I'll report if I get any further.
Malcolm.
Alan Stern wrote:
That certainly looks like things go wrong just at the time the full-speed bandwidth reclamation gets turned on. Why should FSBR cause any problems?
The only thing that occurs to me now is that with FSBR, the UHCI controller starts making some heavy demands on the PCI bus. Maybe it's somehow managing to mess up or monopolize the bus. Why should this only show up under Linux 2.6 and not other operating systems? I don't know -- maybe there's a difference in some aspect of the PCI configuration.
While I'm here, I also found that the working boards we have (a 400MHz model) also run slowly when using the old uhci.c driver with the 2.4.18 kernel. Going to the 2.4.19 kernel, this driver runs fast. So I thought this might help me with the 600MHz board I'm having trouble with, since they have the same VIA VT82C686A chip. Can anyone tell me of any functional changes that occurred at that time? I don't know if it's related, but I'm looking into it anyway.
I don't know what changed.
Alan Stern
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