[linux-usb-devel] ThinkPad T41 - Strange USB 2.0 behaviour

2007-06-07 Thread Robert de Rooy
Hi, On my ThinkPad T41 USB 2.0 behaves strange. Most USB 2.0 devices, refuse to function as such. Under Windows I get a message that I should plug the device into a USB 2.0 port (but it continues to function as USB 1.1), while under Linux I need to manually unload ehci-hcd before I can access

Re: [linux-usb-devel] ThinkPad T41 - Strange USB 2.0 behaviour

2007-06-08 Thread Robert de Rooy
Alan Stern wrote: > Robert, it would help somewhat if you could build a kernel with > CONFIG_USB_DEBUG turned on and post the dmesg log showing what happens > when you plug in one of those non-working devices. > Sorry, yes I should have done that before... > Yes, in principle Linux can be made

Re: [linux-usb-devel] ThinkPad T41 - Strange USB 2.0 behaviour

2007-06-11 Thread Robert de Rooy
Alan Stern wrote: > Okay. It's clear that you've got a hardware problem of some sort. > Hard to say what it is, but evidently the EHCI controller thinks that > the device is repeatedly being unplugged and replugged. > > Anyway, this isn't a problem of recognizing that a single device is > havin

Re: [linux-usb-devel] ThinkPad T41 - Strange USB 2.0 behaviour

2007-06-11 Thread Robert de Rooy
Alan Stern wrote: > On Tue, 12 Jun 2007, Robert de Rooy wrote: > > >> Yes that works. >> I tried to plug and unplug the device repeatedly and each time it came >> up in full-speed mode. >> > > Good! I'm glad that "companion" attribut