ehci_hcd causes general usb problems

[tom_bxl]

Hi,

I start a new thread following this thread and a post in this one .

I have USB 1 (UHCI) and USB 2 (EHCI) controller so I compiled the modules uchi_hcd and ehci_hcd (gentoo-sources 2.6.18-r4)

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zorglub ~ # lspci | grep USB
00:10.0 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 81)
00:10.1 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 81)
00:10.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 81)
00:10.3 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 81)
00:10.4 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 86)

When the ehci module is loaded, hardly no usb device works (scanner, camera, webcam, USB stick). If I remove it, everything works perfectly.

I switched on the USB verbose debug message option in the kernel. When I modprobe the module, it finds all the attached devices and does not report any error. When trying to access the scanner, I get the following:

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Jan 13 10:19:27 zorglub usbdev5.2_ep81: ep_device_release called for usbdev5.2_ep81
Jan 13 10:19:27 zorglub usbdev5.2_ep02: ep_device_release called for usbdev5.2_ep02
Jan 13 10:19:28 zorglub usbdev5.2_ep81: ep_device_release called for usbdev5.2_ep81
Jan 13 10:19:28 zorglub usbdev5.2_ep02: ep_device_release called for usbdev5.2_ep02
Jan 13 10:19:28 zorglub usbdev5.2_ep81: ep_device_release called for usbdev5.2_ep81
Jan 13 10:19:28 zorglub usbdev5.2_ep02: ep_device_release called for usbdev5.2_ep02

Same sort of output for the camera.

I check on the usb user mailing lists and googled around but could not find any similar problem. There are a couple of bugs related to the VIA controllers but they seem to be all fixed in this kernel release.

Any idea?

Tom

[tom_bxl]

For information, I get the same symptoms when connecting the scanner to my laptop. The controller in this case is an Intel.