On Mon, 8 Feb 2010, Andrew Morton wrote: > > http://bugzilla.kernel.org/show_bug.cgi?id=15253 > > > > Summary: USB audio headset crashes entire USB subsystem > > After plugging in Logitech ClearChat Comfort USB headset and listening > > to/recording sound for 2-5 minutes, all audio input/output from the device > > stops and any programs that try to play sound lock up. This includes volume > > managers, flash applications, media players, and so on. Locked applications can > > usually be unfrozen by removing the device. However, after the device has been > > removed, some time later (exactly how long varies) the USB mouse will stop > > responding. Keyboard functionality is uninhibited. After this point, any USB > > devices that are plugged into the machine, including ones that are removed > > after the crash and plugged back in are not detected and receive no power from > > the computer. A reboot is the only way I have found to restore control. Do this: Build a kernel with CONFIG_PRINTK_TIME, CONFIG_FRAME_POINTER, CONFIG_DEBUG_FS, and CONFIG_USB_DEBUG all enabled. Run your test, and when the audio stops _don't_ try to start or kill any audio applications. Instead attach a copy of the dmesg log to the bug report and post an email message to let us know when the log is ready. Based on the log contents, we'll see what happens next. Going by the information you already provided, I'd guess there's something funky about your nVidia USB controller hardware. 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
