--- On Fri, 8/1/08, myblog1980 <[EMAIL PROTECTED]> wrote:
> <snip> I'm an Ubuntu user who is having an ongoing problem
> with USB file
> transfers. This issue also seems to be affecting a
> significant number
> of other Ubuntu users, and I have also been reading reports
> of it
> appearing in other distros. </snip>
I have had similar problems with usb transfers in the past, one on an external
hdd (seagate - there are other problems there such as disk spindown and how the
firmware responds afterwards that make it of little use for this test) also a
1GB mp3player which after a few songs transfered the connection drops to a crawl
> <snip> This is the issue: USB file transfers start off at full
> speed, the
> rapidly slow down, to speeds as low as 2mb/s, irrespective
> of the USB
> device, whether it's flash drive or a HDD. Many of the
> users that are
> being affected are experiencing it to different degrees,
> some get half
> the USB transfer speeds they are expecting, others get the
> full
> slowdown. Additionally, it doesn't always happen. In
> my experience,
> I've occasionally had a transfer speed at near the
> expected rate, but
> that's been rare. </snip>
> Furthermore, this problem affects the GUI's
> responsiveness if a slow
> file transfer is allowed to continue running for a long
> time. What
> happens is that performance of the GUI slows to almost the
> point of
> being unusable, windows are being redrawn in slow motion
> and key presses
> take seconds to be detected. At the same time, the CPU is
> barely
> registering any activity. Cancelling the file transfer
> restores the
> system's performance immediately.
on my system (looking at the output of top and atop suggests a high degree of
swapping going on during transfers, especially if other actions are being
preformed at the same time. if this is a part of the problem I cannot say, just
that it seems to be in my case. (cpu usage is almost 0 but swapping is going on
like crazy. I would wonder if it closer to a paging error if that is the case
<snip rest of message>
jwlockhart
Registered Linux User #458799
this user is penguin powered
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