On Thu, 18 Nov 2010, Manuel Lauss wrote: > On Thu, Nov 18, 2010 at 5:20 PM, Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote: > > On Thu, 18 Nov 2010, Manuel Lauss wrote: > > > >> Hello, > >> > >> Current Linux kernels have problems with my current USB setup: > >> I have a HP zr24w monitor with an integrated USB2 hub attached to > >> an ATI SB850 OHCI/EHCI controller, and an old logitech wireless receiver > >> plugged into one of the monitors' hub ports. > >> > >> When linux boots and the zr24w is plugged in, linux usb core throws > >> the errors below. Unplugging/replugging on other ports doesn't work > >> either. However if when linux boots the zr24w is disconnected and > >> plugged in when linux has finished booting, it works without a hitch. > >> No problems on window or the BIOS for that matter. > > > > It's not clear what the problem is, other than the fact that the > > monitor's integrated hub isn't working right. What happens if you plug > > the wireless receiver directly into the computer instead of plugging it > > into the monitor? > > There's no problem there of course. What irks is that the problem appears > when the receiver is plugged into the monitors hub and the monitor plugged > in to the SB850 when linux boots. And only then, all other combinations of > usb devices and plugging strategies work fine. Maybe it's a problem with > the BIOS' keyboard emulation? Maybe, although the log didn't contain any error messages from the BIOS handoff code (which runs pretty early during device detection). Unfortunately problems during boot-up are hard to debug, for obvious reasons. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
