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I have a USB keyboard and mouse connected to a USB KVM switch, which is in turn connected to 3 workstations. Occasionally, the keyboard and mouse go unresponsive on the main workstation. When it occurs, I start getting messages like this in the ring buffer: drivers/hid/usbhid/hid-core.c: control queue full once this happens, the USB subsystem seems to be totally unresponsive. New devices are not recognized (though disconnect messages do seem to show up in the ring buffer for devices that are already plugged in). Trying to do things like a lsusb hangs hard (probably in D state, but I need to confirm). It seems like this problem hits somewhat regularly when I tap the capslock or numlock keys a few times in rapid succession -- not always, but often... The motherboard here is a Gigabyte GA-MA69GM-S2H, I've patched it up to the latest BIOS from the mfr. Currently running kernel 2.6.23.15-137.fc8, but I've had this problem on earlier kernels too. Info from lspci: 00:13.0 USB Controller: ATI Technologies Inc SB600 USB (OHCI0) 00:13.1 USB Controller: ATI Technologies Inc SB600 USB (OHCI1) 00:13.2 USB Controller: ATI Technologies Inc SB600 USB (OHCI2) 00:13.3 USB Controller: ATI Technologies Inc SB600 USB (OHCI3) 00:13.4 USB Controller: ATI Technologies Inc SB600 USB (OHCI4) 00:13.5 USB Controller: ATI Technologies Inc SB600 USB Controller (EHCI) I've been working on getting kdump to work on this machine, but have had no luck so far. I'll keep plugging away at it if it would be helpful. I can still ssh into the box when this happens so I should be able to gather any info from the machine when it occurs.
Created attachment 294691 [details] output from lsusb -vvv
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