Re: "Found HC with no IRQ" empty /proc/bus/usb

[Sergio Monteiro Basto <sergio-qOf5bGQp09kptuEoxK/DLR2eb7JE58TQ@public.gmane.org>]

is the age of the Bios is less then 2001 ? probably is , if so, you
should append "acpi=force" to enable ACPI.
On some Bios configurations, you also have to enable ACPI and disable
APM ( on Bios configuration )




On Fri, 2005-04-01 at 13:00 -0500, Allan Mcintosh wrote:
> Hey,
> 
> On my debian Dual 550MHz Pentium III machine, I am unable to get usb
> working. I didn't notice anything obvious in the bios that would disable
> USB. Any suggestions would be greatly appreciated.
> 
> I have tried several kernels, most recently 2.6.10 and 2.6.11.5.
> I have also tried booting with variations of
> 
> append="noapic acpi=off pci=biosirq"
> 
> 
> Upon loading uhci_hcd module I see the following
> 
> $ dmesg
> <snip>
> usbcore: registered new driver usbfs
> usbcore: registered new driver hub
> usbcore: registered new driver hiddev
> usbcore: registered new driver usbhid
> drivers/usb/input/hid-core.c: v2.0:USB HID core driver
> USB Universal Host Controller Interface driver v2.2
> PCI: Enabling device 0000:00:07.2 (0000 -> 0001)
> PCI: No IRQ known for interrupt pin C of device 0000:00:07.2. Probably
> buggy MP table.
> uhci_hcd 0000:00:07.2: Found HC with no IRQ.  Check BIOS/PCI
> 0000:00:07.2 setup!
> 
> 
> 
> $ lspci -vv
> <snip>
> 0000:00:07.2 USB Controller: Intel Corp. 82371AB/EB/MB PIIX4 USB (rev
> 01) (prog-if 00 [UHCI])
>         Control: I/O+ Mem- BusMaster- SpecCycle- MemWINV- VGASnoop-
> ParErr- Stepping- SERR- FastB2B-
>         Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
> <TAbort- <MAbort- >SERR- <PERR-
>         Interrupt: pin D routed to IRQ 0
>         Region 4: I/O ports at ef80 [size=32]
> 
> 
> $ lsmod
> Module                  Size  Used by
> uhci_hcd               34640  0
> ehci_hcd               34180  0
> usbhid                 33184  0
> usbcore               123096  3 uhci_hcd,ehci_hcd,usbhid
> <snip>
> 
> 
> 
> 
> 
> 
> 
> 
> 
-- 
Sérgio M.B.



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