Comment 152 for bug 197762

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 <email address hidden> 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)
>