugs.... > > -- > file transfers on USB disk are very slow > https://bugs.launchpad.net/bugs/197762 > You received this bug notification because you are a direct subscriber > of the bug. > > Status in gvfs: Invalid > Status in “gvfs” source package in Ubuntu: Invalid > Status in “linux” source package in Ubuntu: Confirmed > > Bug description: > When transferring large files (800meg) or even medium-size files (200meg), > the transfer rate decreases constantly. It starts at around 4meg/sec and > goes down to even less than 800kb/s. When I cancel the download and start it > over again, the transfer rate comes back up to 4meg/sec. > I am using Nautilus on Ubuntu 8.04 (hardy heron) > -- file transfers on USB disk are very slow https://bugs.launchpad.net/bugs/197762 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