On Thu, 25 Nov 2010, Alexander E. Patrakov wrote: > Hello. > > After switching my Gentoo desktop from sysvinit + openrc to systemd, I > started getting "nobody cared" messages about IRQs 16 and 19 (common > thing: they are assigned to the USB controllers, that's why CC: According to your listing, they are used by uhci-hcd. Do the messages go away if you unload uhci-hcd before shutting down? > linux-usb) at shutdown. Also, instead of shutting down immediately, the > kernel started waiting for something to time out (and after the timeout, > it does power off the computer). Adding the "irqpoll" parameter does > work around the issue. A screen photo illustrating the problem and the > kernel config are attached. > > I didn't try to bisect because there is no known good kernel. I.e., the > issue doesn't exist without systemd, and I didn't run systemd with > earlier kernels. > > Please help diagnosing and, if possible, fixing this problem. > > The broken image at the top of the screen is from extlinux (I use it to > boot the kernel because I don't like grub). You may need to debug the uhci-hcd driver. Look into drivers/usb/host/uhci-hcd.c; the uhci_shutdown() routine ought to be called and it ought to call uhci_hc_died(), which in turn calls uhci_reset_hc() in pci-quirks.c, which is supposed to prevent the controller from generating any IRQs. Do you have any USB devices attached to bus 3 or bus 6? 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
