VectorLinux

The nuts and bolts => Hardware & Drivers => Topic started by: Pita on December 01, 2008, 12:33:29 am

Title: USB Extension Querry
Post by: Pita on December 01, 2008, 12:33:29 am
Since my mobo has only 2 USP ports I bought myself one of those
extensions with 4 outlets. To one of them I have connected my
printer and it is working well in slackware-12.1

This morning I connected to another extension my camera and could
not mount vl-hot. Went to VL5.8 same thing.

I finally found that the camera will only work when directly connected to the USB
port and not via the extension.

Now I installed VL6-Light-alpha14. Got my printer USB connection configured
yet the printer would not print. Connection was via the USB extension. Having
become wise I plugged directly,-- et voila the printer started to print.

My question: has anybody such an experience with USB extensions that they
might work or not depending on --now what?
Title: Re: USB Extension Querry
Post by: Joe1962 on December 01, 2008, 07:25:22 am
My question: has anybody such an experience with USB extensions that they
might work or not depending on --now what?

Oh yes, it happens. I have 2x 250GB external USB HDDs now (same HDD model, but different enclosures) and on a certain PC with USB2 hub, one of them will not work, while the other does. Go figure... ::)
Title: Re: USB Extension Querry
Post by: nightflier on December 01, 2008, 08:11:04 am
Unless your USB expansion hub has it's own power supply, multiple devices can easily demand more power than the single USB port can deliver.

If you have an open PCI slot in your computer, an expansion card with USB ports usually works better than an unpowered hub.
Title: Re: USB Extension Querry
Post by: Joe1962 on December 01, 2008, 09:07:02 am
That is definitely one source of problems, but my example was with powered external HDD boxes, so there are other factors at play.
Title: Re: USB Extension Querry
Post by: GrannyGeek on December 01, 2008, 08:34:35 pm
My question: has anybody such an experience with USB extensions that they
might work or not depending on --now what?

Yes, this does happen. It happens in Windows, too, so don't blame Linux.<g> One of the first steps for troubleshooting USB problems is to attach the device directly to a USB port, not a hub or extension. Connecting directly to a port sometimes solves the problem.
--GrannyGeek
Title: Re: USB Extension Querry
Post by: Pita on December 01, 2008, 10:22:55 pm
Thanks all!

That means basically I have the equivalent amount of 2 cases beer wasted.

Cheers
Title: Re: USB Extension Querry
Post by: rbistolfi on December 02, 2008, 06:39:24 am
That means basically I have the equivalent amount of 2 cases beer wasted.

LMAO
Title: Re: USB Extension Querry
Post by: Joe1962 on December 02, 2008, 06:51:28 am
My question: has anybody such an experience with USB extensions that they
might work or not depending on --now what?
Yes, this does happen. It happens in Windows, too, so don't blame Linux.<g>
Indeed, though I forgot to add that in my first post, the example was on a Windows PC... ;D