Sepherosa Ziehau <[email protected]> wrote: >> >> Just noticed that even with revision >> 7e7d17cb48838b48389fb990950f2959b9635e63 >> I still can't mount the root disk iff I load usb modules (usb, ehci, >> umass) during boot via /boot/loader.conf - which I normally don't to >> allow CPU to enter C3 state. > > You box is UP, so only i8254 is used. C3 does not affect the i8254 > interrupt timer.
Right, but usb modules prevent the CPU from entering C3 generally (As far as I know it's a bus mastering DMA thing). > >> >> So maybe this is just some sort of timing problem? >> Is anyone else seeing this? I guess thinkpads are quite common here. > > This looks very strange, could you give me the bootverbose dmesgs: > w/ ACPI, w/o usb modules http://leaf.dragonflybsd.org/~hofmann/acpi_nousb.dmesg > w/o ACPI, w/ usb modules http://leaf.dragonflybsd.org/~hofmann/noacpi_usb.dmesg > I think using these two combinition, your box is booting? Exactly > > BTW, what will happen if you load USB modules after boot? That works fine. Thanks, Johannes
