Created attachment 26249 [details] BUGs unplugging Quicksilver when ports are opened Details in the dmesg output; the usb_urb_free() BUG does not happen on F12's 2.6.32.11-99.fc12.x86_64, but does happen on F13's 2.6.33.2. Test system is a stock Fedora 13 Thinkpad T42 (32-bit only). The throttling error happens on both 2.6.32.11 and 2.6.33.2 and thus that part is not a regression. The throttling error only occurs with Icera-based Option devices (as opposed to Qualcomm-based ones) because the Icera-based devices start spewing output to certain ttys once you open them. See also: https://bugzilla.kernel.org/show_bug.cgi?id=15915 https://bugzilla.kernel.org/show_bug.cgi?id=15916
The hso_disconnect()/usb_free_urb() BUG is also present on non-Icera based devices like the GT MAX 3.6.
All USB bugs should be sent to the linux-usb@vger.kernel.org mailing list, and not entered into bugzilla. Please bring this issue up there, if it is still a problem in the latest kernel release.