Kernel Bug Tracker – Bug 5250
Cannot find USB devices on 126.96.36.199, on ICH4m chipset
Last modified: 2005-10-05 10:34:43 UTC
Most recent kernel where this bug did not occur: 188.8.131.52
Distribution: Debian unstable
Hardware Environment: Toshiba R100 laptop, see
Software Environment: Vanilla 184.108.40.206 from kernel.org
Geting the message "ehci_hcd 0000:00:1d.7: Unlink after no-IRQ? Controller is
probably using the wrong IRQ" when trying to get at USB, following some bad PCI
stuff above, see dmesg.
Steps to reproduce:
Boot the machine into 220.127.116.11
Created attachment 6013 [details]
The .config file
Created attachment 6014 [details]
the dmesg output
Created attachment 6015 [details]
Created attachment 6016 [details]
Please report whether (and how!) the IRQ assignments are different
between 18.104.22.168 and 22.214.171.124 ... if they're different (like EHCI
not being on irq11) that suggests the issue is ACPI IRQ setup again.
Also, that "UHCI irq happens too early" thing seems likely to be
related to BIOS issues. Try the "usb-handoff" kernel command line
parameter, and disabling USB keyboard/mouse support in the BIOS.
Created attachment 6025 [details]
This is my first Kernel Bug, so bear with me --- I am attachning the
/var/log/messages and lspci -v from the 126.96.36.199. I will try later to boot with
the option you mentioned. and dig into the BIOS to play with the USB keyboard
Created attachment 6026 [details]
188.8.131.52 lspci -v
"usb-handoff" worked. Oddly, it did not work as an "append=" in lilo.conf. I
suppose now it becomes a doc issue.
Ok, closing then.