On Tuesday 08 Jul 2003 4:57 am, Carroll Grigsby wrote: > On Monday 07 July 2003 03:49 pm, James Sparenberg wrote: > > On Mon, 2003-07-07 at 16:13, Pierre Fortin wrote: > > > Just a heads up... > > > > > > I have not fully analyzed this; but my HP 5550 (USB2.0) > > > printers will not work if connected to a USB/PCMCIA port. My > > > camera, external HDs, etc, all work off the SIIG USB PCMCIA > > > 4-port hub; but the printers will only work if connected to the > > > laptop's builtin USB1.1 port. > > > > > > CUPS reports "Unable to open USB device > > > "usb://hp/deskjet%205550": No such device", even after redoing > > > the printer setup via http://localhost:631 > > > > > > Just moving the cable from the PCMCIA to the builtin port > > > allows queued jobs to print. > > > > Pierre, > > > > Is it possible.. (and this is a real stab in the dark.) that > > the printer doesn't recognize the hub as a real USB port? So it > > doesn't "activate". I've got an Epson that does that no matter > > what OS is on the other end. When I boot the box with the > > printer connected to the USB hub... I don't get all of the > > chugging and churning I normally get when it's directly > > connected. We got rid of the hub plugged it in directly and ... > > poof it works. Go figure. > > > > James > > I recall reading that some external USB hubs are not powered, and > therefore are only usable with passive devices. That might explain > James' problem, but probably not Pierre's. > -- cmg
I use a powered external hub with my DeskJet 990Cxi, and Mdk finds it and prints without problem. Windows, however, will not install the printer if it is on the hub. I have to plug in to a direct port to install, after which it prints from the hub - which only proves that usb is an utter mystery:-( Anne
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