On Sat, 31 Oct 2009, Justin Piszcz wrote: > Hello, > > SUMMARY: P55 Chipset/USB has issues with UPS' (broken pipe on 3 diff UPS') > WORKAROUND: Buy/use PCI USB card if you want to use nut/connect a UPS. > NOTES: All other USB (non-UPS) devices seem to function without any > problems. > > On Thu, 29 Oct 2009, Justin Piszcz wrote: > > > Problem: When I migrated from a DG965WH -> DP55KG motherboard, there were > > quite a bit of issues, host still does not reboot without special flags, e.g. > > reboot=a, the NIC driver is broken with the in-kernel version (the one on > > e1000.sourceforge) fixes that and finally my UPS USB has driver stale > > problems, with two issues already relating to the HW/drivers themselves it > > would not be unrealistic to speculate that there could be an issue with the > > USB chipset/driver with this P55 motherboard. > > -- > > Tried another APC 1500VA UPS, same problem occurs, different cable/port etc. > > Problem appears to be the Intel P55KG / USB Chipset in the way that it > handles usbhid-raw devices as CD/USB sticks/kbd/mouse/etc do not appear to > be affected. > > So far all other USB devices work fine, with the exception of UPS', I > have tested two APC 1500VA (one an RS the other an XS), in addition I also > have a 'BELKIN 1200VA UPS with AVR' from a long time ago, the same > problem occurs. ... > A bit frustrated, I popped in a PCI card with 4 external USBs, and now no > more errors: We might learn something by comparing two usbmon logs for the same UPS device, one plugged into a USB port on the motherboard and the other plugged into an add-on card. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
