On Friday 29 October 2004 09:49, Alan Stern wrote: > On Fri, 29 Oct 2004, Johannes Berg wrote: > > > > Anyway, I don't see what can be done about it. The "host system error" > > > means that there was a PCI abort (or something similar) while the USB > > > controller was using the bus. Undoubtedly a hardware problem. Probably > > > it's intermittent because the controller doesn't use the PCI bus all the > > > time. > > > > Thanks for that explanation. Does make me wonder though why I only see > > this with USB, when the problem is on the PCI level. Shouldn't I see > > different things failing as well (like sound playing?) > > I don't know. Maybe the USB controller uses the PCI bus more heavily, or > maybe it's just more sensitive to the speed change.
Or maybe the clock used by the HC needs to have its multiplier(s) changed along with the CPU clock. Or the PCI clock changed. I've certainly seen that sort of thing happen with other peripheral clocks. It'd seem an odd thing to do with USB though ... I wouldn't expect any fixed frequency clock would change, and I thought that cpufreq would only really affect "Northbridge" related timings. - Dave ------------------------------------------------------- This SF.Net email is sponsored by: Sybase ASE Linux Express Edition - download now for FREE LinuxWorld Reader's Choice Award Winner for best database on Linux. http://ads.osdn.com/?ad_id=5588&alloc_id=12065&op=click _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
