Alan Stern wrote:
Yes I realize it. It is an ancient piece of hardware. But still powerful enough to act as a network gatewayOn Sat, 30 Oct 2004, Duncan Sands wrote:
I think I tracked down the source of all this pain. It is the USB Controller: Intel Corp. 82371SB PIIX3 USB [Natoma/Triton II] (rev 01). I searched SpeedTouch mailing list for this one and found a few messages from people having problems with this host controller (I must have been blind I did not discovered them earlier). One of them (http://www.mail-archive.com/[EMAIL PROTECTED]/msg03622.html) even says a line about 0xFF sequences.Hi Andrej, that's an interesting link you found. Maybe Alan can comment on
There seems to be a workaround in userspace driver by adding delay into read procedure though it affects the connection speed. Haven't tested it yet.
So now the question stands: Is there any way to get this buggy host controller work under Linux? I suppose that easiest thing to do would be to buy a new USB card. But I don't like this solution much because Windows can harness the controller without problems. Does anyone knows what causes problems with this specific controller in Linux?
this?
I was unaware of it. The PIIX3 is pretty old now -- I've got a computer purchased back in the 1990's and it has a PIIX4.
(apart this old USB controller).
Does the problem of lost interrupts still occur under 2.6.10-rc1? Are the interrupts getting lost in the controller hardware, on the system board, or in the operating system?I tried 2.6.8.1 kernel and some 2.6.9 kernel with -mm patches (it was about month ago). I'll give it a try
with 2.6.10 one and post the results.
About the interrupts: I have no idea whether or where are they lost. How can figure it out? I guess it
would difficult to debug. But if it is an interrupt problem, I don't understand why it shows up so quickly
when tranferring 0xFF bytes and why it is not trigerred by 0x00 bytes. Any ideas?
I'll try to reproduce this problem with my USB flash disk. Maybe it'll shed more light into this problem.
Regards,
Andrej
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