On Mon, 06 Mar 2006 15:22:04 -0000, Alan Stern <[EMAIL PROTECTED]>
wrote:
On Sun, 5 Mar 2006, Stephen Blythe wrote:
Hi,
I am using Gentoo linux with kernel 2.6.15-gentoo-r1.
I have the following configured as modules: usbcore, uhci-hcd, usblp.
No
other usb modules are configured.
My problem is that devices are not detected, at some stage, when
connected.
This is what I do:
1. Load the modules
"modprobe usbcore; modprobe uhci-hcd"
2. Verify the modules have been loaded with lsmod
3. Use lsusb to look at the host device. Output:
Bus 001 Device 001: ID 0000:0000
4. Plug in any other device (Lexmark Z53 printer, storage key etc.)
5. Use lsusb to, hopefully, see a new device. Output:
Bus 001 Device 001: ID 0000:0000
so apparently, still just my UHCI-HCD.
6. If I use lsusb -v before and after connecting the device, the
differences are:
< Port 1: 0001.0100 C_CONNECT power
---
> Port 1: 0001.0101 C_CONNECT power connect
so apparently something is happening somewhere!
(I'm also checking /proc/bus/usb, so it isn't lsusb which is at fault.)
I'd be really grateful for any pointers!
What shows up in the kernel logs?
You can get more information in the log if you turn on the USB verbose
debugging option in the kernel configuration (CONFIG_USB_DEBUG) and
rebuild the drivers.
Alan Stern
Thanks for your taking the trouble to reply, Alan.
I seem to have resolved the problem now (by unconfiguring ACPI in the
kernel).
I read somewhere that ACPI is unreliable on the Thinkpad 600X and gave it
a shot.
Seems to have resolved the problem.
In answer to your question, I already had the debug enabled, and this was
the last USB-related thing I saw in the kernel logs when it didn't work:
uhci_hcd 0000:00:07.2: suspend_rh (auto-stop)
I didn't see anything further when I plugged devices in.
Now, with ACPI removed, I see the following when I plug something in:
uhci_hcd 0000:00:07.2: wakeup_rh (auto-start)
plus a whole load of other guff, and it works.
I haven't looked into it any further, as it is now working, but the
appearance of the words "suspend" and "wakeup" suggests to me that I'm
right about ACPI being the problem.
Hopefully someone searching through the list archives in the future will
find this message useful!
Thanks again,
Stephen
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