Hi David,
***Mar 6 11:59:27 Webdesktop kernel: PCI: 00:10.3 PCI cache line size set incorrectly (32 bytes) by BIOS/FW. ***Mar 6 11:59:27 Webdesktop kernel: PCI: 00:10.3 cache line size too large - expecting 16.
Odd -- what kind of CPU does that have?
An AthlonXP 1600+ (Palomino). Would this really impact on the stability of
the USB 2.0?
I'm not quite sure what it would affect, but your kernel is misconfigured. Athlons -- all of them! -- use 64 byte cache lines, not 16 byte ones. I'd expect it doesn't really affect anything beyond preventing that PCI feature from working; caches are supposed to be transparent except for performance consequences.
if you haven't been seeing lost IAA statistics when you "rmmod ehci-hcd", like "(lost 223)", that'd be my guess as to why our results seem different.
After unloading ehci-hcd, there were some messages. After copying 530Mb of files to the USB 2.0 HDD: ehci-hcd 00:0a.2 (NEC USB 2.0 Unused): irq normal 0 err 0 reclaim 0 (lost 0) ehci-hcd 00:10.3 (VIA USB 2.0 Used): irq normal 158604 err 1 reclaim 11330 (lost 102)
It means your VT8235 has that "lost IAA" erratum. So far as I know, you shouldn't be suffering too much from it (my workaround seems to behave). What I don't know is what other errata apply, since that's the only erratum VIA has confirmed to me.
- Dave
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