Author Topic: USB Extension Querry  (Read 3870 times)

Pita

  • Vectorian
  • ****
  • Posts: 1349
USB Extension Querry
« 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?

Joe1962

  • Administrator
  • Vectorian
  • *****
  • Posts: 2504
    • Joe1962's Website
Re: USB Extension Querry
« Reply #1 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... ::)
O'Neill (RE the Asgard): "Usually they ask nicely before they ignore us and do what they damn well please."
http://joe1962.bigbox.info
Running: VL 7 Std 64 + self-cooked XFCE-4.10

nightflier

  • Administrator
  • Vectorian
  • *****
  • Posts: 4508
Re: USB Extension Querry
« Reply #2 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.

Joe1962

  • Administrator
  • Vectorian
  • *****
  • Posts: 2504
    • Joe1962's Website
Re: USB Extension Querry
« Reply #3 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.
O'Neill (RE the Asgard): "Usually they ask nicely before they ignore us and do what they damn well please."
http://joe1962.bigbox.info
Running: VL 7 Std 64 + self-cooked XFCE-4.10

GrannyGeek

  • Packager
  • Vectorian
  • ****
  • Posts: 2567
Re: USB Extension Querry
« Reply #4 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
Registered Linux User #397786

Happily running VL 7 Gold on  a Sempron LE-1300 desktop (2.3 GHz), 4 G RAM,  GeForce 6150 SE onboard graphics and on an HP Pavilion dv7 i7, 6 gigs, Intel 2nd Generation Integrated Graphics Controller

Pita

  • Vectorian
  • ****
  • Posts: 1349
Re: USB Extension Querry
« Reply #5 on: December 01, 2008, 10:22:55 pm »
Thanks all!

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

Cheers
« Last Edit: December 02, 2008, 03:01:16 am by Pita »

rbistolfi

  • Packager
  • Vectorian
  • ****
  • Posts: 2383
Re: USB Extension Querry
« Reply #6 on: December 02, 2008, 06:39:24 am »
That means basically I have the equivalent amount of 2 cases beer wasted.

LMAO
"There is a concept which corrupts and upsets all others. I refer not to Evil, whose limited realm is that of ethics; I refer to the infinite."
Jorge Luis Borges, Avatars of the Tortoise.

--
Jumalauta!!

Joe1962

  • Administrator
  • Vectorian
  • *****
  • Posts: 2504
    • Joe1962's Website
Re: USB Extension Querry
« Reply #7 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
O'Neill (RE the Asgard): "Usually they ask nicely before they ignore us and do what they damn well please."
http://joe1962.bigbox.info
Running: VL 7 Std 64 + self-cooked XFCE-4.10